From be25c443137582f8de4c8faea9427f97d9a79023 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Tue, 26 Mar 2024 17:22:32 -0700
Subject: [PATCH 01/31] WIP Excel Adding At-Signs to Functions

This has come up a number of times, most recently with issue #3901, and also issue #3659. It will certainly come up more often in days to come. Excel is changing formulas which PhpSpreadsheet has output as `=UNIQUE(A1:A19)`; Excel is processing the formula as it were `=@UNIQUE(A1:A19)`. This behavior is explained, in part, by https://github.com/PHPOffice/PhpSpreadsheet/pull/3659#issuecomment-1663040464. It is doing so in order to ensure that the function returns only a single value rather than an array of values, in case the spreadsheet is being processed (or possibly was created) by a less current version of Excel which cannot handle the array result.

PhpSpreadsheet follows Excel to a certain extent; it defaults to returning a single calculated value when an array would be returned. Further, its support for outputting an array even when that default is overridden is incomplete. I am not prepared to do everything that Excel does for the array functions (details below), but this PR is a start in that direction. If the default is changed via:
```php
use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
```
When that is done, `getCalculatedValue` will return an array (no code change necessary). However, Writer/Xlsx will now be updated to look at that value, and if an array is returned in that circumstance, will indicate in the Xml that the result is an array *and* will include a reference to the bounds of the array. This gets us close, although not completely there, to what Excel does, and may be good enough for now. Excel will still mess with the formula, but now it will treat it as `{=UNIQUE(A1:A19)}`. This means that the spreadsheet will now look correct; there will be superficial differences, but all cells will have the expected value.

Technically, the major difference between what PhpSpreadsheet will output now, and what Excel does on its own, is that Excel supplies values in the xml for all the cells in the range. That would be difficult for PhpSpreadsheet to do; that could be a project for another day. Excel will treat the output from PhpSpreadsheet as "Array Formulas" (a.k.a. CSE (control shift enter) formulas because you need to use that combination of keys to manually enter them in older versions of Excel). Current versions of Excel will instead use "Dynamic Array Formulas". Dynamic Array Formulas can be changed by the user; Array Formulas need to be deleted and re-entered if you want to change them. I don't know what else might have to change to get Excel to use the latter for PhpSpreadsheet formulas, and I will probably not even try to look now, saving it for a future date.

Unit testing of this change uncovered a bug in Calculation::calculateCellValue. That routine saves off ArrayReturnType, and may change it, and is supposed to restore it. But it does not do the restore if the calculation throws an exception. It is changed to do so.
---
 .../Calculation/Calculation.php               |   1 +
 src/PhpSpreadsheet/Cell/Cell.php              |   2 +-
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  |  16 ++-
 .../Worksheet/Table/Issue3659Test.php         |  61 +++++++++
 .../Writer/Xlsx/ArrayFunctionsTest.php        | 127 ++++++++++++++++++
 5 files changed, 205 insertions(+), 2 deletions(-)
 create mode 100644 tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php

diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 6028a9d72f..7a2137dc06 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -3489,6 +3489,7 @@ public function calculateCellValue(?Cell $cell = null, bool $resetLog = true): m
                     $testSheet->getCell($cellAddress['cell']);
                 }
             }
+            self::$returnArrayAsType = $returnArrayAsType;
 
             throw new Exception($e->getMessage(), $e->getCode(), $e);
         }
diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index 987e1a361e..543574e849 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -356,7 +356,7 @@ public function getCalculatedValue(bool $resetLog = true): mixed
                 $this->getWorksheet()->setSelectedCells($selected);
                 $this->getWorksheet()->getParentOrThrow()->setActiveSheetIndex($index);
                 //    We don't yet handle array returns
-                if (is_array($result)) {
+                if (is_array($result) && Calculation::getArrayReturnType() !== Calculation::RETURN_ARRAY_AS_ARRAY) {
                     while (is_array($result)) {
                         $result = array_shift($result);
                     }
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index a14ff28125..301d988ab6 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -1402,10 +1402,24 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
         }
 
         $attributes = $cell->getFormulaAttributes();
+        $ref = $cell->getCoordinate();
+        if (is_array($calculatedValue)) {
+            $attributes['t'] = 'array';
+            $rows = max(1, count($calculatedValue));
+            $cols = 1;
+            foreach ($calculatedValue as $row) {
+                $cols = max($cols, is_array($row) ? count($row) : 1);
+            }
+            $firstCellArray = Coordinate::indexesFromString($ref);
+            $lastRow = $firstCellArray[1] + $rows - 1;
+            $lastColumn = $firstCellArray[0] + $cols - 1;
+            $lastColumnString = Coordinate::stringFromColumnIndex($lastColumn);
+            $ref .= ":$lastColumnString$lastRow";
+        }
         if (($attributes['t'] ?? null) === 'array') {
             $objWriter->startElement('f');
             $objWriter->writeAttribute('t', 'array');
-            $objWriter->writeAttribute('ref', $cell->getCoordinate());
+            $objWriter->writeAttribute('ref', $ref);
             $objWriter->writeAttribute('aca', '1');
             $objWriter->writeAttribute('ca', '1');
             $objWriter->text(FunctionPrefix::addFunctionPrefixStripEquals($cellValue));
diff --git a/tests/PhpSpreadsheetTests/Worksheet/Table/Issue3659Test.php b/tests/PhpSpreadsheetTests/Worksheet/Table/Issue3659Test.php
index 3ec7c6bd5f..ff1108fe8d 100644
--- a/tests/PhpSpreadsheetTests/Worksheet/Table/Issue3659Test.php
+++ b/tests/PhpSpreadsheetTests/Worksheet/Table/Issue3659Test.php
@@ -4,10 +4,24 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Worksheet\Table;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Worksheet\Table;
 
 class Issue3659Test extends SetupTeardown
 {
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
     public function testTableOnOtherSheet(): void
     {
         $spreadsheet = $this->getSpreadsheet();
@@ -44,4 +58,51 @@ public function testTableOnOtherSheet(): void
         self::assertSame('F8', $tableSheet->getSelectedCells());
         self::assertSame($sheet, $spreadsheet->getActiveSheet());
     }
+
+    public function testTableAsArray(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = $this->getSpreadsheet();
+        $sheet = $this->getSheet();
+        $sheet->setTitle('Feuil1');
+        $tableSheet = $spreadsheet->createSheet();
+        $tableSheet->setTitle('sheet_with_table');
+        $tableSheet->fromArray(
+            [
+                ['MyCol', 'Colonne2', 'Colonne3'],
+                [10, 20],
+                [2],
+                [3],
+                [4],
+            ],
+            null,
+            'B1',
+            true
+        );
+        $table = new Table('B1:D5', 'Tableau1');
+        $tableSheet->addTable($table);
+        $sheet->setSelectedCells('F7');
+        $tableSheet->setSelectedCells('F8');
+        self::assertSame($sheet, $spreadsheet->getActiveSheet());
+        $sheet->getCell('F1')->setValue('=Tableau1[MyCol]');
+        $sheet->getCell('H1')->setValue('=Tableau1[]');
+        $sheet->getCell('F9')->setValue('=Tableau1');
+        $sheet->getCell('J9')->setValue('=CONCAT(Tableau1)');
+        $sheet->getCell('J11')->setValue('=SUM(Tableau1[])');
+        $expectedResult = [2 => ['B' => 10], ['B' => 2], ['B' => 3], ['B' => 4]];
+        self::assertSame($expectedResult, $sheet->getCell('F1')->getCalculatedValue());
+        $expectedResult = [
+            2 => ['B' => 10, 'C' => 20, 'D' => null],
+            ['B' => 2, 'C' => null, 'D' => null],
+            ['B' => 3, 'C' => null, 'D' => null],
+            ['B' => 4, 'C' => null, 'D' => null],
+        ];
+        self::assertSame($expectedResult, $sheet->getCell('H1')->getCalculatedValue());
+        self::assertSame($expectedResult, $sheet->getCell('F9')->getCalculatedValue());
+        self::assertSame('1020234', $sheet->getCell('J9')->getCalculatedValue(), 'Header row not included');
+        self::assertSame(39, $sheet->getCell('J11')->getCalculatedValue(), 'Header row not included');
+        self::assertSame('F7', $sheet->getSelectedCells());
+        self::assertSame('F8', $tableSheet->getSelectedCells());
+        self::assertSame($sheet, $spreadsheet->getActiveSheet());
+    }
 }
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
new file mode 100644
index 0000000000..39cc72ff72
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -0,0 +1,127 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Xlsx;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Reader\Xlsx as XlsxReader;
+use PhpOffice\PhpSpreadsheet\Shared\File;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Writer\Xlsx as XlsxWriter;
+use PHPUnit\Framework\TestCase;
+
+class ArrayFunctionsTest extends TestCase
+{
+    private string $arrayReturnType;
+
+    private string $outputFile = '';
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+        if ($this->outputFile !== '') {
+            unlink($this->outputFile);
+            $this->outputFile = '';
+        }
+    }
+
+    public function testArrayOutput(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $columnArray = [
+            [41],
+            [57],
+            [51],
+            [54],
+            [49],
+            [43],
+            [35],
+            [35],
+            [44],
+            [47],
+            [48],
+            [26],
+            [57],
+            [34],
+            [61],
+            [34],
+            [28],
+            [29],
+            [41],
+        ];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('C1', '=UNIQUE(A1:A19)');
+        $sheet->setCellValue('D1', '=SORT(A1:A19)');
+        $writer = new XlsxWriter($spreadsheet);
+        $this->outputFile = File::temporaryFilename();
+        $writer->save($this->outputFile);
+        $spreadsheet->disconnectWorksheets();
+
+        $reader = new XlsxReader();
+        $spreadsheet2 = $reader->load($this->outputFile);
+        $sheet2 = $spreadsheet2->getActiveSheet();
+        $expectedUnique = [
+            ['41'],
+            ['57'],
+            ['51'],
+            ['54'],
+            ['49'],
+            ['43'],
+            ['35'],
+            ['44'],
+            ['47'],
+            ['48'],
+            ['26'],
+            ['34'],
+            ['61'],
+            ['28'],
+            ['29'],
+        ];
+        self::assertCount(15, $expectedUnique);
+        self::assertSame($expectedUnique, $sheet2->getCell('C1')->getCalculatedValue());
+        $expectedSort = [
+            [26],
+            [28],
+            [29],
+            [34],
+            [34],
+            [35],
+            [35],
+            [41],
+            [41],
+            [43],
+            [44],
+            [47],
+            [48],
+            [49],
+            [51],
+            [54],
+            [57],
+            [57],
+            [61],
+        ];
+        self::assertCount(19, $expectedSort);
+        self::assertCount(19, $columnArray);
+        self::assertSame($expectedSort, $sheet2->getCell('D1')->getCalculatedValue());
+        $spreadsheet2->disconnectWorksheets();
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#xl/worksheets/sheet1.xml';
+        $data = file_get_contents($file);
+        if ($data === false) {
+            self::fail('Unable to read file');
+        } else {
+            self::assertStringContainsString('<c r="C1"><f t="array" ref="C1:C15" aca="1" ca="1">_xlfn.UNIQUE(A1:A19)</f></c>', $data, '15 results for UNIQUE');
+            self::assertStringContainsString('<c r="D1"><f t="array" ref="D1:D19" aca="1" ca="1">_xlfn._xlws.SORT(A1:A19)</f></c>', $data, '19 results for SORT');
+        }
+    }
+}

From b53a4b760246e07254a95103b6e11f1d6fb7619b Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Tue, 16 Apr 2024 19:45:13 -0700
Subject: [PATCH 02/31] Xlsx Reader Use Dimensions from Functions With Array
 Results

Thinking about #3958 - user wondered if unsupported formulas with array results could be handled better. I said that the answer was "no", but I think Xlsx Reader can make use of the dimensions of the result after all, so the answer is actually "sometimes". This is an initial attempt to do that. Implementing it revealed a bug in how Xlsx Reader handles array formula attributes, and that is now corrected. Likewise, Xlsx Writer did not indicate a value for the first cell in the array, and does now.
---
 src/PhpSpreadsheet/Reader/Xlsx.php            |  13 ++++--
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  |  15 ++++++-
 .../Writer/Xlsx/ArrayFunctionsTest.php        |  40 +++++++++++++++++-
 tests/data/Reader/XLSX/atsign.choosecols.xlsx | Bin 0 -> 9555 bytes
 4 files changed, 61 insertions(+), 7 deletions(-)
 create mode 100644 tests/data/Reader/XLSX/atsign.choosecols.xlsx

diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
index c8b2de2a9a..2daa2dc07c 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -891,9 +891,16 @@ protected function loadSpreadsheetFromFile(string $filename): Spreadsheet
                                                 } else {
                                                     // Formula
                                                     $this->castToFormula($c, $r, $cellDataType, $value, $calculatedValue, 'castToString');
-                                                    if (isset($c->f['t'])) {
-                                                        $attributes = $c->f['t'];
-                                                        $docSheet->getCell($r)->setFormulaAttributes(['t' => (string) $attributes]);
+                                                    $formulaAttributes = [];
+                                                    $attributes = $c->f->attributes();
+                                                    if (isset($attributes['t'])) {
+                                                        $formulaAttributes['t'] = (string) $attributes['t'];
+                                                    }
+                                                    if (isset($attributes['ref'])) {
+                                                        $formulaAttributes['ref'] = (string) $attributes['ref'];
+                                                    }
+                                                    if (!empty($formulaAttributes)) {
+                                                        $docSheet->getCell($r)->setFormulaAttributes($formulaAttributes);
                                                     }
                                                 }
 
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 301d988ab6..1b149c8330 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -1401,8 +1401,8 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
             $calculatedValue = (int) $calculatedValue;
         }
 
-        $attributes = $cell->getFormulaAttributes();
-        $ref = $cell->getCoordinate();
+        $attributes = $cell->getFormulaAttributes() ?? [];
+        $ref = array_key_exists('ref', $attributes) ? $attributes['ref'] : $cell->getCoordinate();
         if (is_array($calculatedValue)) {
             $attributes['t'] = 'array';
             $rows = max(1, count($calculatedValue));
@@ -1424,6 +1424,17 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
             $objWriter->writeAttribute('ca', '1');
             $objWriter->text(FunctionPrefix::addFunctionPrefixStripEquals($cellValue));
             $objWriter->endElement();
+            $result = $calculatedValue;
+            while (is_array($result)) {
+                $result = array_shift($result);
+            }
+            if (
+                is_scalar($result)
+                && $this->getParentWriter()->getOffice2003Compatibility() === false
+                && $this->getParentWriter()->getPreCalculateFormulas()
+            ) {
+                $objWriter->writeElement('v', (string) $result);
+            }
         } else {
             $objWriter->writeElement('f', FunctionPrefix::addFunctionPrefixStripEquals($cellValue));
             self::writeElementIf(
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index 39cc72ff72..fc26beb544 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -120,8 +120,44 @@ public function testArrayOutput(): void
         if ($data === false) {
             self::fail('Unable to read file');
         } else {
-            self::assertStringContainsString('<c r="C1"><f t="array" ref="C1:C15" aca="1" ca="1">_xlfn.UNIQUE(A1:A19)</f></c>', $data, '15 results for UNIQUE');
-            self::assertStringContainsString('<c r="D1"><f t="array" ref="D1:D19" aca="1" ca="1">_xlfn._xlws.SORT(A1:A19)</f></c>', $data, '19 results for SORT');
+            self::assertStringContainsString('<c r="C1"><f t="array" ref="C1:C15" aca="1" ca="1">_xlfn.UNIQUE(A1:A19)</f><v>41</v></c>', $data, '15 results for UNIQUE');
+            self::assertStringContainsString('<c r="D1"><f t="array" ref="D1:D19" aca="1" ca="1">_xlfn._xlws.SORT(A1:A19)</f><v>26</v></c>', $data, '19 results for SORT');
+        }
+    }
+
+    public function testUnimplementedArrayOutput(): void
+    {
+        //Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY); // not required for this test
+        $reader = new XlsxReader();
+        $spreadsheet = $reader->load('tests/data/Reader/XLSX/atsign.choosecols.xlsx');
+        $writer = new XlsxWriter($spreadsheet);
+        $this->outputFile = File::temporaryFilename();
+        $writer->save($this->outputFile);
+        $spreadsheet->disconnectWorksheets();
+
+        $reader = new XlsxReader();
+        $spreadsheet2 = $reader->load($this->outputFile);
+        $sheet2 = $spreadsheet2->getActiveSheet();
+        self::assertSame('=_xlfn.CHOOSECOLS(A1:C5,3,1)', $sheet2->getCell('F1')->getValue());
+        $expectedFG = [
+            ['11', '1'],
+            ['12', '2'],
+            ['13', '3'],
+            ['14', '4'],
+            ['15', '5'],
+        ];
+        $actualFG = $sheet2->rangeToArray('F1:G5');
+        self::assertSame($expectedFG, $actualFG);
+        $spreadsheet2->disconnectWorksheets();
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#xl/worksheets/sheet1.xml';
+        $data = file_get_contents($file);
+        if ($data === false) {
+            self::fail('Unable to read file');
+        } else {
+            self::assertStringContainsString('<f t="array" ref="F1:G5" aca="1" ca="1">_xlfn.CHOOSECOLS(A1:C5,3,1)</f><v>11</v>', $data);
         }
     }
 }
diff --git a/tests/data/Reader/XLSX/atsign.choosecols.xlsx b/tests/data/Reader/XLSX/atsign.choosecols.xlsx
new file mode 100644
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HcmV?d00001


From 61f24ca0991d57ec0dd822508792c817534fb36e Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Fri, 19 Apr 2024 00:04:27 -0700
Subject: [PATCH 03/31] Sample Submitted by @jr212

Address sample code submitted by @jr212 which was not working correctly.
---
 src/PhpSpreadsheet/Cell/Cell.php              | 12 +++++++
 .../Style/NumberFormat/Formatter.php          |  5 ++-
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  | 33 +++++++++++++++++--
 3 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index 543574e849..a6be2f8ce1 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -361,6 +361,18 @@ public function getCalculatedValue(bool $resetLog = true): mixed
                         $result = array_shift($result);
                     }
                 }
+                // if return_as_array for formula like '=sheet!cell'
+                if (is_array($result) && count($result) === 1) {
+                    $resultKey = array_keys($result)[0];
+                    $resultValue = $result[$resultKey];
+                    if (is_int($resultKey) && is_array($resultValue) && count($resultValue) === 1) {
+                        $resultKey2 = array_keys($resultValue)[0];
+                        $resultValue2 = $resultValue[$resultKey2];
+                        if (is_string($resultKey2) && !is_array($resultValue2) && preg_match('/[a-zA-Z]{1,3}/', $resultKey2) === 1) {
+                            $result = $resultValue2;
+                        }
+                    }
+                }
             } catch (SpreadsheetException $ex) {
                 if (($ex->getMessage() === 'Unable to access External Workbook') && ($this->calculatedValue !== null)) {
                     return $this->calculatedValue; // Fallback for calculations referencing external files.
diff --git a/src/PhpSpreadsheet/Style/NumberFormat/Formatter.php b/src/PhpSpreadsheet/Style/NumberFormat/Formatter.php
index 984aa174e7..c394a0ee26 100644
--- a/src/PhpSpreadsheet/Style/NumberFormat/Formatter.php
+++ b/src/PhpSpreadsheet/Style/NumberFormat/Formatter.php
@@ -107,7 +107,7 @@ private static function splitFormatForSectionSelection(array $sections, mixed $v
     /**
      * Convert a value in a pre-defined format to a PHP string.
      *
-     * @param null|bool|float|int|RichText|string $value Value to format
+     * @param null|array|bool|float|int|RichText|string $value Value to format
      * @param string $format Format code: see = self::FORMAT_* for predefined values;
      *                          or can be any valid MS Excel custom format string
      * @param ?array $callBack Callback function for additional formatting of string
@@ -116,6 +116,9 @@ private static function splitFormatForSectionSelection(array $sections, mixed $v
      */
     public static function toFormattedString($value, string $format, ?array $callBack = null): string
     {
+        while (is_array($value)) {
+            $value = array_shift($value);
+        }
         if (is_bool($value)) {
             return $value ? Calculation::getTRUE() : Calculation::getFALSE();
         }
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 1b149c8330..56efed67d5 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -1402,7 +1402,12 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
         }
 
         $attributes = $cell->getFormulaAttributes() ?? [];
-        $ref = array_key_exists('ref', $attributes) ? $attributes['ref'] : $cell->getCoordinate();
+        $coordinate = $cell->getCoordinate();
+        if (isset($attributes['ref'])) {
+            $ref = $this->parseRef($coordinate, $attributes['ref']);
+        } else {
+            $ref = $coordinate;
+        }
         if (is_array($calculatedValue)) {
             $attributes['t'] = 'array';
             $rows = max(1, count($calculatedValue));
@@ -1410,11 +1415,11 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
             foreach ($calculatedValue as $row) {
                 $cols = max($cols, is_array($row) ? count($row) : 1);
             }
-            $firstCellArray = Coordinate::indexesFromString($ref);
+            $firstCellArray = Coordinate::indexesFromString($coordinate);
             $lastRow = $firstCellArray[1] + $rows - 1;
             $lastColumn = $firstCellArray[0] + $cols - 1;
             $lastColumnString = Coordinate::stringFromColumnIndex($lastColumn);
-            $ref .= ":$lastColumnString$lastRow";
+            $ref = "$coordinate:$lastColumnString$lastRow";
         }
         if (($attributes['t'] ?? null) === 'array') {
             $objWriter->startElement('f');
@@ -1449,6 +1454,28 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
         }
     }
 
+    private function parseRef(string $coordinate, string $ref): string
+    {
+        if (preg_match('/^([A-Z]{1,3})([0-9]{1,7})(:([A-Z]{1,3})([0-9]{1,7}))?$/', $ref, $matches) !== 1) {
+            return $ref;
+        }
+        if (!isset($matches[3])) { // single cell, not range
+            return $coordinate;
+        }
+        $minRow = (int) $matches[2];
+        $maxRow = (int) $matches[5];
+        $rows = $maxRow - $minRow + 1;
+        $minCol = Coordinate::columnIndexFromString($matches[1]);
+        $maxCol = Coordinate::columnIndexFromString($matches[4]);
+        $cols = $maxCol - $minCol + 1;
+        $firstCellArray = Coordinate::indexesFromString($coordinate);
+        $lastRow = $firstCellArray[1] + $rows - 1;
+        $lastColumn = $firstCellArray[0] + $cols - 1;
+        $lastColumnString = Coordinate::stringFromColumnIndex($lastColumn);
+
+        return "$coordinate:$lastColumnString$lastRow";
+    }
+
     /**
      * Write Cell.
      *

From 08ba00b57598b6af272c320d31ef2e68af998edc Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 6 Jun 2024 06:52:14 -0700
Subject: [PATCH 04/31] Populate Rest of Array Cells, UNIQUE Changes

See issue #4062. When calculating an array formula, populate all the cells associated with the result. This is almost the same as Excel's behavior. As yet, there is no attempt to create a #SPILL error, so cells may be inappropriately overwritten. Also, if the array size shrinks (e.g. there are fewer unique values than before),  no attempt is made to unpopulate the cells which were in range but are now outside the new dimensions. Spill and unpopulation are somewhat related, and will probably be handled at the same time, but their time has not yet come.

UNIQUE, at least for rows, was treating all cell (calculated) values as strings. This is not the same behavior as Excel, which will preserve datatypes, and treat int 3 and string 3 as unique values. Excel will, however, treat int 3 and float 3.0 as non-unique. Within UNIQUE, private function uniqueByRow is changed to try to preserve the the datatype when executing (it will probably treat 3.0 as int - I don't know how I can, or even if I should attempt to, do better - but no int nor float should be treated as a string).
---
 .../Calculation/LookupRef/Unique.php          |  21 +-
 src/PhpSpreadsheet/Cell/Cell.php              |  16 +
 .../Functions/LookupRef/UniqueTest.php        |  11 +-
 .../Writer/Xlsx/ArrayFunctions2Test.php       | 307 ++++++++++++++++++
 .../Writer/Xlsx/ArrayFunctionsTest.php        |  76 ++++-
 tests/data/Writer/XLSX/ArrayFunctions2.json   |   1 +
 6 files changed, 411 insertions(+), 21 deletions(-)
 create mode 100644 tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
 create mode 100644 tests/data/Writer/XLSX/ArrayFunctions2.json

diff --git a/src/PhpSpreadsheet/Calculation/LookupRef/Unique.php b/src/PhpSpreadsheet/Calculation/LookupRef/Unique.php
index 220be2d131..103520ed27 100644
--- a/src/PhpSpreadsheet/Calculation/LookupRef/Unique.php
+++ b/src/PhpSpreadsheet/Calculation/LookupRef/Unique.php
@@ -40,7 +40,17 @@ private static function uniqueByRow(array $lookupVector, bool $exactlyOnce): mix
         array_walk(
             $lookupVector,
             function (array &$value): void {
-                $value = implode(chr(0x00), $value);
+                $valuex = '';
+                $separator = '';
+                $numericIndicator = "\x01";
+                foreach ($value as $cellValue) {
+                    $valuex .= $separator . $cellValue;
+                    $separator = "\x00";
+                    if (is_int($cellValue) || is_float($cellValue)) {
+                        $valuex .= $numericIndicator;
+                    }
+                }
+                $value = $valuex;
             }
         );
 
@@ -60,7 +70,14 @@ function (array &$value): void {
         array_walk(
             $result,
             function (string &$value): void {
-                $value = explode(chr(0x00), $value);
+                $value = explode("\x00", $value);
+                foreach ($value as &$stringValue) {
+                    if (str_ends_with($stringValue, "\x01")) {
+                        // x01 should only end a string which is otherwise a float or int,
+                        // so phpstan is technically correct but what it fears should not happen.
+                        $stringValue = 0 + substr($stringValue, 0, -1); //@phpstan-ignore-line
+                    }
+                }
             }
         );
 
diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index 2d225ad642..ffc8641082 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -390,6 +390,22 @@ public function getCalculatedValue(bool $resetLog = true): mixed
                         }
                     }
                 }
+                if (is_array($result)) {
+                    $newRow = $row = $this->getRow();
+                    $column = $this->getColumn();
+                    foreach ($result as $resultRow) {
+                        $newColumn = $column;
+                        $resultRowx = is_array($resultRow) ? $resultRow : [$resultRow];
+                        foreach ($resultRowx as $resultValue) {
+                            if ($row !== $newRow || $column !== $newColumn) {
+                                $this->getWorksheet()->getCell($newColumn . $newRow)->setValue($resultValue);
+                            }
+                            ++$newColumn;
+                        }
+                        ++$newRow;
+                    }
+                    $this->getWorksheet()->getCell($column . $row);
+                }
             } catch (SpreadsheetException $ex) {
                 if (($ex->getMessage() === 'Unable to access External Workbook') && ($this->calculatedValue !== null)) {
                     return $this->calculatedValue; // Fallback for calculations referencing external files.
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/LookupRef/UniqueTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/LookupRef/UniqueTest.php
index 718fe2b8b0..c7996ea2a6 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/LookupRef/UniqueTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/LookupRef/UniqueTest.php
@@ -16,7 +16,7 @@ class UniqueTest extends TestCase
     public function testUnique(array $expectedResult, array $lookupRef, bool $byColumn = false, bool $exactlyOnce = false): void
     {
         $result = LookupRef\Unique::unique($lookupRef, $byColumn, $exactlyOnce);
-        self::assertEquals($expectedResult, $result);
+        self::assertSame($expectedResult, $result);
     }
 
     public function testUniqueException(): void
@@ -36,10 +36,10 @@ public function testUniqueException(): void
         ];
 
         $result = LookupRef\Unique::unique($rowLookupData, false, true);
-        self::assertEquals(ExcelError::CALC(), $result);
+        self::assertSame(ExcelError::CALC(), $result);
 
         $result = LookupRef\Unique::unique($columnLookupData, true, true);
-        self::assertEquals(ExcelError::CALC(), $result);
+        self::assertSame(ExcelError::CALC(), $result);
     }
 
     public function testUniqueWithScalar(): void
@@ -145,13 +145,16 @@ public static function uniqueTestProvider(): array
                 ],
             ],
             [
-                [[1.2], [2.1], [2.2], [3.0]],
+                [[1.2], [2.1], [2.2], [3], ['3'], [8.7]],
                 [
                     [1.2],
                     [1.2],
                     [2.1],
                     [2.2],
                     [3.0],
+                    [3],
+                    ['3'],
+                    [8.7],
                 ],
             ],
         ];
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
new file mode 100644
index 0000000000..719215846e
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
@@ -0,0 +1,307 @@
+<?php
+
+// not yet ready for prime time
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Xlsx;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Cell\DataValidation;
+use PhpOffice\PhpSpreadsheet\NamedRange;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
+use PhpOffice\PhpSpreadsheet\Style\Border;
+use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
+use PHPUnit\Framework\TestCase;
+
+class ArrayFunctions2Test extends TestCase
+{
+    private const STYLESIZE14 = [
+        'font' => [
+            'size' => 14,
+        ],
+    ];
+    private const STYLEBOLD = [
+        'font' => [
+            'bold' => true,
+        ],
+    ];
+    private const STYLEBOLD14 = [
+        'font' => [
+            'bold' => true,
+            'size' => 14,
+        ],
+    ];
+    private const STYLECENTER = [
+        'alignment' => [
+            'horizontal' => Alignment::HORIZONTAL_CENTER,
+        ],
+    ];
+
+    private const STYLETHICKBORDER = [
+        'borders' => [
+            'outline' => [
+                'borderStyle' => Border::BORDER_THICK,
+                'color' => ['argb' => '00000000'],
+            ],
+        ],
+    ];
+
+    private array $trn;
+
+    private string $arrayReturnType;
+
+    private string $outputFile = '';
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+        if ($this->outputFile !== '') {
+            unlink($this->outputFile);
+            $this->outputFile = '';
+        }
+    }
+
+    private function odd(int $i): bool
+    {
+        return ($i % 2) === 1;
+    }
+
+    private function doPartijen(Worksheet $ws): int
+    {
+        $saring = explode("\n", $this->trn['PARINGEN']);
+        $s = $this->trn['PLAYERSNOID'];
+        $g = $this->trn['RONDEGAMES'];
+        $KD = $this->trn['KALENDERDATA'];
+        $si = $this->trn['PLAYERSIDS'];
+
+        $a = [
+            ['Wit', null, null, null, 'Zwart', null, null, null, 'Wit', 'Uitslag', 'Zwart', 'Opmerking', 'Datum'],
+            ['Winstpunten', 'Weerstandspunten', 'punten', 'Tegenpunten', 'Winstpunten', 'Weerstandspunten', 'punten', 'Tegenpunten'],
+
+        ];
+        $ws->fromArray($a, null, 'A1');
+
+        $ws->getStyle('A1:L1')->applyFromArray(self::STYLEBOLD);
+        $ws->getStyle('A1:L1')->applyFromArray(self::STYLESIZE14);
+
+        $lijn = 1;
+        for ($i = 1; $i <= $this->trn['RONDEN']; ++$i) {//aantal ronden oneven->heen en even->terug
+            for ($j = 0; $j < count($saring); ++$j) {//subronden
+                ++$lijn;
+                if (isset($KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j], $KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j]['RONDE'])) {
+                    $ws->setCellValue([9, $lijn], $KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j]['RONDE']);
+                } else {
+                    $ws->setCellValue([9, $lijn], 'Kalenderdata zijn niet(volledig) ingevuld');
+                }
+                if (isset($KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j], $KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j]['TXT'])) {
+                    $ws->setCellValue([10, $lijn], $KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j]['TXT']);
+                } else {
+                    $ws->setCellValue([10, $lijn], 'Kalenderdata zijn niet(volledig) ingevuld');
+                }
+
+                $ws->getStyle('A' . $lijn . ':L' . $lijn . '')->applyFromArray(self::STYLEBOLD14);
+
+                $s2 = explode(' ', $saring[$j]);
+                for ($k = 0; $k < count($s2); ++$k) {//borden
+                    if (trim($s2[$k]) == '') {
+                        continue;
+                    }
+                    $s3 = explode('-', $s2[$k]); //wit-zwart
+                    $s3[0] = (int) $s3[0];
+                    $s3[1] = (int) $s3[1];
+                    ++$lijn;
+                    $ws->setCellValue([1, $lijn], '=IF(SUBSTITUTE(TRIM($J' . $lijn . '),"-","")="","",XLOOKUP($K' . $lijn . ',Spelers!$B$2:$B$' . (count($s) + 1) . ',Spelers!$C$2:$C$' . (count($s) + 1) . ',FALSE) * VLOOKUP(J' . $lijn . ', PuntenLijst,4,FALSE))');
+                    $ws->setCellValue([2, $lijn], '=IF(SUBSTITUTE(TRIM($J' . $lijn . '),"-","")="","",VLOOKUP($K' . $lijn . ',Spelers!$B$2:$D$' . (count($s) + 1) . ',3,FALSE) * VLOOKUP(J' . $lijn . ', PuntenLijst,5,FALSE))');
+                    $ws->setCellValue([3, $lijn], '=IF(TRIM($J' . $lijn . ')="","",XLOOKUP($J' . $lijn . ', Punten!$A$2:$A$50,Punten!$B$2:$B$50,0,0))');
+                    $ws->setCellValue([4, $lijn], '=IF(TRIM($J' . $lijn . ')="","",XLOOKUP($J' . $lijn . ', Punten!$A$2:$A$50,Punten!$G$2:$G$50,0,0))');
+
+                    $ws->setCellValue([5, $lijn], '=IF(SUBSTITUTE(TRIM($J' . $lijn . '),"-","")="","",VLOOKUP($I' . $lijn . ',Spelers!$B$2:$D$' . (count($s) + 1) . ',3,FALSE) * VLOOKUP(J' . $lijn . ', PuntenLijst,6,FALSE))');
+                    $ws->setCellValue([6, $lijn], '=IF(SUBSTITUTE(TRIM($J' . $lijn . '),"-","")="","",VLOOKUP($I' . $lijn . ',Spelers!$B$2:$D$' . (count($s) + 1) . ',3,FALSE) * VLOOKUP(J' . $lijn . ', PuntenLijst,5,FALSE))');
+                    $ws->setCellValue([7, $lijn], '=IF(TRIM($J' . $lijn . ')="","",XLOOKUP($J' . $lijn . ', Punten!$A$2:$A$50,Punten!$C$2:$C$50,0,0))');
+                    $ws->setCellValue([8, $lijn], '=IF(TRIM($J' . $lijn . ')="","",XLOOKUP($J' . $lijn . ', Punten!$A$2:$A$50,Punten!$H$2:$H$50,0,0))');
+
+                    if ($this->odd($i)) {
+                        if (
+                            isset($g[$i][$si[((int) $s3[0]) - 1]][$si[((int) $s3[1]) - 1]])
+                        ) {
+                            $pw = $g[$i][$si[((int) $s3[0]) - 1]][$si[((int) $s3[1]) - 1]];
+                        } else {
+                            $pw = ['SYMBOOLWIT' => '', 'SYMBOOLZWART' => '', 'UITSLAG' => '', 'OPMERKING' => '', 'DATUM' => ''];
+                        }
+                        $ws->setCellValue([9, $lijn], '=Spelers!$B$' . ($s3[0] + 1));
+                        $ws->setCellValue([11, $lijn], '=Spelers!$B$' . ($s3[1] + 1));
+                    } else {
+                        if (
+                            isset($g[$i][$si[((int) $s3[1]) - 1]][$si[((int) $s3[0]) - 1]])
+                        ) {
+                            $pw = $g[$i][$si[((int) $s3[1]) - 1]][$si[((int) $s3[0]) - 1]];
+                        } else {
+                            $pw = ['SYMBOOLWIT' => '', 'SYMBOOLZWART' => '', 'UITSLAG' => '', 'OPMERKING' => '', 'DATUM' => ''];
+                        }
+                        $ws->setCellValue([9, $lijn], '=Spelers!$B$' . ($s3[1] + 1));
+                        $ws->setCellValue([11, $lijn], '=Spelers!$B$' . ($s3[0] + 1));
+                    }
+                    if ($pw['SYMBOOLWIT'] != '') {
+                        $ws->setCellValue([10, $lijn], $pw['SYMBOOLWIT'] . '-' . $pw['SYMBOOLZWART']);
+                    }
+                    $ws->setCellValue([13, $lijn], $pw['OPMERKING']);
+                    $ws->setCellValue([14, $lijn], $pw['DATUM']);
+
+                    $this->doValidationPunten($ws, 'J' . $lijn);
+
+                    $ws->getRowDimension($lijn)->setOutlineLevel(1);
+                }
+                ++$lijn;
+            }
+            ++$lijn;
+        }
+        $ws->getStyle('J1:J' . $lijn)->applyFromArray(self::STYLECENTER);
+
+        $ws->getColumnDimension('A')->setVisible(false);
+        $ws->getColumnDimension('B')->setVisible(false);
+        $ws->getColumnDimension('C')->setVisible(false);
+        $ws->getColumnDimension('D')->setVisible(false);
+        $ws->getColumnDimension('E')->setVisible(false);
+        $ws->getColumnDimension('F')->setVisible(false);
+        $ws->getColumnDimension('G')->setVisible(false);
+        $ws->getColumnDimension('H')->setVisible(false);
+
+        for ($i = 65; $i < ord('M'); ++$i) {
+            $ws->getColumnDimension(chr($i))->setAutoSize(true);
+        }
+        $ws->setAutoFilter('A2:M' . $lijn);
+        $ws->setSelectedCell('A1');
+
+        return $lijn;
+    }
+
+    private function doValidationPunten(Worksheet $s, string $cel): void
+    {
+        $validation = $s->getCell($cel)->getDataValidation();
+        $validation->setType(DataValidation::TYPE_LIST);
+        $validation->setErrorStyle(DataValidation::STYLE_STOP);
+        $validation->setAllowBlank(false);
+        $validation->setShowInputMessage(false);
+        $validation->setShowErrorMessage(true);
+        $validation->setShowDropDown(true);
+        $validation->setFormula1('=punten');
+    }
+
+    private function doPunten(Spreadsheet $ss, Worksheet $ws): void
+    {
+        $ws->fromArray(['Uitslag', 'Wit', 'Zwart', 'Winstverhouding WIT', 'Weerstandverhouding', 'Winstverhouding ZWART', 'Tegenpunten Wit', 'Tegenpunten Zwart'], null, 'A1');
+        $ws->fromArray(['0-3', '0', '3', '0', '1', '1', '0', '0'], null, 'A2');
+        $ws->fromArray(['1-3', '1', '3', '0', '1', '1', '0', '-1'], null, 'A3');
+        $ws->fromArray(['2-3', '2', '3', '0', '1', '1', '0', '-2'], null, 'A4');
+        $ws->fromArray(['3-0', '3', '0', '1', '1', '0', '0', '0'], null, 'A5');
+        $ws->fromArray(['3-1', '3', '1', '1', '1', '0', '-1', '0'], null, 'A6');
+        $ws->fromArray(['3-2', '3', '2', '1', '1', '0', '-2', '0'], null, 'A7');
+        $ws->fromArray(['U-U', '0', '0', '0', '0', '0', '0', '0'], null, 'A8');
+
+        $ss->addNamedRange(new NamedRange('Punten', $ws, '=$A$2:$A$8'));
+        $ss->addNamedRange(new NamedRange('PuntenLijst', $ws, '=$A$2:$H$8'));
+
+        $ws->getStyle('A1:H1')->applyFromArray(self::STYLETHICKBORDER);
+        $ws->getStyle('A1:A8')->applyFromArray(self::STYLETHICKBORDER);
+        $ws->getStyle('B2:H8')->applyFromArray(self::STYLETHICKBORDER);
+
+        for ($i = 65; $i < ord('I'); ++$i) {
+            $ws->getColumnDimension(chr($i))->setAutoSize(true);
+        }
+        $ws->setSelectedCell('A1');
+    }
+
+    private function doSpelers(Worksheet $ws, int $maxLijn): void
+    {
+        $this->doKoppen($ws);
+
+        $i = 1;
+        foreach ($this->trn['SPELERS'] as $speler) {
+            $ws->setCellValue([1, ++$i], '=RANK(D' . $i . ',$D$2:$D$' . (count($this->trn['SPELERS']) + 1) . ',0)-1+COUNTIF($D$2:D' . $i . ',D' . $i . ')');
+            $ws->setCellValue([2, $i], $speler);
+            $ws->setCellValue([3, $i], '=COUNTIFS(Partijen!$I$3:$I$' . $maxLijn . ',$B' . $i . ',Partijen!$J$3:$J$' . $maxLijn . ',"<>")+COUNTIFS(Partijen!$K$3:$K$' . $maxLijn . ',Spelers!$B' . $i . ',Partijen!$J$3:$J$' . $maxLijn . ',"<>")'); // - SUM(H' . $i . ':I' . $i . ')
+            $ws->setCellValue([4, $i], '=SUMIFS(Partijen!C$3:C$' . $maxLijn . ',Partijen!$I$3:$I$' . $maxLijn . ',$B' . $i . ')+SUMIFS(Partijen!G$3:G$' . $maxLijn . ',Partijen!$K$3:$K$' . $maxLijn . ',$B' . $i . ')');
+            $ws->setCellValue([5, $i], '=SUMIFS(Partijen!D$3:D$' . $maxLijn . ',Partijen!$I$3:$I$' . $maxLijn . ',$B' . $i . ')+SUMIFS(Partijen!H$3:H$' . $maxLijn . ',Partijen!$K$3:$K$' . $maxLijn . ',$B' . $i . ')');
+            $ws->setCellValue([6, $i], '=SUMIFS(Partijen!A$3:A$' . $maxLijn . ',Partijen!$I$3:$I$' . $maxLijn . ',$B' . $i . ')+SUMIFS(Partijen!E$3:E$' . $maxLijn . ',Partijen!$K$3:$K$' . $maxLijn . ',$B' . $i . ')');
+            $ws->setCellValue([7, $i], '=SUMIFS(Partijen!B$3:B$' . $maxLijn . ',Partijen!$I$3:$I$' . $maxLijn . ',$B' . $i . ')+SUMIFS(Partijen!F$3:F$' . $maxLijn . ',Partijen!$K$3:$K$' . $maxLijn . ',$B' . $i . ')');
+            $ws->setCellValue([8, $i], '=C' . $i . '*MAX(Punten!$B$2:$B$50)-D' . $i . '');
+        }
+        $ws->setSelectedCell('A1');
+    }
+
+    private function doSort1(Worksheet $ws): void
+    {
+        $ws->setCellValue('A2', '=FILTER(SORTBY(Spelers!A2:H101,Spelers!D2:D101,-1,Spelers!E2:E101,1),(Spelers!B2:B101<>"Bye")*(NOT(ISBLANK(Spelers!B2:B101))))');
+        $this->doKoppen($ws);
+        $ws->setSelectedCell('A1');
+    }
+
+    private function doSort2(Worksheet $ws): void
+    {
+        $ws->setCellValue('A2', '=SORT(FILTER(Spelers!A2:H101,(Spelers!B2:B101<>"Bye") * (NOT(ISBLANK(Spelers!B2:B101)))),7,1,FALSE)');
+        $this->doKoppen($ws);
+        $ws->setSelectedCell('A1');
+    }
+
+    private function doKoppen(Worksheet $ws): void
+    {
+        $ws->setCellValue('A1', 'Plaats');
+        $ws->setCellValue('B1', 'Naam');
+        $ws->setCellValue('C1', 'Partijen');
+        $ws->setCellValue('D1', 'Punten');
+        $ws->setCellValue('E1', 'Tegenpunten');
+        $ws->setCellValue('F1', 'Winstpunten');
+        $ws->setCellValue('G1', 'Weerstandspunten');
+        $ws->setCellValue('H1', 'Verlorenpunten');
+
+        for ($i = 65; $i < ord('I'); ++$i) {
+            $ws->getColumnDimension(chr($i))->setAutoSize(true);
+        }
+
+        $ws->getStyle('A1:H1')->applyFromArray(self::STYLEBOLD);
+    }
+
+    public function testManyArraysOutput(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $json = file_get_contents('tests/data/Writer/Xlsx/ArrayFunctions2.json');
+        self::assertNotFalse($json);
+        $this->trn = json_decode($json, true);
+        $spreadsheet = new Spreadsheet();
+
+        $wsPartijen = $spreadsheet->getActiveSheet();
+        $wsPartijen->setTitle('Partijen');
+        $wsPunten = new Worksheet($spreadsheet, 'Punten');
+        $wsSpelers = new Worksheet($spreadsheet, 'Spelers');
+        $wsSort1 = new Worksheet($spreadsheet, 'Gesorteerd punten');
+        $wsSort2 = new Worksheet($spreadsheet, 'Gesorteerd verlorenpunten');
+
+        $wsPartijen->getTabColor()->setRGB('FF0000');
+        $wsPunten->getTabColor()->setRGB('00FF00');
+        $wsSpelers->getTabColor()->setRGB('0000FF');
+        $wsSort1->getTabColor()->setRGB('FFFF00');
+        $wsSort2->getTabColor()->setRGB('00FFFF');
+
+        foreach ([$wsPunten, $wsSpelers, $wsSort1, $wsSort2] as $ws) {
+            $spreadsheet->addSheet($ws);
+        }
+
+        $this->doPunten($spreadsheet, $wsPunten);
+        $maxLijn = $this->doPartijen($wsPartijen);
+        $this->doSpelers($wsSpelers, $maxLijn);
+        $this->doSort1($wsSort1);
+        $this->doSort2($wsSort2);
+
+        self::assertSame('Dirk', $wsPartijen->getCell('I3')->getCalculatedValue());
+        self::assertSame('Rudy', $wsPartijen->getCell('K4')->getCalculatedValue());
+        $calcArray = $wsSort2->getCell('A2')->getCalculatedValue();
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index fc26beb544..984528f3e7 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -69,24 +69,27 @@ public function testArrayOutput(): void
         $spreadsheet2 = $reader->load($this->outputFile);
         $sheet2 = $spreadsheet2->getActiveSheet();
         $expectedUnique = [
-            ['41'],
-            ['57'],
-            ['51'],
-            ['54'],
-            ['49'],
-            ['43'],
-            ['35'],
-            ['44'],
-            ['47'],
-            ['48'],
-            ['26'],
-            ['34'],
-            ['61'],
-            ['28'],
-            ['29'],
+            [41],
+            [57],
+            [51],
+            [54],
+            [49],
+            [43],
+            [35],
+            [44],
+            [47],
+            [48],
+            [26],
+            [34],
+            [61],
+            [28],
+            [29],
         ];
         self::assertCount(15, $expectedUnique);
         self::assertSame($expectedUnique, $sheet2->getCell('C1')->getCalculatedValue());
+        for ($row = 2; $row <= 15; ++$row) {
+            self::assertSame($expectedUnique[$row - 1][0], $sheet2->getCell("C$row")->getCalculatedValue(), "cell C$row");
+        }
         $expectedSort = [
             [26],
             [28],
@@ -160,4 +163,47 @@ public function testUnimplementedArrayOutput(): void
             self::assertStringContainsString('<f t="array" ref="F1:G5" aca="1" ca="1">_xlfn.CHOOSECOLS(A1:C5,3,1)</f><v>11</v>', $data);
         }
     }
+
+    public function testArrayMultipleColumns(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $columnArray = [
+            [100, 91],
+            [85, 1],
+            [100, 92],
+            [734, 12],
+            [100, 91],
+            [5,2],
+        ];
+        $sheet->fromArray($columnArray);
+        $sheet->setCellValue('H1', '=UNIQUE(A1:B6)');
+        $writer = new XlsxWriter($spreadsheet);
+        $this->outputFile = File::temporaryFilename();
+        $writer->save($this->outputFile);
+        $spreadsheet->disconnectWorksheets();
+
+        $reader = new XlsxReader();
+        $spreadsheet2 = $reader->load($this->outputFile);
+        $sheet2 = $spreadsheet2->getActiveSheet();
+        $expectedUnique = [
+            [100, 91],
+            [85, 1],
+            [100, 92],
+            [734, 12],
+            //[100, 91], // not unique
+            [5,2],
+        ];
+        self::assertCount(5, $expectedUnique);
+        self::assertSame($expectedUnique, $sheet2->getCell('H1')->getCalculatedValue());
+        for ($row = 1; $row <= 5; ++$row) {
+            if ($row > 1) {
+                self::assertSame($expectedUnique[$row - 1][0], $sheet2->getCell("H$row")->getCalculatedValue(), "cell H$row");
+            }
+            self::assertSame($expectedUnique[$row - 1][1], $sheet2->getCell("I$row")->getCalculatedValue(), "cell I$row");
+        }
+        $spreadsheet2->disconnectWorksheets();
+    }
+
 }
diff --git a/tests/data/Writer/XLSX/ArrayFunctions2.json b/tests/data/Writer/XLSX/ArrayFunctions2.json
new file mode 100644
index 0000000000..7f3e12a68d
--- /dev/null
+++ b/tests/data/Writer/XLSX/ArrayFunctions2.json
@@ -0,0 +1 @@
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21:14:36","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"2","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":4},"872":{"ID":"5167","WIT":"Casper","ZWART":"Wouter","UITSLAG":"35","DATUM":"2023-12-08","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-01-24 11:28:54","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Verloren","CLASSE_ZWART":"Gewonnen","SYMBOOLWIT":"0","SYMBOOLZWART":"3","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":2},"873":{"ID":"5163","WIT":"Casper","ZWART":"Rudy","UITSLAG":"40","DATUM":"2023-12-29","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-01-24 11:28:53","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"2","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":1}},"870":{"868":{"ID":"5173","WIT":"Jan","ZWART":"Dirk","UITSLAG":"38","DATUM":"2024-01-12","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-01-24 11:28:55","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"0","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":3},"869":{"ID":"5175","WIT":"Jan","ZWART":"Casper","UITSLAG":"38","DATUM":"2023-12-08","UITSTELLER":"0","METHODE":"volgenderonden","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-01-24 11:30:25","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"0","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":6},"874":{"ID":"5165","WIT":"Jan","ZWART":"Bob","UITSLAG":"38","DATUM":"2023-11-17","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-01-24 11:28:54","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"0","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":1}},"871":{"868":{"ID":"5265","WIT":"Liam","ZWART":"Dirk","UITSLAG":"39","DATUM":"2024-03-15","UITSTELLER":"2","METHODE":"volgenderondenactievetoernooien","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-03-15 21:30:00","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"1","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":5},"870":{"ID":"5170","WIT":"Liam","ZWART":"Jan","UITSLAG":"35","DATUM":"2023-12-08","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-01-24 11:28:55","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Verloren","CLASSE_ZWART":"Gewonnen","SYMBOOLWIT":"0","SYMBOOLZWART":"3","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":2},"873":{"ID":"5174","WIT":"Liam","ZWART":"Rudy","UITSLAG":"39","DATUM":"2024-01-12","UITSTELLER":"0","METHODE":"kruistabel","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-03-01 20:23:11","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"1","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":3},"875":{"ID":"5166","WIT":"Liam","ZWART":"Gilles","UITSLAG":"37","DATUM":"2023-11-17","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-01-24 11:28:54","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Verloren","CLASSE_ZWART":"Gewonnen","SYMBOOLWIT":"2","SYMBOOLZWART":"3","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":1}},"872":{"870":{"ID":"5216","WIT":"Wouter","ZWART":"Jan","UITSLAG":"35","DATUM":"2024-02-09","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-02-09 21:09:57","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Verloren","CLASSE_ZWART":"Gewonnen","SYMBOOLWIT":"0","SYMBOOLZWART":"3","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":4},"875":{"ID":"5270","WIT":"Wouter","ZWART":"Gilles","UITSLAG":"40","DATUM":"2024-03-08","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-03-08 21:42:25","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"2","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":5}},"873":{"870":{"ID":"5269","WIT":"Rudy","ZWART":"Jan","UITSLAG":"35","DATUM":"2024-03-08","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-03-08 21:08:28","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Verloren","CLASSE_ZWART":"Gewonnen","SYMBOOLWIT":"0","SYMBOOLZWART":"3","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":5},"875":{"ID":"5215","WIT":"Rudy","ZWART":"Gilles","UITSLAG":"35","DATUM":"2024-02-09","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-02-09 21:09:56","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Verloren","CLASSE_ZWART":"Gewonnen","SYMBOOLWIT":"0","SYMBOOLZWART":"3","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":4}},"874":{"869":{"ID":"5271","WIT":"Bob","ZWART":"Casper","UITSLAG":"38","DATUM":"2024-03-08","UITSTELLER":"0","METHODE":"kalender","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-03-08 21:53:48","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Gewonnen","CLASSE_ZWART":"Verloren","SYMBOOLWIT":"3","SYMBOOLZWART":"0","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":5},"872":{"ID":"5171","WIT":"Bob","ZWART":"Wouter","UITSLAG":"36","DATUM":"2024-03-01","UITSTELLER":"0","METHODE":"kruistabel","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-03-01 20:27:04","OPMERKING":"","READONLY":"0","CLASSE_WIT":"Verloren","CLASSE_ZWART":"Gewonnen","SYMBOOLWIT":"1","SYMBOOLZWART":"3","NOTATION":{"NOTATION":null,"DOOR":null,"DATUM":null,"IP":null},"COMMENT":{"COMMENT":null,"W_B":null,"DOOR":null,"DATUM":null,"IP":null},"RONDENR":"1","RONDE":3}},"875":{"869":{"ID":"5172","WIT":"Gilles","ZWART":"Casper","UITSLAG":"39","DATUM":"2024-01-12","UITSTELLER":"0","METHODE":"gamesplayedNextgames","INGEBRACHTDOOR":"Jan","CHANGEDATE":"2024-01-24 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From 856a00b8f09cc5c89aaa3f74f35e994062c34203 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 6 Jun 2024 06:55:33 -0700
Subject: [PATCH 05/31] Formatting

---
 tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index 984528f3e7..51f6b74776 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -205,5 +205,4 @@ public function testArrayMultipleColumns(): void
         }
         $spreadsheet2->disconnectWorksheets();
     }
-
 }

From 1b2198419e733efd30e808cb70fb95be0630c06b Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 6 Jun 2024 07:01:45 -0700
Subject: [PATCH 06/31] Incorrect Case for Filename

---
 tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
index 719215846e..0eded54202 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
@@ -271,7 +271,7 @@ private function doKoppen(Worksheet $ws): void
     public function testManyArraysOutput(): void
     {
         Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
-        $json = file_get_contents('tests/data/Writer/Xlsx/ArrayFunctions2.json');
+        $json = file_get_contents('tests/data/Writer/XLSX/ArrayFunctions2.json');
         self::assertNotFalse($json);
         $this->trn = json_decode($json, true);
         $spreadsheet = new Spreadsheet();

From 47481c6a12329f63775a86cb716645b9a6051d87 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 6 Jun 2024 07:05:19 -0700
Subject: [PATCH 07/31] More Formatting

Frustrating morning.
---
 tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index 51f6b74776..788f7ec4be 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -193,7 +193,7 @@ public function testArrayMultipleColumns(): void
             [100, 92],
             [734, 12],
             //[100, 91], // not unique
-            [5,2],
+            [5, 2],
         ];
         self::assertCount(5, $expectedUnique);
         self::assertSame($expectedUnique, $sheet2->getCell('H1')->getCalculatedValue());

From 6b5bf84fbb3a2f8f3cfab0548187b8c4218db3be Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 6 Jun 2024 07:09:50 -0700
Subject: [PATCH 08/31] Still More Formatting

I think I should go back to bed.
---
 tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index 788f7ec4be..e54b41bf19 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -175,7 +175,7 @@ public function testArrayMultipleColumns(): void
             [100, 92],
             [734, 12],
             [100, 91],
-            [5,2],
+            [5, 2],
         ];
         $sheet->fromArray($columnArray);
         $sheet->setCellValue('H1', '=UNIQUE(A1:B6)');

From 3daac0a64082555baaef47b90d3bab6c279d39e2 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 6 Jun 2024 13:16:16 -0700
Subject: [PATCH 09/31] Add TODO Note

ArrayFunctions2Test - the calculations seem too complicated for PhpSpreadsheet. The debug log is 21,300 lines, so I don't know how far I will get with it.
---
 .../Writer/Xlsx/ArrayFunctions2Test.php                  | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
index 0eded54202..3d9ed8803f 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
@@ -15,6 +15,8 @@
 use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
 use PHPUnit\Framework\TestCase;
 
+// TODO - I think the spreadsheet below is too difficult for PhpSpreadsheet to calculate correctly.
+
 class ArrayFunctions2Test extends TestCase
 {
     private const STYLESIZE14 = [
@@ -93,7 +95,8 @@ private function doPartijen(Worksheet $ws): int
 
         $lijn = 1;
         for ($i = 1; $i <= $this->trn['RONDEN']; ++$i) {//aantal ronden oneven->heen en even->terug
-            for ($j = 0; $j < count($saring); ++$j) {//subronden
+            $countSaring = count($saring);
+            for ($j = 0; $j < $countSaring; ++$j) {//subronden
                 ++$lijn;
                 if (isset($KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j], $KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j]['RONDE'])) {
                     $ws->setCellValue([9, $lijn], $KD[(($i - 1) * $this->trn['SUB_RONDEN']) + $j]['RONDE']);
@@ -109,7 +112,8 @@ private function doPartijen(Worksheet $ws): int
                 $ws->getStyle('A' . $lijn . ':L' . $lijn . '')->applyFromArray(self::STYLEBOLD14);
 
                 $s2 = explode(' ', $saring[$j]);
-                for ($k = 0; $k < count($s2); ++$k) {//borden
+                $counts2 = count($s2);
+                for ($k = 0; $k < $counts2; ++$k) {//borden
                     if (trim($s2[$k]) == '') {
                         continue;
                     }
@@ -302,6 +306,7 @@ public function testManyArraysOutput(): void
         self::assertSame('Dirk', $wsPartijen->getCell('I3')->getCalculatedValue());
         self::assertSame('Rudy', $wsPartijen->getCell('K4')->getCalculatedValue());
         $calcArray = $wsSort2->getCell('A2')->getCalculatedValue();
+        self::assertCount(8, $calcArray);
         $spreadsheet->disconnectWorksheets();
     }
 }

From ef176f382e19a2e01288750a5b4a980b19771e0b Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Sun, 9 Jun 2024 20:48:32 -0700
Subject: [PATCH 10/31] Excel Handle Array Functions as Dynamic Rather than CSE

With a number of changes, PhpSpreadsheet can finally generate a spreadsheet which Excel will recognize as a Dynamic Array function rather than CSE. In particular, changes are needed to ContentTypes, workbook.xml.rels, cell definitions in the worksheet, and a new metadata.xml is added.
---
 src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php |   4 +
 src/PhpSpreadsheet/Writer/Xlsx.php            |  19 +++
 .../Writer/Xlsx/ContentTypes.php              |   5 +
 src/PhpSpreadsheet/Writer/Xlsx/Metadata.php   |  83 +++++++++++
 src/PhpSpreadsheet/Writer/Xlsx/Rels.php       |  11 ++
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  |  12 +-
 .../Writer/Xlsx/ArrayFunctionsTest.php        | 134 ++++++++++++++++++
 7 files changed, 265 insertions(+), 3 deletions(-)
 create mode 100644 src/PhpSpreadsheet/Writer/Xlsx/Metadata.php

diff --git a/src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php b/src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php
index fa3e57e7b0..114fbe8004 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php
@@ -82,6 +82,8 @@ class Namespaces
 
     const CONTENT_TYPES = 'http://schemas.openxmlformats.org/package/2006/content-types';
 
+    const RELATIONSHIPS_METADATA = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/sheetMetadata';
+
     const RELATIONSHIPS_PRINTER_SETTINGS = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/printerSettings';
 
     const RELATIONSHIPS_TABLE = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/table';
@@ -115,4 +117,6 @@ class Namespaces
     const PURL_CHART = 'http://purl.oclc.org/ooxml/drawingml/chart';
 
     const PURL_WORKSHEET = 'http://purl.oclc.org/ooxml/officeDocument/relationships/worksheet';
+
+    const DYNAMIC_ARRAY = 'http://schemas.microsoft.com/office/spreadsheetml/2017/dynamicarray';
 }
diff --git a/src/PhpSpreadsheet/Writer/Xlsx.php b/src/PhpSpreadsheet/Writer/Xlsx.php
index f38eaff393..0a50efd840 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx.php
@@ -136,6 +136,10 @@ class Xlsx extends BaseWriter
 
     private bool $explicitStyle0 = false;
 
+    private bool $useCSEArrays = false;
+
+    private bool $useDynamicArray = false;
+
     /**
      * Create a new Xlsx Writer.
      */
@@ -247,6 +251,7 @@ public function getWriterPartWorksheet(): Worksheet
     public function save($filename, int $flags = 0): void
     {
         $this->processFlags($flags);
+        $this->useDynamicArray = $this->preCalculateFormulas && Calculation::getInstance($this->spreadSheet)->getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY && !$this->useCSEArrays;
 
         // garbage collect
         $this->pathNames = [];
@@ -277,6 +282,10 @@ public function save($filename, int $flags = 0): void
         $zipContent = [];
         // Add [Content_Types].xml to ZIP file
         $zipContent['[Content_Types].xml'] = $this->getWriterPartContentTypes()->writeContentTypes($this->spreadSheet, $this->includeCharts);
+        if ($this->useDynamicArrays()) {
+            $writerPartMetadata = new Xlsx\Metadata($this);
+            $zipContent['xl/metadata.xml'] = $writerPartMetadata->writeMetadata();
+        }
 
         //if hasMacros, add the vbaProject.bin file, Certificate file(if exists)
         if ($this->spreadSheet->hasMacros()) {
@@ -711,4 +720,14 @@ public function setExplicitStyle0(bool $explicitStyle0): self
 
         return $this;
     }
+
+    public function setUseCSEArrays(bool $useCSEArrays): void
+    {
+        $this->useCSEArrays = $useCSEArrays;
+    }
+
+    public function useDynamicArrays(): bool
+    {
+        return $this->useDynamicArray;
+    }
 }
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/ContentTypes.php b/src/PhpSpreadsheet/Writer/Xlsx/ContentTypes.php
index e3b9ba5eb8..dd46fc47f1 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/ContentTypes.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/ContentTypes.php
@@ -209,6 +209,11 @@ public function writeContentTypes(Spreadsheet $spreadsheet, bool $includeCharts
             }
         }
 
+        // Metadata needed for Dynamic Arrays
+        if ($this->getParentWriter()->useDynamicArrays()) {
+            $this->writeOverrideContentType($objWriter, '/xl/metadata.xml', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheetMetadata+xml');
+        }
+
         $objWriter->endElement();
 
         // Return
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php b/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php
new file mode 100644
index 0000000000..7f6d04bfa3
--- /dev/null
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php
@@ -0,0 +1,83 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
+
+use PhpOffice\PhpSpreadsheet\Reader\Xlsx\Namespaces;
+use PhpOffice\PhpSpreadsheet\Shared\XMLWriter;
+
+class Metadata extends WriterPart
+{
+    /**
+     * Write content types to XML format.
+     *
+     * @return string XML Output
+     */
+    public function writeMetadata(): string
+    {
+        // Create XML writer
+        $objWriter = null;
+        if ($this->getParentWriter()->getUseDiskCaching()) {
+            $objWriter = new XMLWriter(XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
+        } else {
+            $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
+        }
+
+        // XML header
+        $objWriter->startDocument('1.0', 'UTF-8', 'yes');
+
+        // Types
+        $objWriter->startElement('metadata');
+        $objWriter->writeAttribute('xmlns', Namespaces::MAIN);
+        $objWriter->writeAttribute('xmlns:xda', Namespaces::DYNAMIC_ARRAY);
+
+        $objWriter->startElement('metadataTypes');
+        $objWriter->writeAttribute('count', '1');
+        $objWriter->startElement('metadataType');
+        $objWriter->writeAttribute('name', 'XLDAPR');
+        $objWriter->writeAttribute('minSupportedVersion', '120000');
+        $objWriter->writeAttribute('copy', '1');
+        $objWriter->writeAttribute('pasteAll', '1');
+        $objWriter->writeAttribute('pasteValues', '1');
+        $objWriter->writeAttribute('merge', '1');
+        $objWriter->writeAttribute('splitFirst', '1');
+        $objWriter->writeAttribute('rowColShift', '1');
+        $objWriter->writeAttribute('clearFormats', '1');
+        $objWriter->writeAttribute('clearComments', '1');
+        $objWriter->writeAttribute('assign', '1');
+        $objWriter->writeAttribute('coerce', '1');
+        $objWriter->writeAttribute('cellMeta', '1');
+        $objWriter->endElement(); // metadataType
+        $objWriter->endElement(); // metadataTypes
+
+        $objWriter->startElement('futureMetadata');
+        $objWriter->writeAttribute('name', 'XLDAPR');
+        $objWriter->writeAttribute('count', '1');
+        $objWriter->startElement('bk');
+        $objWriter->startElement('extLst');
+        $objWriter->startElement('ext');
+        $objWriter->writeAttribute('uri', '{bdbb8cdc-fa1e-496e-a857-3c3f30c029c3}');
+        $objWriter->startElement('xda:dynamicArrayProperties');
+        $objWriter->writeAttribute('fDynamic', '1');
+        $objWriter->writeAttribute('fCollapsed', '0');
+        $objWriter->endElement(); // xda:dynamicArrayProperties
+        $objWriter->endElement(); // ext
+        $objWriter->endElement(); // extLst
+        $objWriter->endElement(); // bk
+        $objWriter->endElement(); // futureMetadata
+
+        $objWriter->startElement('cellMetadata');
+        $objWriter->writeAttribute('count', '1');
+        $objWriter->startElement('bk');
+        $objWriter->startElement('rc');
+        $objWriter->writeAttribute('t', '1');
+        $objWriter->writeAttribute('v', '0');
+        $objWriter->endElement(); // rc
+        $objWriter->endElement(); // bk
+        $objWriter->endElement(); // cellMetadata
+
+        $objWriter->endElement(); // metadata
+
+        // Return
+        return $objWriter->getData();
+    }
+}
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Rels.php b/src/PhpSpreadsheet/Writer/Xlsx/Rels.php
index 1e6e3b493e..ceb78117c6 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Rels.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Rels.php
@@ -151,6 +151,17 @@ public function writeWorkbookRelationships(Spreadsheet $spreadsheet): string
             ++$i; //increment i if needed for an another relation
         }
 
+        // Metadata needed for Dynamic Arrays
+        if ($this->getParentWriter()->useDynamicArrays()) {
+            $this->writeRelationShip(
+                $objWriter,
+                ($i + 1 + 3),
+                Namespaces::RELATIONSHIPS_METADATA,
+                'metadata.xml'
+            );
+            ++$i; //increment i if needed for an another relation
+        }
+
         $objWriter->endElement();
 
         return $objWriter->getData();
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 14d4b32538..53bcb02b85 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -1558,6 +1558,15 @@ private function writeCell(XMLWriter $objWriter, PhpspreadsheetWorksheet $worksh
         }
         $objWriter->startElement('c');
         $objWriter->writeAttribute('r', $cellAddress);
+        $mappedType = $pCell->getDataType();
+        if (strtolower($mappedType) === 'f') {
+            if ($this->getParentWriter()->useDynamicArrays()) {
+                $tempCalc = $pCell->getCalculatedValue();
+                if (is_array($tempCalc)) {
+                    $objWriter->writeAttribute('cm', '1');
+                }
+            }
+        }
 
         // Sheet styles
         if ($xfi) {
@@ -1568,9 +1577,6 @@ private function writeCell(XMLWriter $objWriter, PhpspreadsheetWorksheet $worksh
 
         // If cell value is supplied, write cell value
         if ($writeValue) {
-            // Map type
-            $mappedType = $pCell->getDataType();
-
             // Write data depending on its type
             switch (strtolower($mappedType)) {
                 case 'inlinestr':    // Inline string
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index e54b41bf19..649d5fff7f 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -116,6 +116,122 @@ public function testArrayOutput(): void
         self::assertSame($expectedSort, $sheet2->getCell('D1')->getCalculatedValue());
         $spreadsheet2->disconnectWorksheets();
 
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#xl/worksheets/sheet1.xml';
+        $data = file_get_contents($file);
+        if ($data === false) {
+            self::fail('Unable to read file');
+        } else {
+            self::assertStringContainsString('<c r="C1" cm="1"><f t="array" ref="C1:C15" aca="1" ca="1">_xlfn.UNIQUE(A1:A19)</f><v>41</v></c>', $data, '15 results for UNIQUE');
+            self::assertStringContainsString('<c r="D1" cm="1"><f t="array" ref="D1:D19" aca="1" ca="1">_xlfn._xlws.SORT(A1:A19)</f><v>26</v></c>', $data, '19 results for SORT');
+        }
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#xl/metadata.xml';
+        $data = @file_get_contents($file);
+        self::assertNotFalse($data, 'metadata.xml should exist');
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#[Content_Types].xml';
+        $data = file_get_contents($file);
+        self::assertStringContainsString('metadata', $data);
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#xl/_rels/workbook.xml.rels';
+        $data = file_get_contents($file);
+        self::assertStringContainsString('metadata', $data);
+    }
+
+    public function testArrayOutputCSE(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $columnArray = [
+            [41],
+            [57],
+            [51],
+            [54],
+            [49],
+            [43],
+            [35],
+            [35],
+            [44],
+            [47],
+            [48],
+            [26],
+            [57],
+            [34],
+            [61],
+            [34],
+            [28],
+            [29],
+            [41],
+        ];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('C1', '=UNIQUE(A1:A19)');
+        $sheet->setCellValue('D1', '=SORT(A1:A19)');
+        $writer = new XlsxWriter($spreadsheet);
+        $this->outputFile = File::temporaryFilename();
+        $writer->setUseCSEArrays(true);
+        $writer->save($this->outputFile);
+        $spreadsheet->disconnectWorksheets();
+
+        $reader = new XlsxReader();
+        $spreadsheet2 = $reader->load($this->outputFile);
+        $sheet2 = $spreadsheet2->getActiveSheet();
+        $expectedUnique = [
+            [41],
+            [57],
+            [51],
+            [54],
+            [49],
+            [43],
+            [35],
+            [44],
+            [47],
+            [48],
+            [26],
+            [34],
+            [61],
+            [28],
+            [29],
+        ];
+        self::assertCount(15, $expectedUnique);
+        self::assertSame($expectedUnique, $sheet2->getCell('C1')->getCalculatedValue());
+        for ($row = 2; $row <= 15; ++$row) {
+            self::assertSame($expectedUnique[$row - 1][0], $sheet2->getCell("C$row")->getCalculatedValue(), "cell C$row");
+        }
+        $expectedSort = [
+            [26],
+            [28],
+            [29],
+            [34],
+            [34],
+            [35],
+            [35],
+            [41],
+            [41],
+            [43],
+            [44],
+            [47],
+            [48],
+            [49],
+            [51],
+            [54],
+            [57],
+            [57],
+            [61],
+        ];
+        self::assertCount(19, $expectedSort);
+        self::assertCount(19, $columnArray);
+        self::assertSame($expectedSort, $sheet2->getCell('D1')->getCalculatedValue());
+        $spreadsheet2->disconnectWorksheets();
+
         $file = 'zip://';
         $file .= $this->outputFile;
         $file .= '#xl/worksheets/sheet1.xml';
@@ -126,6 +242,24 @@ public function testArrayOutput(): void
             self::assertStringContainsString('<c r="C1"><f t="array" ref="C1:C15" aca="1" ca="1">_xlfn.UNIQUE(A1:A19)</f><v>41</v></c>', $data, '15 results for UNIQUE');
             self::assertStringContainsString('<c r="D1"><f t="array" ref="D1:D19" aca="1" ca="1">_xlfn._xlws.SORT(A1:A19)</f><v>26</v></c>', $data, '19 results for SORT');
         }
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#xl/metadata.xml';
+        $data = @file_get_contents($file);
+        self::assertFalse($data, 'metadata.xml should not exist');
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#[Content_Types].xml';
+        $data = file_get_contents($file);
+        self::assertStringNotContainsString('metadata', $data);
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#xl/_rels/workbook.xml.rels';
+        $data = file_get_contents($file);
+        self::assertStringNotContainsString('metadata', $data);
     }
 
     public function testUnimplementedArrayOutput(): void

From 846fec7afab7d1f72660e15cd74be7776babdb1c Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Mon, 10 Jun 2024 09:19:35 -0700
Subject: [PATCH 11/31] Minor Performance Improvements

---
 src/PhpSpreadsheet/Writer/Xlsx.php            | 21 +++++++++++++------
 src/PhpSpreadsheet/Writer/Xlsx/Metadata.php   |  3 +++
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  |  8 +++++--
 .../Writer/Xlsx/ArrayFunctionsTest.php        | 13 ++++++++++++
 4 files changed, 37 insertions(+), 8 deletions(-)

diff --git a/src/PhpSpreadsheet/Writer/Xlsx.php b/src/PhpSpreadsheet/Writer/Xlsx.php
index 0a50efd840..57ca689ad0 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx.php
@@ -171,6 +171,7 @@ public function __construct(Spreadsheet $spreadsheet)
         $this->numFmtHashTable = new HashTable();
         $this->styleHashTable = new HashTable();
         $this->stylesConditionalHashTable = new HashTable();
+        $this->determineUseDynamicArrays();
     }
 
     public function getWriterPartChart(): Chart
@@ -251,7 +252,7 @@ public function getWriterPartWorksheet(): Worksheet
     public function save($filename, int $flags = 0): void
     {
         $this->processFlags($flags);
-        $this->useDynamicArray = $this->preCalculateFormulas && Calculation::getInstance($this->spreadSheet)->getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY && !$this->useCSEArrays;
+        $this->determineUseDynamicArrays();
 
         // garbage collect
         $this->pathNames = [];
@@ -282,9 +283,9 @@ public function save($filename, int $flags = 0): void
         $zipContent = [];
         // Add [Content_Types].xml to ZIP file
         $zipContent['[Content_Types].xml'] = $this->getWriterPartContentTypes()->writeContentTypes($this->spreadSheet, $this->includeCharts);
-        if ($this->useDynamicArrays()) {
-            $writerPartMetadata = new Xlsx\Metadata($this);
-            $zipContent['xl/metadata.xml'] = $writerPartMetadata->writeMetadata();
+        $metadataData = (new Xlsx\Metadata($this))->writeMetadata();
+        if ($metadataData !== '') {
+            $zipContent['xl/metadata.xml'] = $metadataData;
         }
 
         //if hasMacros, add the vbaProject.bin file, Certificate file(if exists)
@@ -721,13 +722,21 @@ public function setExplicitStyle0(bool $explicitStyle0): self
         return $this;
     }
 
-    public function setUseCSEArrays(bool $useCSEArrays): void
+    public function setUseCSEArrays(?bool $useCSEArrays): void
     {
-        $this->useCSEArrays = $useCSEArrays;
+        if ($useCSEArrays !== null) {
+            $this->useCSEArrays = $useCSEArrays;
+        }
+        $this->determineUseDynamicArrays();
     }
 
     public function useDynamicArrays(): bool
     {
         return $this->useDynamicArray;
     }
+
+    private function determineUseDynamicArrays(): void
+    {
+        $this->useDynamicArray = $this->preCalculateFormulas && Calculation::getInstance($this->spreadSheet)->getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY && !$this->useCSEArrays;
+    }
 }
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php b/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php
index 7f6d04bfa3..67b5a840a6 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php
@@ -14,6 +14,9 @@ class Metadata extends WriterPart
      */
     public function writeMetadata(): string
     {
+        if (!$this->getParentWriter()->useDynamicArrays()) {
+            return '';
+        }
         // Create XML writer
         $objWriter = null;
         if ($this->getParentWriter()->getUseDiskCaching()) {
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 53bcb02b85..7dfaaf68d7 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -5,6 +5,7 @@
 use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
 use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
+use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Reader\Xlsx\Namespaces;
 use PhpOffice\PhpSpreadsheet\RichText\RichText;
 use PhpOffice\PhpSpreadsheet\Settings;
@@ -30,6 +31,8 @@ class Worksheet extends WriterPart
 
     private bool $explicitStyle0;
 
+    private bool $useDynamicArrays = false;
+
     /**
      * Write worksheet to XML format.
      *
@@ -40,6 +43,7 @@ class Worksheet extends WriterPart
      */
     public function writeWorksheet(PhpspreadsheetWorksheet $worksheet, array $stringTable = [], bool $includeCharts = false): string
     {
+        $this->useDynamicArrays = $this->getParentWriter()->useDynamicArrays();
         $this->explicitStyle0 = $this->getParentWriter()->getExplicitStyle0();
         $this->numberStoredAsText = '';
         $this->formula = '';
@@ -1559,8 +1563,8 @@ private function writeCell(XMLWriter $objWriter, PhpspreadsheetWorksheet $worksh
         $objWriter->startElement('c');
         $objWriter->writeAttribute('r', $cellAddress);
         $mappedType = $pCell->getDataType();
-        if (strtolower($mappedType) === 'f') {
-            if ($this->getParentWriter()->useDynamicArrays()) {
+        if ($mappedType === DataType::TYPE_FORMULA) {
+            if ($this->useDynamicArrays) {
                 $tempCalc = $pCell->getCalculatedValue();
                 if (is_array($tempCalc)) {
                     $objWriter->writeAttribute('cm', '1');
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index 649d5fff7f..bacd972a2e 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -339,4 +339,17 @@ public function testArrayMultipleColumns(): void
         }
         $spreadsheet2->disconnectWorksheets();
     }
+
+    public function testMetadataWritten(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $writer = new XlsxWriter($spreadsheet);
+        $writerMetadata = new XlsxWriter\Metadata($writer);
+        self::assertNotEquals('', $writerMetadata->writeMetaData());
+        $writer->setUseCSEArrays(true);
+        $writerMetadata2 = new XlsxWriter\Metadata($writer);
+        self::assertSame('', $writerMetadata2->writeMetaData());
+        $spreadsheet->disconnectWorksheets();
+    }
 }

From ad2194d73708879d7ad4e73e006bc7a1f198e279 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Fri, 14 Jun 2024 08:30:18 -0700
Subject: [PATCH 12/31] CONCATENATE Changes, and Csv/Html/Ods Support

The CONCATENATE function has been treated as equivalent to CONCAT. This is not how it is treated in Excel; it is closer to (and probably identical to) the ampersand concatenate operator. The difference manifests itself when any of the arguments is an array (typically a cell range). Code is added to support this difference.

Support for array results is added to Csv Writer, Html Writer, and Ods Reader and Writer. I have not figured out how to get it to work with Xls.
---
 docs/references/function-list-by-category.md  |  2 +-
 docs/references/function-list-by-name.md      |  2 +-
 .../Calculation/Calculation.php               |  6 +-
 .../Calculation/TextData/Concatenate.php      | 54 ++++++++++-
 src/PhpSpreadsheet/Cell/Cell.php              | 38 +++++---
 src/PhpSpreadsheet/Reader/Xlsx.php            |  4 +-
 .../Reader/Xlsx/ConditionalStyles.php         |  1 +
 src/PhpSpreadsheet/Worksheet/Worksheet.php    | 10 ++
 src/PhpSpreadsheet/Writer/Csv.php             |  4 +-
 src/PhpSpreadsheet/Writer/Html.php            | 15 +--
 src/PhpSpreadsheet/Writer/Ods/Content.php     |  1 +
 .../Writer/Xlsx/FunctionPrefix.php            | 39 ++++++--
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  | 29 ++++--
 .../Functions/TextData/ConcatTest.php         | 57 +++++++++++
 .../TextData/ConcatenateRangeTest.php         | 48 ++++++++++
 .../Functions/TextData/ConcatenateTest.php    | 22 ++++-
 .../Calculation/XlfnFunctionsTest.php         | 49 ++++++++--
 .../Writer/Csv/CsvArrayTest.php               | 65 +++++++++++++
 .../Writer/Html/HtmlArrayTest.php             | 65 +++++++++++++
 .../Writer/Ods/ArrayTest.php                  | 95 +++++++++++++++++++
 .../Writer/Ods/ContentTest.php                |  2 +-
 .../Writer/Xlsx/ArrayFunctionsInlineTest.php  | 46 +++++++++
 .../Writer/Xlsx/ArrayFunctionsTest.php        |  2 +-
 tests/data/Calculation/TextData/CONCAT.php    | 39 ++++++++
 .../data/Calculation/TextData/CONCATENATE.php |  8 +-
 tests/data/Writer/Ods/content-arrays.xml      |  2 +
 tests/data/Writer/Ods/content-with-data.xml   |  2 +-
 27 files changed, 636 insertions(+), 71 deletions(-)
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateRangeTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Writer/Csv/CsvArrayTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Writer/Html/HtmlArrayTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsInlineTest.php
 create mode 100644 tests/data/Calculation/TextData/CONCAT.php
 create mode 100644 tests/data/Writer/Ods/content-arrays.xml

diff --git a/docs/references/function-list-by-category.md b/docs/references/function-list-by-category.md
index 353458ca40..e69cf6d5b6 100644
--- a/docs/references/function-list-by-category.md
+++ b/docs/references/function-list-by-category.md
@@ -529,7 +529,7 @@ CHAR                     | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Charac
 CLEAN                    | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Trim::nonPrintable
 CODE                     | \PhpOffice\PhpSpreadsheet\Calculation\TextData\CharacterConvert::code
 CONCAT                   | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Concatenate::CONCATENATE
-CONCATENATE              | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Concatenate::CONCATENATE
+CONCATENATE              | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Concatenate::actualCONCATENATE
 DBCS                     | **Not yet Implemented**
 DOLLAR                   | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Format::DOLLAR
 EXACT                    | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Text::exact
diff --git a/docs/references/function-list-by-name.md b/docs/references/function-list-by-name.md
index 24c7f823ef..cafd0d6fca 100644
--- a/docs/references/function-list-by-name.md
+++ b/docs/references/function-list-by-name.md
@@ -89,7 +89,7 @@ COMBIN                   | CATEGORY_MATH_AND_TRIG         | \PhpOffice\PhpSpread
 COMBINA                  | CATEGORY_MATH_AND_TRIG         | \PhpOffice\PhpSpreadsheet\Calculation\MathTrig\Combinations::withRepetition
 COMPLEX                  | CATEGORY_ENGINEERING           | \PhpOffice\PhpSpreadsheet\Calculation\Engineering\Complex::COMPLEX
 CONCAT                   | CATEGORY_TEXT_AND_DATA         | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Concatenate::CONCATENATE
-CONCATENATE              | CATEGORY_TEXT_AND_DATA         | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Concatenate::CONCATENATE
+CONCATENATE              | CATEGORY_TEXT_AND_DATA         | \PhpOffice\PhpSpreadsheet\Calculation\TextData\Concatenate::actualCONCATENATE
 CONFIDENCE               | CATEGORY_STATISTICAL           | \PhpOffice\PhpSpreadsheet\Calculation\Statistical\Confidence::CONFIDENCE
 CONFIDENCE.NORM          | CATEGORY_STATISTICAL           | \PhpOffice\PhpSpreadsheet\Calculation\Statistical\Confidence::CONFIDENCE
 CONFIDENCE.T             | CATEGORY_STATISTICAL           | **Not yet Implemented**
diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 7a2137dc06..8869b23fac 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -598,7 +598,7 @@ public static function getExcelConstants(string $key): bool|null
         ],
         'CONCATENATE' => [
             'category' => Category::CATEGORY_TEXT_AND_DATA,
-            'functionCall' => [TextData\Concatenate::class, 'CONCATENATE'],
+            'functionCall' => [TextData\Concatenate::class, 'actualCONCATENATE'],
             'argumentCount' => '1+',
         ],
         'CONFIDENCE' => [
@@ -3703,7 +3703,7 @@ public function _calculateFormulaValue(string $formula, ?string $cellID = null,
      *                                            1 = shrink to fit
      *                                            2 = extend to fit
      */
-    private static function checkMatrixOperands(mixed &$operand1, mixed &$operand2, int $resize = 1): array
+    public static function checkMatrixOperands(mixed &$operand1, mixed &$operand2, int $resize = 1): array
     {
         //    Examine each of the two operands, and turn them into an array if they aren't one already
         //    Note that this function should only be called if one or both of the operand is already an array
@@ -5643,7 +5643,7 @@ public function getSuppressFormulaErrors(): bool
         return $this->suppressFormulaErrorsNew;
     }
 
-    private static function boolToString(mixed $operand1): mixed
+    public static function boolToString(mixed $operand1): mixed
     {
         if (is_bool($operand1)) {
             $operand1 = ($operand1) ? self::$localeBoolean['TRUE'] : self::$localeBoolean['FALSE'];
diff --git a/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php b/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
index c2281d4364..21f82ca1ea 100644
--- a/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
+++ b/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet\Calculation\TextData;
 
 use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
@@ -14,7 +15,7 @@ class Concatenate
     use ArrayEnabled;
 
     /**
-     * CONCATENATE.
+     * This implements the CONCAT function, *not* CONCATENATE.
      *
      * @param array $args
      */
@@ -43,6 +44,57 @@ public static function CONCATENATE(...$args): string
         return $returnValue;
     }
 
+    /**
+     * This implements the CONCATENATE function.
+     *
+     * @param array $args data to be concatenated
+     */
+    public static function actualCONCATENATE(...$args): array|string
+    {
+        $result = '';
+        foreach ($args as $operand2) {
+            $result = self::concatenate2Args($result, $operand2);
+            if (ErrorValue::isError($result) === true) {
+                break;
+            }
+        }
+
+        return $result;
+    }
+
+    private static function concatenate2Args(array|string $operand1, null|array|bool|float|int|string $operand2): array|string
+    {
+        if (is_array($operand1) || is_array($operand2)) {
+            $operand1 = Calculation::boolToString($operand1);
+            $operand2 = Calculation::boolToString($operand2);
+            [$rows, $columns] = Calculation::checkMatrixOperands($operand1, $operand2, 2);
+            $errorFound = false;
+            for ($row = 0; $row < $rows && !$errorFound; ++$row) {
+                for ($column = 0; $column < $columns; ++$column) {
+                    if (ErrorValue::isError($operand2[$row][$column])) {
+                        return $operand2[$row][$column];
+                    }
+                    $operand1[$row][$column]
+                        = Calculation::boolToString($operand1[$row][$column])
+                        . Calculation::boolToString($operand2[$row][$column]);
+                    if (mb_strlen($operand1[$row][$column]) > DataType::MAX_STRING_LENGTH) {
+                        $operand1 = ExcelError::CALC();
+                        $errorFound = true;
+
+                        break;
+                    }
+                }
+            }
+        } else {
+            $operand1 .= (string) Calculation::boolToString($operand2);
+            if (mb_strlen($operand1) > DataType::MAX_STRING_LENGTH) {
+                $operand1 = ExcelError::CALC();
+            }
+        }
+
+        return $operand1;
+    }
+
     /**
      * TEXTJOIN.
      *
diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index ffc8641082..ea46231b70 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -349,6 +349,9 @@ private function convertDateTimeInt(mixed $result): mixed
     public function getCalculatedValueString(): string
     {
         $value = $this->getCalculatedValue();
+        while (is_array($value)) {
+            $value = array_shift($value);
+        }
 
         return ($value === '' || is_scalar($value) || $value instanceof Stringable) ? "$value" : '';
     }
@@ -362,17 +365,19 @@ public function getCalculatedValueString(): string
      */
     public function getCalculatedValue(bool $resetLog = true): mixed
     {
+        $title = 'unknown';
         if ($this->dataType === DataType::TYPE_FORMULA) {
             try {
-                $index = $this->getWorksheet()->getParentOrThrow()->getActiveSheetIndex();
-                $selected = $this->getWorksheet()->getSelectedCells();
+                $thisworksheet = $this->getWorksheet();
+                $title = $thisworksheet->getTitle();
+                $index = $thisworksheet->getParentOrThrow()->getActiveSheetIndex();
+                $selected = $thisworksheet->getSelectedCells();
                 $result = Calculation::getInstance(
-                    $this->getWorksheet()->getParent()
+                    $thisworksheet->getParent()
                 )->calculateCellValue($this, $resetLog);
                 $result = $this->convertDateTimeInt($result);
-                $this->getWorksheet()->setSelectedCells($selected);
-                $this->getWorksheet()->getParentOrThrow()->setActiveSheetIndex($index);
-                //    We don't yet handle array returns
+                $thisworksheet->setSelectedCells($selected);
+                $thisworksheet->getParentOrThrow()->setActiveSheetIndex($index);
                 if (is_array($result) && Calculation::getArrayReturnType() !== Calculation::RETURN_ARRAY_AS_ARRAY) {
                     while (is_array($result)) {
                         $result = array_shift($result);
@@ -390,21 +395,28 @@ public function getCalculatedValue(bool $resetLog = true): mixed
                         }
                     }
                 }
+                $newColumn = $this->getColumn();
                 if (is_array($result)) {
                     $newRow = $row = $this->getRow();
                     $column = $this->getColumn();
                     foreach ($result as $resultRow) {
-                        $newColumn = $column;
-                        $resultRowx = is_array($resultRow) ? $resultRow : [$resultRow];
-                        foreach ($resultRowx as $resultValue) {
+                        if (is_array($resultRow)) {
+                            $newColumn = $column;
+                            foreach ($resultRow as $resultValue) {
+                                if ($row !== $newRow || $column !== $newColumn) {
+                                    $thisworksheet->getCell($newColumn . $newRow)->setValue($resultValue);
+                                }
+                                ++$newColumn;
+                            }
+                            ++$newRow;
+                        } else {
                             if ($row !== $newRow || $column !== $newColumn) {
-                                $this->getWorksheet()->getCell($newColumn . $newRow)->setValue($resultValue);
+                                $thisworksheet->getCell($newColumn . $newRow)->setValue($resultRow);
                             }
                             ++$newColumn;
                         }
-                        ++$newRow;
                     }
-                    $this->getWorksheet()->getCell($column . $row);
+                    $thisworksheet->getCell($column . $row);
                 }
             } catch (SpreadsheetException $ex) {
                 if (($ex->getMessage() === 'Unable to access External Workbook') && ($this->calculatedValue !== null)) {
@@ -414,7 +426,7 @@ public function getCalculatedValue(bool $resetLog = true): mixed
                 }
 
                 throw new CalculationException(
-                    $this->getWorksheet()->getTitle() . '!' . $this->getCoordinate() . ' -> ' . $ex->getMessage(),
+                    $title . '!' . $this->getCoordinate() . ' -> ' . $ex->getMessage(),
                     $ex->getCode(),
                     $ex
                 );
diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
index e924bfc680..e628a8d2bb 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -309,7 +309,9 @@ private function castToFormula(?SimpleXMLElement $c, string $r, string &$cellDat
         }
         $attr = $c->f->attributes();
         $cellDataType = DataType::TYPE_FORMULA;
-        $value = "={$c->f}";
+        $formula = (string) $c->f;
+        $formula = str_replace(['_xlfn.', '_xlws.'], '', $formula);
+        $value = "=$formula";
         $calculatedValue = self::$castBaseType($c);
 
         // Shared formula?
diff --git a/src/PhpSpreadsheet/Reader/Xlsx/ConditionalStyles.php b/src/PhpSpreadsheet/Reader/Xlsx/ConditionalStyles.php
index cb562ef623..8731d642e5 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx/ConditionalStyles.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx/ConditionalStyles.php
@@ -220,6 +220,7 @@ private function readStyleRules(array $cfRules, SimpleXMLElement $extLst): array
             if (count($cfRule->formula) >= 1) {
                 foreach ($cfRule->formula as $formulax) {
                     $formula = (string) $formulax;
+                    $formula = str_replace(['_xlfn.', '_xlws.'], '', $formula);
                     if ($formula === 'TRUE') {
                         $objConditional->addCondition(true);
                     } elseif ($formula === 'FALSE') {
diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
index 8adada4c11..5ea798f3f2 100644
--- a/src/PhpSpreadsheet/Worksheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -3673,4 +3673,14 @@ public function copyCells(string $fromCell, string $toCells, bool $copyStyle = t
             }
         }
     }
+
+    public function calculateArrays(bool $preCalculateFormulas = true): void
+    {
+        if ($preCalculateFormulas && Calculation::getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY) {
+            $keys = $this->cellCollection->getCoordinates();
+            foreach ($keys as $key) {
+                $this->getCell($key)->getCalculatedValue();
+            }
+        }
+    }
 }
diff --git a/src/PhpSpreadsheet/Writer/Csv.php b/src/PhpSpreadsheet/Writer/Csv.php
index 6ce968d8cb..6e0c20d253 100644
--- a/src/PhpSpreadsheet/Writer/Csv.php
+++ b/src/PhpSpreadsheet/Writer/Csv.php
@@ -76,8 +76,7 @@ public function save($filename, int $flags = 0): void
 
         $saveDebugLog = Calculation::getInstance($this->spreadsheet)->getDebugLog()->getWriteDebugLog();
         Calculation::getInstance($this->spreadsheet)->getDebugLog()->setWriteDebugLog(false);
-        $saveArrayReturnType = Calculation::getArrayReturnType();
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_VALUE);
+        $sheet->calculateArrays($this->preCalculateFormulas);
 
         // Open file
         $this->openFileHandle($filename);
@@ -110,7 +109,6 @@ public function save($filename, int $flags = 0): void
         }
 
         $this->maybeCloseFileHandle();
-        Calculation::setArrayReturnType($saveArrayReturnType);
         Calculation::getInstance($this->spreadsheet)->getDebugLog()->setWriteDebugLog($saveDebugLog);
     }
 
diff --git a/src/PhpSpreadsheet/Writer/Html.php b/src/PhpSpreadsheet/Writer/Html.php
index e344e33989..d7a52e65b4 100644
--- a/src/PhpSpreadsheet/Writer/Html.php
+++ b/src/PhpSpreadsheet/Writer/Html.php
@@ -173,13 +173,15 @@ public function save($filename, int $flags = 0): void
      */
     public function generateHtmlAll(): string
     {
+        $sheets = $this->generateSheetPrep();
+        foreach ($sheets as $sheet) {
+            $sheet->calculateArrays($this->preCalculateFormulas);
+        }
         // garbage collect
         $this->spreadsheet->garbageCollect();
 
         $saveDebugLog = Calculation::getInstance($this->spreadsheet)->getDebugLog()->getWriteDebugLog();
         Calculation::getInstance($this->spreadsheet)->getDebugLog()->setWriteDebugLog(false);
-        $saveArrayReturnType = Calculation::getArrayReturnType();
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_VALUE);
 
         // Build CSS
         $this->buildCSS(!$this->useInlineCss);
@@ -204,7 +206,6 @@ public function generateHtmlAll(): string
             $html = $callback($html);
         }
 
-        Calculation::setArrayReturnType($saveArrayReturnType);
         Calculation::getInstance($this->spreadsheet)->getDebugLog()->setWriteDebugLog($saveDebugLog);
 
         return $html;
@@ -404,11 +405,9 @@ public function generateHTMLHeader(bool $includeStyles = false): string
         return $html;
     }
 
+    /** @return Worksheet[] */
     private function generateSheetPrep(): array
     {
-        // Ensure that Spans have been calculated?
-        $this->calculateSpans();
-
         // Fetch sheets
         if ($this->sheetIndex === null) {
             $sheets = $this->spreadsheet->getAllSheets();
@@ -456,6 +455,8 @@ private function generateSheetTags(int $row, int $theadStart, int $theadEnd, int
      */
     public function generateSheetData(): string
     {
+        // Ensure that Spans have been calculated?
+        $this->calculateSpans();
         $sheets = $this->generateSheetPrep();
 
         // Construct HTML
@@ -484,7 +485,7 @@ public function generateSheetData(): string
                 $html .= $startTag;
 
                 // Write row if there are HTML table cells in it
-                if ($this->shouldGenerateRow($sheet, $row) && !isset($this->isSpannedRow[$sheet->getParent()->getIndex($sheet)][$row])) {
+                if ($this->shouldGenerateRow($sheet, $row) && !isset($this->isSpannedRow[$sheet->getParentOrThrow()->getIndex($sheet)][$row])) {
                     // Start a new rowData
                     $rowData = [];
                     // Loop through columns
diff --git a/src/PhpSpreadsheet/Writer/Ods/Content.php b/src/PhpSpreadsheet/Writer/Ods/Content.php
index 7b052bbccb..7cbcc42fd1 100644
--- a/src/PhpSpreadsheet/Writer/Ods/Content.php
+++ b/src/PhpSpreadsheet/Writer/Ods/Content.php
@@ -120,6 +120,7 @@ private function writeSheets(XMLWriter $objWriter): void
         $spreadsheet = $this->getParentWriter()->getSpreadsheet();
         $sheetCount = $spreadsheet->getSheetCount();
         for ($sheetIndex = 0; $sheetIndex < $sheetCount; ++$sheetIndex) {
+            $spreadsheet->getSheet($sheetIndex)->calculateArrays($this->getParentWriter()->getPreCalculateFormulas());
             $objWriter->startElement('table:table');
             $objWriter->writeAttribute('table:name', $spreadsheet->getSheet($sheetIndex)->getTitle());
             $objWriter->writeAttribute('table:style-name', Style::TABLE_STYLE_PREFIX . (string) ($sheetIndex + 1));
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/FunctionPrefix.php b/src/PhpSpreadsheet/Writer/Xlsx/FunctionPrefix.php
index 6f66eccfbc..b91f02777f 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/FunctionPrefix.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/FunctionPrefix.php
@@ -131,25 +131,44 @@ class FunctionPrefix
         . '|sumifs'
         . '|textjoin'
         // functions added with Excel 365
-        . '|filter'
-        . '|randarray'
         . '|anchorarray'
-        . '|sequence'
-        . '|sort'
-        . '|sortby'
-        . '|unique'
-        . '|xlookup'
-        . '|xmatch'
         . '|arraytotext'
+        . '|bycol'
+        . '|byrow'
         . '|call'
-        . '|let'
+        . '|choosecols'
+        . '|chooserows'
+        . '|drop'
+        . '|expand'
+        . '|filter'
+        . '|hstack'
+        . '|isomitted'
         . '|lambda'
-        . '|single'
+        . '|let'
+        . '|makearray'
+        . '|map'
+        . '|randarray'
+        . '|reduce'
         . '|register[.]id'
+        . '|scan'
+        . '|sequence'
+        . '|single'
+        . '|sort'
+        . '|sortby'
+        . '|take'
         . '|textafter'
         . '|textbefore'
+        . '|textjoin'
         . '|textsplit'
+        . '|tocol'
+        . '|torow'
+        . '|unique'
         . '|valuetotext'
+        . '|vstack'
+        . '|wrapcols'
+        . '|wraprows'
+        . '|xlookup'
+        . '|xmatch'
         . '))\s*\(/Umui';
 
     const XLWSREGEXP = '/(?<!_xlws\.)('
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 7dfaaf68d7..2afd0999b5 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -45,6 +45,7 @@ public function writeWorksheet(PhpspreadsheetWorksheet $worksheet, array $string
     {
         $this->useDynamicArrays = $this->getParentWriter()->useDynamicArrays();
         $this->explicitStyle0 = $this->getParentWriter()->getExplicitStyle0();
+        $worksheet->calculateArrays($this->getParentWriter()->getPreCalculateFormulas());
         $this->numberStoredAsText = '';
         $this->formula = '';
         $this->twoDigitTextYear = '';
@@ -1475,18 +1476,28 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
         } else {
             $ref = $coordinate;
         }
+        $thisRow = $cell->getRow();
+        $newColumn = $thisColumn = $cell->getColumn();
         if (is_array($calculatedValue)) {
             $attributes['t'] = 'array';
-            $rows = max(1, count($calculatedValue));
-            $cols = 1;
-            foreach ($calculatedValue as $row) {
-                $cols = max($cols, is_array($row) ? count($row) : 1);
+            $newRow = $row = $lastRow = $thisRow;
+            $column = $lastColumn = $thisColumn;
+            foreach ($calculatedValue as $resultRow) {
+                if (is_array($resultRow)) {
+                    $newColumn = $column;
+                    foreach ($resultRow as $resultValue) {
+                        $lastColumn = $newColumn;
+                        $lastRow = $newRow;
+                        ++$newColumn;
+                    }
+                    ++$newRow;
+                } else {
+                    $lastColumn = $newColumn;
+                    $lastRow = $newRow;
+                    ++$newColumn;
+                }
             }
-            $firstCellArray = Coordinate::indexesFromString($coordinate);
-            $lastRow = $firstCellArray[1] + $rows - 1;
-            $lastColumn = $firstCellArray[0] + $cols - 1;
-            $lastColumnString = Coordinate::stringFromColumnIndex($lastColumn);
-            $ref = "$coordinate:$lastColumnString$lastRow";
+            $ref = "$coordinate:$lastColumn$lastRow";
         }
         if (($attributes['t'] ?? null) === 'array') {
             $objWriter->startElement('f');
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatTest.php
new file mode 100644
index 0000000000..3e0c88f096
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatTest.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+
+class ConcatTest extends AllSetupTeardown
+{
+    /**
+     * @dataProvider providerCONCAT
+     */
+    public function testCONCAT(mixed $expectedResult, mixed ...$args): void
+    {
+        $this->mightHaveException($expectedResult);
+        $sheet = $this->getSheet();
+        $finalArg = '';
+        $row = 0;
+        foreach ($args as $arg) {
+            ++$row;
+            $this->setCell("A$row", $arg);
+            $finalArg = "A1:A$row";
+        }
+        $this->setCell('B1', "=CONCAT($finalArg)");
+        $result = $sheet->getCell('B1')->getCalculatedValue();
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public static function providerCONCAT(): array
+    {
+        return require 'tests/data/Calculation/TextData/CONCAT.php';
+    }
+
+    public function testConcatWithIndexMatch(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet1 = $spreadsheet->getActiveSheet();
+        $sheet1->setTitle('Formula');
+        $sheet1->fromArray(
+            [
+                ['Number', 'Formula'],
+                [52101293, '=CONCAT(INDEX(Lookup!B2, MATCH(A2, Lookup!A2, 0)))'],
+            ]
+        );
+        $sheet2 = $spreadsheet->createSheet();
+        $sheet2->setTitle('Lookup');
+        $sheet2->fromArray(
+            [
+                ['Lookup', 'Match'],
+                [52101293, 'PHP'],
+            ]
+        );
+        self::assertSame('PHP', $sheet1->getCell('B2')->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateRangeTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateRangeTest.php
new file mode 100644
index 0000000000..d4c6188963
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateRangeTest.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+
+class ConcatenateRangeTest extends AllSetupTeardown
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testIssue4061(): void
+    {
+        $sheet = $this->getSheet();
+        $sheet->getCell('A1')->setValue('a');
+        $sheet->getCell('A2')->setValue('b');
+        $sheet->getCell('A3')->setValue('c');
+        $sheet->getCell('C1')->setValue('1');
+        $sheet->getCell('C2')->setValue('2');
+        $sheet->getCell('C3')->setValue('3');
+        $sheet->getCell('B1')->setValue('=CONCATENATE(A1:A3, "-", C1:C3)');
+        self::assertSame('a-1', $sheet->getCell('B1')->getCalculatedValue());
+        $sheet->getCell('X1')->setValue('=A1:A3&"-"&C1:C3');
+        self::assertSame('a-1', $sheet->getCell('X1')->getCalculatedValue());
+        $sheet->getCell('D1')->setValue('=CONCAT(A1:A3, "-", C1:C3)');
+        self::assertSame('abc-123', $sheet->getCell('D1')->getCalculatedValue());
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $sheet->getCell('E1')->setValue('=CONCATENATE(A1:A3, "-", C1:C3)');
+        self::assertSame([['a-1'], ['b-2'], ['c-3']], $sheet->getCell('E1')->getCalculatedValue());
+        $sheet->getCell('Y1')->setValue('=A1:A3&"-"&C1:C3');
+        self::assertSame([['a-1'], ['b-2'], ['c-3']], $sheet->getCell('Y1')->getCalculatedValue());
+        $sheet->getCell('F1')->setValue('=CONCAT(A1:A3, "-", C1:C3)');
+        self::assertSame('abc-123', $sheet->getCell('F1')->getCalculatedValue());
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php
index cfe5662634..c70913ab33 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php
@@ -4,6 +4,7 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
 
+use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
 class ConcatenateTest extends AllSetupTeardown
@@ -16,13 +17,24 @@ public function testCONCATENATE(mixed $expectedResult, mixed ...$args): void
         $this->mightHaveException($expectedResult);
         $sheet = $this->getSheet();
         $finalArg = '';
+        $comma = '';
         $row = 0;
         foreach ($args as $arg) {
-            ++$row;
-            $this->setCell("A$row", $arg);
-            $finalArg = "A1:A$row";
+            $finalArg .= $comma;
+            $comma = ',';
+            if (is_bool($arg)) {
+                $finalArg .= $arg ? 'true' : 'false';
+            } elseif ($arg === 'A2') {
+                $finalArg .= 'A2';
+                $sheet->getCell('A2')->setValue('=2/0');
+            } elseif ($arg === 'A3') {
+                $finalArg .= 'A3';
+                $sheet->getCell('A3')->setValue(str_repeat('Ԁ', DataType::MAX_STRING_LENGTH - 5));
+            } else {
+                $finalArg .= '"' . (string) $arg . '"';
+            }
         }
-        $this->setCell('B1', "=CONCAT($finalArg)");
+        $this->setCell('B1', "=CONCATENATE($finalArg)");
         $result = $sheet->getCell('B1')->getCalculatedValue();
         self::assertEquals($expectedResult, $result);
     }
@@ -40,7 +52,7 @@ public function testConcatenateWithIndexMatch(): void
         $sheet1->fromArray(
             [
                 ['Number', 'Formula'],
-                [52101293, '=CONCAT(INDEX(Lookup!B2, MATCH(A2, Lookup!A2, 0)))'],
+                [52101293, '=CONCATENATE(INDEX(Lookup!B2, MATCH(A2, Lookup!A2, 0)))'],
             ]
         );
         $sheet2 = $spreadsheet->createSheet();
diff --git a/tests/PhpSpreadsheetTests/Calculation/XlfnFunctionsTest.php b/tests/PhpSpreadsheetTests/Calculation/XlfnFunctionsTest.php
index fbeb846223..1579cc0aac 100644
--- a/tests/PhpSpreadsheetTests/Calculation/XlfnFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/XlfnFunctionsTest.php
@@ -16,10 +16,10 @@ public function testXlfn(): void
     {
         $formulas = [
             // null indicates function not implemented in Calculation engine
-            ['2010', 'A1', '=MODE.SNGL({5.6,4,4,3,2,4})', '=_xlfn.MODE.SNGL({5.6,4,4,3,2,4})', 4],
-            ['2010', 'A2', '=MODE.SNGL({"x","y"})', '=_xlfn.MODE.SNGL({"x","y"})', '#N/A'],
-            ['2013', 'A1', '=ISOWEEKNUM("2019-12-19")', '=_xlfn.ISOWEEKNUM("2019-12-19")', 51],
-            ['2013', 'A2', '=SHEET("2019")', '=_xlfn.SHEET("2019")', null],
+            ['2010', 'A1', '=MODE.SNGL({5.6,4,4,3,2,4})', '=MODE.SNGL({5.6,4,4,3,2,4})', 4],
+            ['2010', 'A2', '=MODE.SNGL({"x","y"})', '=MODE.SNGL({"x","y"})', '#N/A'],
+            ['2013', 'A1', '=ISOWEEKNUM("2019-12-19")', '=ISOWEEKNUM("2019-12-19")', 51],
+            ['2013', 'A2', '=SHEET("2019")', '=SHEET("2019")', null],
             ['2013', 'A3', '2019-01-04', '2019-01-04', null],
             ['2013', 'A4', '2019-07-04', '2019-07-04', null],
             ['2013', 'A5', '2019-12-04', '2019-12-04', null],
@@ -27,10 +27,11 @@ public function testXlfn(): void
             ['2013', 'B4', 2, 2, null],
             ['2013', 'B5', -3, -3, null],
             // multiple xlfn functions interleaved with non-xlfn
-            ['2013', 'C3', '=ISOWEEKNUM(A3)+WEEKNUM(A4)+ISOWEEKNUM(A5)', '=_xlfn.ISOWEEKNUM(A3)+WEEKNUM(A4)+_xlfn.ISOWEEKNUM(A5)', 77],
-            ['2016', 'A1', '=SWITCH(WEEKDAY("2019-12-22",1),1,"Sunday",2,"Monday","No Match")', '=_xlfn.SWITCH(WEEKDAY("2019-12-22",1),1,"Sunday",2,"Monday","No Match")', 'Sunday'],
-            ['2016', 'B1', '=SWITCH(WEEKDAY("2019-12-20",1),1,"Sunday",2,"Monday","No Match")', '=_xlfn.SWITCH(WEEKDAY("2019-12-20",1),1,"Sunday",2,"Monday","No Match")', 'No Match'],
-            ['2019', 'A1', '=CONCAT("The"," ","sun"," ","will"," ","come"," ","up"," ","tomorrow.")', '=_xlfn.CONCAT("The"," ","sun"," ","will"," ","come"," ","up"," ","tomorrow.")', 'The sun will come up tomorrow.'],
+            ['2013', 'C3', '=ISOWEEKNUM(A3)+WEEKNUM(A4)+ISOWEEKNUM(A5)', '=ISOWEEKNUM(A3)+WEEKNUM(A4)+ISOWEEKNUM(A5)', 77],
+            ['2016', 'A1', '=SWITCH(WEEKDAY("2019-12-22",1),1,"Sunday",2,"Monday","No Match")', '=SWITCH(WEEKDAY("2019-12-22",1),1,"Sunday",2,"Monday","No Match")', 'Sunday'],
+            ['2016', 'B1', '=SWITCH(WEEKDAY("2019-12-20",1),1,"Sunday",2,"Monday","No Match")', '=SWITCH(WEEKDAY("2019-12-20",1),1,"Sunday",2,"Monday","No Match")', 'No Match'],
+            ['2019', 'A1', '=CONCAT("The"," ","sun"," ","will"," ","come"," ","up"," ","tomorrow.")', '=CONCAT("The"," ","sun"," ","will"," ","come"," ","up"," ","tomorrow.")', 'The sun will come up tomorrow.'],
+            ['365', 'A1', '=SORT({7;1;5})', '=SORT({7;1;5})', 1],
         ];
         $workbook = new Spreadsheet();
         $sheet = $workbook->getActiveSheet();
@@ -41,6 +42,8 @@ public function testXlfn(): void
         $sheet->setTitle('2016');
         $sheet = $workbook->createSheet();
         $sheet->setTitle('2019');
+        $sheet = $workbook->createSheet();
+        $sheet->setTitle('365');
 
         foreach ($formulas as $values) {
             $sheet = $workbook->setActiveSheetIndexByName($values[0]);
@@ -80,6 +83,32 @@ public function testXlfn(): void
         $oufil = File::temporaryFilename();
         $writer->save($oufil);
 
+        $file = "zip://$oufil#xl/worksheets/sheet1.xml";
+        $contents = (string) file_get_contents($file);
+        self::assertStringContainsString('<c r="A1"><f>_xlfn.MODE.SNGL({5.6,4,4,3,2,4})</f><v>4</v></c>', $contents);
+        self::assertStringContainsString('<c r="A2" t="e"><f>_xlfn.MODE.SNGL({&quot;x&quot;,&quot;y&quot;})</f><v>#N/A</v></c>', $contents);
+
+        $file = "zip://$oufil#xl/worksheets/sheet2.xml";
+        $contents = (string) file_get_contents($file);
+        self::assertStringContainsString('<c r="A1"><f>_xlfn.ISOWEEKNUM(&quot;2019-12-19&quot;)</f><v>51</v></c>', $contents);
+        self::assertStringContainsString('<c r="A2"><f>_xlfn.SHEET(&quot;2019&quot;)</f></c>', $contents);
+        self::assertStringContainsString('<c r="C3"><f>_xlfn.ISOWEEKNUM(A3)+WEEKNUM(A4)+_xlfn.ISOWEEKNUM(A5)</f><v>77</v></c>', $contents);
+        self::assertStringContainsString('<conditionalFormatting sqref="B3:B5"><cfRule type="expression" dxfId="0" priority="1"><formula>ABS(B3)&lt;2</formula></cfRule><cfRule type="expression" dxfId="1" priority="2"><formula>ABS(B3)&gt;2</formula></cfRule></conditionalFormatting>', $contents);
+        self::assertStringContainsString('<conditionalFormatting sqref="A3:A5"><cfRule type="expression" dxfId="2" priority="3"><formula>_xlfn.ISOWEEKNUM(A3)&lt;10</formula></cfRule><cfRule type="expression" dxfId="3" priority="4"><formula>_xlfn.ISOWEEKNUM(A3)&gt;40</formula></cfRule></conditionalFormatting>', $contents);
+
+        $file = "zip://$oufil#xl/worksheets/sheet3.xml";
+        $contents = (string) file_get_contents($file);
+        self::assertStringContainsString('<c r="A1" t="str"><f>_xlfn.SWITCH(WEEKDAY(&quot;2019-12-22&quot;,1),1,&quot;Sunday&quot;,2,&quot;Monday&quot;,&quot;No Match&quot;)</f><v>Sunday</v></c>', $contents);
+        self::assertStringContainsString('<c r="B1" t="str"><f>_xlfn.SWITCH(WEEKDAY(&quot;2019-12-20&quot;,1),1,&quot;Sunday&quot;,2,&quot;Monday&quot;,&quot;No Match&quot;)</f><v>No Match</v></c>', $contents);
+
+        $file = "zip://$oufil#xl/worksheets/sheet4.xml";
+        $contents = (string) file_get_contents($file);
+        self::assertStringContainsString('<c r="A1" t="str"><f>_xlfn.CONCAT(&quot;The&quot;,&quot; &quot;,&quot;sun&quot;,&quot; &quot;,&quot;will&quot;,&quot; &quot;,&quot;come&quot;,&quot; &quot;,&quot;up&quot;,&quot; &quot;,&quot;tomorrow.&quot;)</f><v>The sun will come up tomorrow.</v></c>', $contents);
+
+        $file = "zip://$oufil#xl/worksheets/sheet5.xml";
+        $contents = (string) file_get_contents($file);
+        self::assertStringContainsString('<c r="A1"><f>_xlfn._xlws.SORT({7;1;5})</f><v>1</v></c>', $contents);
+
         $reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader('Xlsx');
         $rdobj = $reader->load($oufil);
         unlink($oufil);
@@ -92,8 +121,8 @@ public function testXlfn(): void
         }
         $sheet = $rdobj->setActiveSheetIndexByName('2013');
         $cond = $sheet->getConditionalStyles('A3:A5');
-        self::assertEquals('_xlfn.ISOWEEKNUM(A3)<10', $cond[0]->getConditions()[0]);
-        self::assertEquals('_xlfn.ISOWEEKNUM(A3)>40', $cond[1]->getConditions()[0]);
+        self::assertEquals('ISOWEEKNUM(A3)<10', $cond[0]->getConditions()[0]);
+        self::assertEquals('ISOWEEKNUM(A3)>40', $cond[1]->getConditions()[0]);
         $cond = $sheet->getConditionalStyles('B3:B5');
         self::assertEquals('ABS(B3)<2', $cond[0]->getConditions()[0]);
         self::assertEquals('ABS(B3)>2', $cond[1]->getConditions()[0]);
diff --git a/tests/PhpSpreadsheetTests/Writer/Csv/CsvArrayTest.php b/tests/PhpSpreadsheetTests/Writer/Csv/CsvArrayTest.php
new file mode 100644
index 0000000000..834b193977
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Csv/CsvArrayTest.php
@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Csv;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class CsvArrayTest extends AbstractFunctional
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testArray(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue(1);
+        $sheet->getCell('A2')->setValue(1);
+        $sheet->getCell('A3')->setValue(3);
+        $sheet->getCell('B1')->setValue('=UNIQUE(A1:A3)');
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Csv');
+        $sheet = $reloadedSpreadsheet->getActiveSheet();
+        self::assertEquals('1', $sheet->getCell('A1')->getValue());
+        self::assertEquals('1', $sheet->getCell('A2')->getValue());
+        self::assertEquals('3', $sheet->getCell('A3')->getValue());
+        self::assertEquals('1', $sheet->getCell('B1')->getValue());
+        self::assertEquals('3', $sheet->getCell('B2')->getValue());
+        self::assertNull($sheet->getCell('B3')->getValue());
+        $spreadsheet->disconnectWorksheets();
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+
+    public function testInlineArrays(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue('=UNIQUE({1;1;2;1;3;2;4;4;4})');
+        $sheet->getCell('D1')->setValue('=UNIQUE({1,1,2,1,3,2,4,4,4},true)');
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Csv');
+        $sheet = $reloadedSpreadsheet->getActiveSheet();
+        $expected = [
+            ['1', null, null, '1', '2', '3', '4'],
+            ['2', null, null, null, null, null, null],
+            ['3', null, null, null, null, null, null],
+            ['4', null, null, null, null, null, null],
+        ];
+        self::assertSame($expected, $sheet->toArray());
+        $spreadsheet->disconnectWorksheets();
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Html/HtmlArrayTest.php b/tests/PhpSpreadsheetTests/Writer/Html/HtmlArrayTest.php
new file mode 100644
index 0000000000..665db3bffd
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Html/HtmlArrayTest.php
@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Html;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class HtmlArrayTest extends AbstractFunctional
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testArray(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue(1);
+        $sheet->getCell('A2')->setValue(1);
+        $sheet->getCell('A3')->setValue(3);
+        $sheet->getCell('B1')->setValue('=UNIQUE(A1:A3)');
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Html');
+        $sheet = $reloadedSpreadsheet->getActiveSheet();
+        self::assertEquals('1', $sheet->getCell('A1')->getValue());
+        self::assertEquals('1', $sheet->getCell('A2')->getValue());
+        self::assertEquals('3', $sheet->getCell('A3')->getValue());
+        self::assertEquals('1', $sheet->getCell('B1')->getValue());
+        self::assertEquals('3', $sheet->getCell('B2')->getValue());
+        self::assertNull($sheet->getCell('B3')->getValue());
+        $spreadsheet->disconnectWorksheets();
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+
+    public function testInlineArrays(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue('=UNIQUE({1;1;2;1;3;2;4;4;4})');
+        $sheet->getCell('D1')->setValue('=UNIQUE({1,1,2,1,3,2,4,4,4},true)');
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Csv');
+        $sheet = $reloadedSpreadsheet->getActiveSheet();
+        $expected = [
+            ['1', null, null, '1', '2', '3', '4'],
+            ['2', null, null, null, null, null, null],
+            ['3', null, null, null, null, null, null],
+            ['4', null, null, null, null, null, null],
+        ];
+        self::assertSame($expected, $sheet->toArray());
+        $spreadsheet->disconnectWorksheets();
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php b/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
new file mode 100644
index 0000000000..9f3271917b
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
@@ -0,0 +1,95 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Ods;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Writer\Ods;
+use PhpOffice\PhpSpreadsheet\Writer\Ods\Content;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class ArrayTest extends AbstractFunctional
+{
+    private string $arrayReturnType;
+
+    private string $samplesPath = 'tests/data/Writer/Ods';
+
+    private string $compatibilityMode;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->compatibilityMode = Functions::getCompatibilityMode();
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_OPENOFFICE);
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+        Functions::setCompatibilityMode($this->compatibilityMode);
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testArrayXml(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue(1);
+        $sheet->getCell('A2')->setValue(1);
+        $sheet->getCell('A3')->setValue(3);
+        $sheet->getCell('B1')->setValue('=UNIQUE(A1:A3)');
+
+        $content = new Content(new Ods($spreadsheet));
+        $xml = $content->write();
+        self::assertXmlStringEqualsXmlFile($this->samplesPath . '/content-arrays.xml', $xml);
+    }
+
+    public function testArray(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue(1);
+        $sheet->getCell('A2')->setValue(1);
+        $sheet->getCell('A3')->setValue(3);
+        $sheet->getCell('B1')->setValue('=UNIQUE(A1:A3)');
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Ods');
+        $sheet = $reloadedSpreadsheet->getActiveSheet();
+        self::assertEquals('1', $sheet->getCell('A1')->getValue());
+        self::assertEquals('1', $sheet->getCell('A2')->getValue());
+        self::assertEquals('3', $sheet->getCell('A3')->getValue());
+        self::assertEquals('3', $sheet->getCell('B2')->getValue());
+        self::assertNull($sheet->getCell('B3')->getValue());
+        self::assertEquals('=UNIQUE(A1:A3)', $sheet->getCell('B1')->getValue());
+        $spreadsheet->disconnectWorksheets();
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+
+    public function testInlineArrays(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue('=UNIQUE({1;1;2;1;3;2;4;4;4})');
+        $sheet->getCell('D1')->setValue('=UNIQUE({1,1,2,1,3,2,4,4,4},true)');
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Ods');
+        $spreadsheet->disconnectWorksheets();
+        $rsheet = $reloadedSpreadsheet->getActiveSheet();
+        $expected = [
+            ['=UNIQUE({1,1,2,1,3,2,4,4,4})', null, null, '=UNIQUE({1,1,2,1,3,2,4,4,4},true)', 2, 3, 4],
+            [2, null, null, null, null, null, null],
+            [3, null, null, null, null, null, null],
+            [4, null, null, null, null, null, null],
+        ];
+        self::assertSame($expected, $rsheet->toArray(null, false, false));
+        self::assertSame('1', $rsheet->getCell('A1')->getCalculatedValueString());
+        self::assertSame('1', $rsheet->getCell('D1')->getCalculatedValueString());
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Ods/ContentTest.php b/tests/PhpSpreadsheetTests/Writer/Ods/ContentTest.php
index 50e7bc7d58..a90e8ab73d 100644
--- a/tests/PhpSpreadsheetTests/Writer/Ods/ContentTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Ods/ContentTest.php
@@ -65,7 +65,7 @@ public function testWriteSpreadsheet(): void
 
         $worksheet1->setCellValueExplicit(
             'C2',
-            '=IF(A3, CONCATENATE(A1, " ", A2), CONCATENATE(A2, " ", A1))',
+            '=IF(A3, CONCAT(A1, " ", A2), CONCAT(A2, " ", A1))',
             DataType::TYPE_FORMULA
         ); // Formula
 
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsInlineTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsInlineTest.php
new file mode 100644
index 0000000000..e0b37921a6
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsInlineTest.php
@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Xlsx;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class ArrayFunctionsInlineTest extends AbstractFunctional
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testInlineArrays(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue('=UNIQUE({1;1;2;1;3;2;4;4;4})');
+        $sheet->getCell('D1')->setValue('=UNIQUE({1,1,2,1,3,2,4,4,4},true)');
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Xlsx');
+        $spreadsheet->disconnectWorksheets();
+        $rsheet = $reloadedSpreadsheet->getActiveSheet();
+        $expected = [
+            ['=UNIQUE({1;1;2;1;3;2;4;4;4})', null, null, '=UNIQUE({1,1,2,1,3,2,4,4,4},true)', 2, 3, 4],
+            [2, null, null, null, null, null, null],
+            [3, null, null, null, null, null, null],
+            [4, null, null, null, null, null, null],
+        ];
+        self::assertSame($expected, $rsheet->toArray(null, false, false));
+        self::assertSame('1', $rsheet->getCell('A1')->getCalculatedValueString());
+        self::assertSame('1', $rsheet->getCell('D1')->getCalculatedValueString());
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index bacd972a2e..0e70544691 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -275,7 +275,7 @@ public function testUnimplementedArrayOutput(): void
         $reader = new XlsxReader();
         $spreadsheet2 = $reader->load($this->outputFile);
         $sheet2 = $spreadsheet2->getActiveSheet();
-        self::assertSame('=_xlfn.CHOOSECOLS(A1:C5,3,1)', $sheet2->getCell('F1')->getValue());
+        self::assertSame('=CHOOSECOLS(A1:C5,3,1)', $sheet2->getCell('F1')->getValue());
         $expectedFG = [
             ['11', '1'],
             ['12', '2'],
diff --git a/tests/data/Calculation/TextData/CONCAT.php b/tests/data/Calculation/TextData/CONCAT.php
new file mode 100644
index 0000000000..c37c2ffcdb
--- /dev/null
+++ b/tests/data/Calculation/TextData/CONCAT.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+use PhpOffice\PhpSpreadsheet\Cell\DataType;
+
+return [
+    [
+        'ABCDEFGHIJ',
+        'ABCDE',
+        'FGHIJ',
+    ],
+    [
+        '123',
+        1,
+        2,
+        3,
+    ],
+    [
+        'Boolean-TRUE',
+        'Boolean',
+        '-',
+        true,
+    ],
+    'no arguments' => ['exception'],
+    'result just fits' => [
+        // Note use Armenian character below to make sure chars, not bytes
+        str_repeat('Ԁ', DataType::MAX_STRING_LENGTH - 5) . 'ABCDE',
+        str_repeat('Ԁ', DataType::MAX_STRING_LENGTH - 5),
+        'ABCDE',
+    ],
+    'result too long' => [
+        '#CALC!',
+        str_repeat('Ԁ', DataType::MAX_STRING_LENGTH - 5),
+        'abc',
+        '=A2',
+    ],
+    'propagate DIV0' => ['#DIV/0!', '1', '=2/0', '3'],
+];
diff --git a/tests/data/Calculation/TextData/CONCATENATE.php b/tests/data/Calculation/TextData/CONCATENATE.php
index c37c2ffcdb..4358fbeb51 100644
--- a/tests/data/Calculation/TextData/CONCATENATE.php
+++ b/tests/data/Calculation/TextData/CONCATENATE.php
@@ -26,14 +26,14 @@
     'result just fits' => [
         // Note use Armenian character below to make sure chars, not bytes
         str_repeat('Ԁ', DataType::MAX_STRING_LENGTH - 5) . 'ABCDE',
-        str_repeat('Ԁ', DataType::MAX_STRING_LENGTH - 5),
+        'A3',
         'ABCDE',
     ],
     'result too long' => [
         '#CALC!',
-        str_repeat('Ԁ', DataType::MAX_STRING_LENGTH - 5),
+        'A3',
         'abc',
-        '=A2',
+        'def',
     ],
-    'propagate DIV0' => ['#DIV/0!', '1', '=2/0', '3'],
+    'propagate DIV0' => ['#DIV/0!', '1', 'A2', '3'],
 ];
diff --git a/tests/data/Writer/Ods/content-arrays.xml b/tests/data/Writer/Ods/content-arrays.xml
new file mode 100644
index 0000000000..4bfe8dc619
--- /dev/null
+++ b/tests/data/Writer/Ods/content-arrays.xml
@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<office:document-content xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:presentation="urn:oasis:names:tc:opendocument:xmlns:presentation:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:ooow="http://openoffice.org/2004/writer" xmlns:oooc="http://openoffice.org/2004/calc" xmlns:dom="http://www.w3.org/2001/xml-events" xmlns:xforms="http://www.w3.org/2002/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rpt="http://openoffice.org/2005/report" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:grddl="http://www.w3.org/2003/g/data-view#" xmlns:tableooo="http://openoffice.org/2009/table" xmlns:field="urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0" xmlns:formx="urn:openoffice:names:experimental:ooxml-odf-interop:xmlns:form:1.0" xmlns:css3t="http://www.w3.org/TR/css3-text/" office:version="1.2"><office:scripts/><office:font-face-decls/><office:automatic-styles><style:style style:family="table" style:name="ta1"><style:table-properties table:display="true"/></style:style><style:style style:name="ce0" style:family="table-cell" style:parent-style-name="Default"><style:table-cell-properties style:vertical-align="bottom" style:rotation-align="none"/><style:paragraph-properties fo:text-align="start"/><style:text-properties fo:color="#000000" fo:font-family="Calibri" fo:font-size="11.0pt"/></style:style></office:automatic-styles><office:body><office:spreadsheet><table:calculation-settings/><table:table table:name="Worksheet" table:style-name="ta1"><office:forms/><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:style-name="ce0" table:formula="of:=UNIQUE([.A1:.A3])" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:number-columns-repeated="1022"/></table:table-row><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:style-name="ce0" office:value-type="float" office:value="3"><text:p>3</text:p></table:table-cell><table:table-cell table:number-columns-repeated="1022"/></table:table-row><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="3"><text:p>3</text:p></table:table-cell><table:table-cell table:style-name="ce0"/><table:table-cell table:number-columns-repeated="1022"/></table:table-row></table:table><table:named-expressions/></office:spreadsheet></office:body></office:document-content>
\ No newline at end of file
diff --git a/tests/data/Writer/Ods/content-with-data.xml b/tests/data/Writer/Ods/content-with-data.xml
index 12140fa926..82c67e7468 100644
--- a/tests/data/Writer/Ods/content-with-data.xml
+++ b/tests/data/Writer/Ods/content-with-data.xml
@@ -101,7 +101,7 @@
                     <table:table-cell office:value="" office:value-type="boolean" table:style-name="ce0">
                         <text:p/>
                     </table:table-cell>
-                    <table:table-cell office:value="1 1" office:value-type="string" table:formula="of:=IF([.A3]; CONCATENATE([.A1]; &quot; &quot;; [.A2]); CONCATENATE([.A2]; &quot; &quot;; [.A1]))" table:style-name="ce10">
+                    <table:table-cell office:value="1 1" office:value-type="string" table:formula="of:=IF([.A3]; CONCAT([.A1]; &quot; &quot;; [.A2]); CONCAT([.A2]; &quot; &quot;; [.A1]))" table:style-name="ce10">
                         <text:p>1 1</text:p>
                     </table:table-cell>
                     <table:table-cell office:value="42798.572060185" office:value-type="float" table:style-name="ce1">

From 784e8a0288998413531cb041af5a620c1c3645c3 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Fri, 14 Jun 2024 09:26:08 -0700
Subject: [PATCH 13/31] Drop Some Dead Code

---
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php                    | 2 +-
 .../Calculation/Functions/TextData/ConcatenateTest.php          | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 2afd0999b5..0c09ade0aa 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -1480,7 +1480,7 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
         $newColumn = $thisColumn = $cell->getColumn();
         if (is_array($calculatedValue)) {
             $attributes['t'] = 'array';
-            $newRow = $row = $lastRow = $thisRow;
+            $newRow = $lastRow = $thisRow;
             $column = $lastColumn = $thisColumn;
             foreach ($calculatedValue as $resultRow) {
                 if (is_array($resultRow)) {
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php
index c70913ab33..be3cbd1ed6 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php
@@ -18,7 +18,6 @@ public function testCONCATENATE(mixed $expectedResult, mixed ...$args): void
         $sheet = $this->getSheet();
         $finalArg = '';
         $comma = '';
-        $row = 0;
         foreach ($args as $arg) {
             $finalArg .= $comma;
             $comma = ',';

From d7700125faa36b055673dd50062c8214884d9aaf Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Mon, 17 Jun 2024 14:22:52 -0700
Subject: [PATCH 14/31] Spills

Implement SPILL for dynamic arrays. Calculating a dynamic array function will result in a SPILL error if it attempts to overlay a non-null cell which was not part of its previous calculation. Furthermore, it will set to null all cells which were part of its previous calculation but which are not part of the current one (i.e. one or both of the dimensions of the calculation is smaller than it had been); this should also apply for spills (whose result is reduced to 1*1).

Excel will stop you from changing the value in any cell in a dynamic array except the formula cell itself. I have not built this particular aspect into PhpSpreadsheet.

As usual, MS has taken some unusual steps here. If the result of a dynamic array calculation is #SPILL!, it will nevertheless be written to the xml as #VALUE!. It recognizes this situation by adding a new `vm` attribute to the cell, and expanding metadata.xml to recognize this.

A new optional parameter `$reduceArrays` is added to `toArray` and related functions. This will reduce a dynamic array to its first cell, which seems more useful than outputing it as an array (default).
---
 .../Calculation/Information/ExcelError.php    | 10 ++
 .../Calculation/TextData/Concatenate.php      |  3 +
 src/PhpSpreadsheet/Cell/Cell.php              | 91 +++++++++++++++++++
 src/PhpSpreadsheet/Reader/Ods.php             | 19 ++++
 src/PhpSpreadsheet/Reader/Xlsx.php            |  7 ++
 src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php |  2 +
 .../ConditionalFormatting/CellMatcher.php     |  2 +
 src/PhpSpreadsheet/Worksheet/Worksheet.php    | 27 ++++--
 src/PhpSpreadsheet/Writer/Ods/Content.php     | 18 ++++
 src/PhpSpreadsheet/Writer/Xlsx/Metadata.php   | 49 +++++++++-
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  | 40 ++++----
 .../TextData/ConcatenateGnumericTest.php      | 61 +++++++++++++
 .../Functional/ArrayFunctionsSpillTest.php    | 71 +++++++++++++++
 .../Reader/Ods/ArrayTest.php                  | 49 ++++++++++
 .../Writer/Ods/ArrayTest.php                  |  5 +
 .../Writer/Xlsx/ArrayFunctionsTest.php        | 22 +++++
 tests/data/Writer/Ods/content-arrays.xml      |  2 +-
 17 files changed, 445 insertions(+), 33 deletions(-)
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateGnumericTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Reader/Ods/ArrayTest.php

diff --git a/src/PhpSpreadsheet/Calculation/Information/ExcelError.php b/src/PhpSpreadsheet/Calculation/Information/ExcelError.php
index d9aabfd0a1..f4ea42d96c 100644
--- a/src/PhpSpreadsheet/Calculation/Information/ExcelError.php
+++ b/src/PhpSpreadsheet/Calculation/Information/ExcelError.php
@@ -152,4 +152,14 @@ public static function CALC(): string
     {
         return self::ERROR_CODES['calculation'];
     }
+
+    /**
+     * SPILL.
+     *
+     * @return string #SPILL!
+     */
+    public static function SPILL(): string
+    {
+        return self::ERROR_CODES['spill'];
+    }
 }
diff --git a/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php b/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
index 21f82ca1ea..62e9c38956 100644
--- a/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
+++ b/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
@@ -51,6 +51,9 @@ public static function CONCATENATE(...$args): string
      */
     public static function actualCONCATENATE(...$args): array|string
     {
+        if (Functions::getCompatibilityMode() === Functions::COMPATIBILITY_GNUMERIC) {
+            return self::CONCATENATE(...$args);
+        }
         $result = '';
         foreach ($args as $operand2) {
             $result = self::concatenate2Args($result, $operand2);
diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index ea46231b70..1368b656ab 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -61,6 +61,8 @@ class Cell implements Stringable
 
     /**
      * Attributes of the formula.
+     *
+     * @var null|array<string, string>
      */
     private mixed $formulaAttributes = null;
 
@@ -366,6 +368,18 @@ public function getCalculatedValueString(): string
     public function getCalculatedValue(bool $resetLog = true): mixed
     {
         $title = 'unknown';
+        $oldAttributes = $this->formulaAttributes;
+        $oldAttributesT = $oldAttributes['t'] ?? '';
+        $coordinate = $this->getCoordinate();
+        $oldAttributesRef = $oldAttributes['ref'] ?? $coordinate;
+        if (!str_contains($oldAttributesRef, ':')) {
+            $oldAttributesRef .= ":$oldAttributesRef";
+        }
+        $originalValue = $this->value;
+        $originalDataType = $this->dataType;
+        $this->formulaAttributes = [];
+        $spill = false;
+
         if ($this->dataType === DataType::TYPE_FORMULA) {
             try {
                 $thisworksheet = $this->getWorksheet();
@@ -397,8 +411,79 @@ public function getCalculatedValue(bool $resetLog = true): mixed
                 }
                 $newColumn = $this->getColumn();
                 if (is_array($result)) {
+                    $this->formulaAttributes['t'] = 'array';
+                    $this->formulaAttributes['ref'] = $maxCoordinate = $coordinate;
                     $newRow = $row = $this->getRow();
                     $column = $this->getColumn();
+                    foreach ($result as $resultRow) {
+                        if (is_array($resultRow)) {
+                            $newColumn = $column;
+                            foreach ($resultRow as $resultValue) {
+                                if ($row !== $newRow || $column !== $newColumn) {
+                                    $maxCoordinate = $newColumn . $newRow;
+                                    if ($thisworksheet->getCell($newColumn . $newRow)->getValue() !== null) {
+                                        if (!Coordinate::coordinateIsInsideRange($oldAttributesRef, $newColumn . $newRow)) {
+                                            $spill = true;
+
+                                            break;
+                                        }
+                                    }
+                                }
+                                ++$newColumn;
+                            }
+                            ++$newRow;
+                        } else {
+                            if ($row !== $newRow || $column !== $newColumn) {
+                                $maxCoordinate = $newColumn . $newRow;
+                                if ($thisworksheet->getCell($newColumn . $newRow)->getValue() !== null) {
+                                    if (!Coordinate::coordinateIsInsideRange($oldAttributesRef, $newColumn . $newRow)) {
+                                        $spill = true;
+                                    }
+                                }
+                            }
+                            ++$newColumn;
+                        }
+                        if ($spill) {
+                            break;
+                        }
+                    }
+                    if (!$spill) {
+                        $this->formulaAttributes['ref'] .= ":$maxCoordinate";
+                    }
+                    $thisworksheet->getCell($column . $row);
+                }
+                if (is_array($result)) {
+                    if ($oldAttributes !== null && Calculation::getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY) {
+                        if (($oldAttributesT) === 'array') {
+                            $thisworksheet = $this->getWorksheet();
+                            $coordinate = $this->getCoordinate();
+                            $ref = $oldAttributesRef;
+                            if (preg_match('/^([A-Z]{1,3})([0-9]{1,7})(:([A-Z]{1,3})([0-9]{1,7}))?$/', $ref, $matches) === 1) {
+                                if (isset($matches[3])) {
+                                    $minCol = $matches[1];
+                                    $minRow = (int) $matches[2];
+                                    $maxCol = $matches[4];
+                                    ++$maxCol;
+                                    $maxRow = (int) $matches[5];
+                                    for ($row = $minRow; $row <= $maxRow; ++$row) {
+                                        for ($col = $minCol; $col !== $maxCol; ++$col) {
+                                            if ("$col$row" !== $coordinate) {
+                                                $thisworksheet->getCell("$col$row")->setValue(null);
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                            $thisworksheet->getCell($coordinate);
+                        }
+                    }
+                }
+                if ($spill) {
+                    $result = ExcelError::SPILL();
+                }
+                if (is_array($result)) {
+                    $newRow = $row = $this->getRow();
+                    $newColumn = $column = $this->getColumn();
                     foreach ($result as $resultRow) {
                         if (is_array($resultRow)) {
                             $newColumn = $column;
@@ -417,6 +502,8 @@ public function getCalculatedValue(bool $resetLog = true): mixed
                         }
                     }
                     $thisworksheet->getCell($column . $row);
+                    $this->value = $originalValue;
+                    $this->dataType = $originalDataType;
                 }
             } catch (SpreadsheetException $ex) {
                 if (($ex->getMessage() === 'Unable to access External Workbook') && ($this->calculatedValue !== null)) {
@@ -808,6 +895,8 @@ public function setXfIndex(int $indexValue): self
     /**
      * Set the formula attributes.
      *
+     * @param $attributes null|array<string, string>
+     *
      * @return $this
      */
     public function setFormulaAttributes(mixed $attributes): self
@@ -819,6 +908,8 @@ public function setFormulaAttributes(mixed $attributes): self
 
     /**
      * Get the formula attributes.
+     *
+     * @return null|array<string, string>
      */
     public function getFormulaAttributes(): mixed
     {
diff --git a/src/PhpSpreadsheet/Reader/Ods.php b/src/PhpSpreadsheet/Reader/Ods.php
index ceb345dc3f..2214369bc8 100644
--- a/src/PhpSpreadsheet/Reader/Ods.php
+++ b/src/PhpSpreadsheet/Reader/Ods.php
@@ -425,11 +425,27 @@ public function loadIntoExisting(string $filename, Spreadsheet $spreadsheet): Sp
                                 $formatting = $hyperlink = null;
                                 $hasCalculatedValue = false;
                                 $cellDataFormula = '';
+                                $cellDataType = '';
+                                $cellDataRef = '';
 
                                 if ($cellData->hasAttributeNS($tableNs, 'formula')) {
                                     $cellDataFormula = $cellData->getAttributeNS($tableNs, 'formula');
                                     $hasCalculatedValue = true;
                                 }
+                                if ($cellData->hasAttributeNS($tableNs, 'number-matrix-columns-spanned')) {
+                                    if ($cellData->hasAttributeNS($tableNs, 'number-matrix-rows-spanned')) {
+                                        $cellDataType = 'array';
+                                        $arrayRow = (int) $cellData->getAttributeNS($tableNs, 'number-matrix-rows-spanned');
+                                        $arrayCol = (int) $cellData->getAttributeNS($tableNs, 'number-matrix-columns-spanned');
+                                        $lastRow = $rowID + $arrayRow - 1;
+                                        $lastCol = $columnID;
+                                        while ($arrayCol > 1) {
+                                            ++$lastCol;
+                                            --$arrayCol;
+                                        }
+                                        $cellDataRef = "$columnID$rowID:$lastCol$lastRow";
+                                    }
+                                }
 
                                 // Annotations
                                 $annotation = $cellData->getElementsByTagNameNS($officeNs, 'annotation');
@@ -590,6 +606,9 @@ public function loadIntoExisting(string $filename, Spreadsheet $spreadsheet): Sp
                                                 // Set value
                                                 if ($hasCalculatedValue) {
                                                     $cell->setValueExplicit($cellDataFormula, $type);
+                                                    if ($cellDataType === 'array') {
+                                                        $cell->setFormulaAttributes(['t' => 'array', 'ref' => $cellDataRef]);
+                                                    }
                                                 } else {
                                                     $cell->setValueExplicit($dataValue, $type);
                                                 }
diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
index e628a8d2bb..e976fd8360 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -2,6 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Reader;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
 use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Cell\Hyperlink;
@@ -884,6 +885,12 @@ protected function loadSpreadsheetFromFile(string $filename): Spreadsheet
                                                 } else {
                                                     // Formula
                                                     $this->castToFormula($c, $r, $cellDataType, $value, $calculatedValue, 'castToError');
+                                                    $eattr = $c->attributes();
+                                                    if (isset($eattr['vm'])) {
+                                                        if ($calculatedValue === ExcelError::VALUE()) {
+                                                            $calculatedValue = ExcelError::SPILL();
+                                                        }
+                                                    }
                                                 }
 
                                                 break;
diff --git a/src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php b/src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php
index 114fbe8004..7356cd8829 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx/Namespaces.php
@@ -119,4 +119,6 @@ class Namespaces
     const PURL_WORKSHEET = 'http://purl.oclc.org/ooxml/officeDocument/relationships/worksheet';
 
     const DYNAMIC_ARRAY = 'http://schemas.microsoft.com/office/spreadsheetml/2017/dynamicarray';
+
+    const DYNAMIC_ARRAY_RICHDATA = 'http://schemas.microsoft.com/office/spreadsheetml/2017/richdata';
 }
diff --git a/src/PhpSpreadsheet/Style/ConditionalFormatting/CellMatcher.php b/src/PhpSpreadsheet/Style/ConditionalFormatting/CellMatcher.php
index 2a279075ed..e14ceacdca 100644
--- a/src/PhpSpreadsheet/Style/ConditionalFormatting/CellMatcher.php
+++ b/src/PhpSpreadsheet/Style/ConditionalFormatting/CellMatcher.php
@@ -131,6 +131,8 @@ protected function wrapValue(mixed $value): float|int|string
 
     protected function wrapCellValue(): float|int|string
     {
+        $this->cell = $this->worksheet->getCell([$this->cellColumn, $this->cellRow]);
+
         return $this->wrapValue($this->cell->getCalculatedValue());
     }
 
diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
index 5ea798f3f2..08fc46be7d 100644
--- a/src/PhpSpreadsheet/Worksheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -2848,12 +2848,13 @@ public function rangeToArray(
         bool $calculateFormulas = true,
         bool $formatData = true,
         bool $returnCellRef = false,
-        bool $ignoreHidden = false
+        bool $ignoreHidden = false,
+        bool $reduceArrays = false
     ): array {
         $returnValue = [];
 
         // Loop through rows
-        foreach ($this->rangeToArrayYieldRows($range, $nullValue, $calculateFormulas, $formatData, $returnCellRef, $ignoreHidden) as $rowRef => $rowArray) {
+        foreach ($this->rangeToArrayYieldRows($range, $nullValue, $calculateFormulas, $formatData, $returnCellRef, $ignoreHidden, $reduceArrays) as $rowRef => $rowArray) {
             $returnValue[$rowRef] = $rowArray;
         }
 
@@ -2880,7 +2881,8 @@ public function rangeToArrayYieldRows(
         bool $calculateFormulas = true,
         bool $formatData = true,
         bool $returnCellRef = false,
-        bool $ignoreHidden = false
+        bool $ignoreHidden = false,
+        bool $reduceArrays = false
     ) {
         $range = Validations::validateCellOrCellRange($range);
 
@@ -2926,6 +2928,11 @@ public function rangeToArrayYieldRows(
                         $cell = $this->cellCollection->get("{$col}{$thisRow}");
                         if ($cell !== null) {
                             $value = $this->cellToArray($cell, $calculateFormulas, $formatData, $nullValue);
+                            if ($reduceArrays) {
+                                while (is_array($value)) {
+                                    $value = array_shift($value);
+                                }
+                            }
                             if ($value !== $nullValue) {
                                 $returnValue[$columnRef] = $value;
                             }
@@ -3026,7 +3033,8 @@ public function namedRangeToArray(
         bool $calculateFormulas = true,
         bool $formatData = true,
         bool $returnCellRef = false,
-        bool $ignoreHidden = false
+        bool $ignoreHidden = false,
+        bool $reduceArrays = false
     ): array {
         $retVal = [];
         $namedRange = $this->validateNamedRange($definedName);
@@ -3035,7 +3043,7 @@ public function namedRangeToArray(
             $cellRange = str_replace('$', '', $cellRange);
             $workSheet = $namedRange->getWorksheet();
             if ($workSheet !== null) {
-                $retVal = $workSheet->rangeToArray($cellRange, $nullValue, $calculateFormulas, $formatData, $returnCellRef, $ignoreHidden);
+                $retVal = $workSheet->rangeToArray($cellRange, $nullValue, $calculateFormulas, $formatData, $returnCellRef, $ignoreHidden, $reduceArrays);
             }
         }
 
@@ -3058,7 +3066,8 @@ public function toArray(
         bool $calculateFormulas = true,
         bool $formatData = true,
         bool $returnCellRef = false,
-        bool $ignoreHidden = false
+        bool $ignoreHidden = false,
+        bool $reduceArrays = false
     ): array {
         // Garbage collect...
         $this->garbageCollect();
@@ -3068,7 +3077,7 @@ public function toArray(
         $maxRow = $this->getHighestRow();
 
         // Return
-        return $this->rangeToArray("A1:{$maxCol}{$maxRow}", $nullValue, $calculateFormulas, $formatData, $returnCellRef, $ignoreHidden);
+        return $this->rangeToArray("A1:{$maxCol}{$maxRow}", $nullValue, $calculateFormulas, $formatData, $returnCellRef, $ignoreHidden, $reduceArrays);
     }
 
     /**
@@ -3679,7 +3688,9 @@ public function calculateArrays(bool $preCalculateFormulas = true): void
         if ($preCalculateFormulas && Calculation::getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY) {
             $keys = $this->cellCollection->getCoordinates();
             foreach ($keys as $key) {
-                $this->getCell($key)->getCalculatedValue();
+                if ($this->getCell($key)->getDataType() === DataType::TYPE_FORMULA) {
+                    $this->getCell($key)->getCalculatedValue();
+                }
             }
         }
     }
diff --git a/src/PhpSpreadsheet/Writer/Ods/Content.php b/src/PhpSpreadsheet/Writer/Ods/Content.php
index 7cbcc42fd1..a8c606fc56 100644
--- a/src/PhpSpreadsheet/Writer/Ods/Content.php
+++ b/src/PhpSpreadsheet/Writer/Ods/Content.php
@@ -196,6 +196,8 @@ private function writeCells(XMLWriter $objWriter, RowCellIterator $cells): void
         foreach ($cells as $cell) {
             /** @var Cell $cell */
             $column = Coordinate::columnIndexFromString($cell->getColumn()) - 1;
+            $attributes = $cell->getFormulaAttributes() ?? [];
+            $coordinate = $cell->getCoordinate();
 
             $this->writeCellSpan($objWriter, $column, $prevColumn);
             $objWriter->startElement('table:table-cell');
@@ -230,6 +232,22 @@ private function writeCells(XMLWriter $objWriter, RowCellIterator $cells): void
                             // don't do anything
                         }
                     }
+                    if (isset($attributes['ref'])) {
+                        if (preg_match('/^([A-Z]{1,3})([0-9]{1,7})(:([A-Z]{1,3})([0-9]{1,7}))?$/', (string) $attributes['ref'], $matches) == 1) {
+                            $matrixRowSpan = 1;
+                            $matrixColSpan = 1;
+                            if (isset($matches[3])) {
+                                $minRow = (int) $matches[2];
+                                $maxRow = (int) $matches[5];
+                                $matrixRowSpan = $maxRow - $minRow + 1;
+                                $minCol = Coordinate::columnIndexFromString($matches[1]);
+                                $maxCol = Coordinate::columnIndexFromString($matches[4]);
+                                $matrixColSpan = $maxCol - $minCol + 1;
+                            }
+                            $objWriter->writeAttribute('table:number-matrix-columns-spanned', "$matrixColSpan");
+                            $objWriter->writeAttribute('table:number-matrix-rows-spanned', "$matrixRowSpan");
+                        }
+                    }
                     $objWriter->writeAttribute('table:formula', $this->formulaConvertor->convertFormula($cell->getValueString()));
                     if (is_numeric($formulaValue)) {
                         $objWriter->writeAttribute('office:value-type', 'float');
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php b/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php
index 67b5a840a6..00c15f0003 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Metadata.php
@@ -31,10 +31,12 @@ public function writeMetadata(): string
         // Types
         $objWriter->startElement('metadata');
         $objWriter->writeAttribute('xmlns', Namespaces::MAIN);
+        $objWriter->writeAttribute('xmlns:xlrd', Namespaces::DYNAMIC_ARRAY_RICHDATA);
         $objWriter->writeAttribute('xmlns:xda', Namespaces::DYNAMIC_ARRAY);
 
         $objWriter->startElement('metadataTypes');
-        $objWriter->writeAttribute('count', '1');
+        $objWriter->writeAttribute('count', '2');
+
         $objWriter->startElement('metadataType');
         $objWriter->writeAttribute('name', 'XLDAPR');
         $objWriter->writeAttribute('minSupportedVersion', '120000');
@@ -49,7 +51,23 @@ public function writeMetadata(): string
         $objWriter->writeAttribute('assign', '1');
         $objWriter->writeAttribute('coerce', '1');
         $objWriter->writeAttribute('cellMeta', '1');
-        $objWriter->endElement(); // metadataType
+        $objWriter->endElement(); // metadataType XLDAPR
+
+        $objWriter->startElement('metadataType');
+        $objWriter->writeAttribute('name', 'XLRICHVALUE');
+        $objWriter->writeAttribute('minSupportedVersion', '120000');
+        $objWriter->writeAttribute('copy', '1');
+        $objWriter->writeAttribute('pasteAll', '1');
+        $objWriter->writeAttribute('pasteValues', '1');
+        $objWriter->writeAttribute('merge', '1');
+        $objWriter->writeAttribute('splitFirst', '1');
+        $objWriter->writeAttribute('rowColShift', '1');
+        $objWriter->writeAttribute('clearFormats', '1');
+        $objWriter->writeAttribute('clearComments', '1');
+        $objWriter->writeAttribute('assign', '1');
+        $objWriter->writeAttribute('coerce', '1');
+        $objWriter->endElement(); // metadataType XLRICHVALUE
+
         $objWriter->endElement(); // metadataTypes
 
         $objWriter->startElement('futureMetadata');
@@ -66,7 +84,22 @@ public function writeMetadata(): string
         $objWriter->endElement(); // ext
         $objWriter->endElement(); // extLst
         $objWriter->endElement(); // bk
-        $objWriter->endElement(); // futureMetadata
+        $objWriter->endElement(); // futureMetadata XLDAPR
+
+        $objWriter->startElement('futureMetadata');
+        $objWriter->writeAttribute('name', 'XLRICHVALUE');
+        $objWriter->writeAttribute('count', '1');
+        $objWriter->startElement('bk');
+        $objWriter->startElement('extLst');
+        $objWriter->startElement('ext');
+        $objWriter->writeAttribute('uri', '{3e2802c4-a4d2-4d8b-9148-e3be6c30e623}');
+        $objWriter->startElement('xlrd:rvb');
+        $objWriter->writeAttribute('i', '0');
+        $objWriter->endElement(); // xlrd:rvb
+        $objWriter->endElement(); // ext
+        $objWriter->endElement(); // extLst
+        $objWriter->endElement(); // bk
+        $objWriter->endElement(); // futureMetadata XLRICHVALUE
 
         $objWriter->startElement('cellMetadata');
         $objWriter->writeAttribute('count', '1');
@@ -78,6 +111,16 @@ public function writeMetadata(): string
         $objWriter->endElement(); // bk
         $objWriter->endElement(); // cellMetadata
 
+        $objWriter->startElement('valueMetadata');
+        $objWriter->writeAttribute('count', '1');
+        $objWriter->startElement('bk');
+        $objWriter->startElement('rc');
+        $objWriter->writeAttribute('t', '2');
+        $objWriter->writeAttribute('v', '0');
+        $objWriter->endElement(); // rc
+        $objWriter->endElement(); // bk
+        $objWriter->endElement(); // valueMetadata
+
         $objWriter->endElement(); // metadata
 
         // Return
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 0c09ade0aa..5972f3a4d7 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
 use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
@@ -1452,7 +1453,24 @@ private function writeCellError(XMLWriter $objWriter, string $mappedType, string
 
     private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell $cell): void
     {
+        $attributes = $cell->getFormulaAttributes() ?? [];
+        $coordinate = $cell->getCoordinate();
         $calculatedValue = $this->getParentWriter()->getPreCalculateFormulas() ? $cell->getCalculatedValue() : $cellValue;
+        if ($calculatedValue === ExcelError::SPILL()) {
+            $objWriter->writeAttribute('t', 'e');
+            //$objWriter->writeAttribute('cm', '1'); // already added
+            $objWriter->writeAttribute('vm', '1');
+            $objWriter->startElement('f');
+            $objWriter->writeAttribute('t', 'array');
+            $objWriter->writeAttribute('aca', '1');
+            $objWriter->writeAttribute('ref', $coordinate);
+            $objWriter->writeAttribute('ca', '1');
+            $objWriter->text(FunctionPrefix::addFunctionPrefixStripEquals($cellValue));
+            $objWriter->endElement(); // f
+            $objWriter->writeElement('v', ExcelError::VALUE()); // note #VALUE! in xml even though error is #SPILL!
+
+            return;
+        }
         $calculatedValueString = $this->getParentWriter()->getPreCalculateFormulas() ? $cell->getCalculatedValueString() : $cellValue;
         if (is_string($calculatedValue)) {
             if (ErrorValue::isError($calculatedValue)) {
@@ -1469,8 +1487,6 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
             $calculatedValueString = (string) $calculatedValue;
         }
 
-        $attributes = $cell->getFormulaAttributes() ?? [];
-        $coordinate = $cell->getCoordinate();
         if (isset($attributes['ref'])) {
             $ref = $this->parseRef($coordinate, $attributes['ref']);
         } else {
@@ -1480,24 +1496,6 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
         $newColumn = $thisColumn = $cell->getColumn();
         if (is_array($calculatedValue)) {
             $attributes['t'] = 'array';
-            $newRow = $lastRow = $thisRow;
-            $column = $lastColumn = $thisColumn;
-            foreach ($calculatedValue as $resultRow) {
-                if (is_array($resultRow)) {
-                    $newColumn = $column;
-                    foreach ($resultRow as $resultValue) {
-                        $lastColumn = $newColumn;
-                        $lastRow = $newRow;
-                        ++$newColumn;
-                    }
-                    ++$newRow;
-                } else {
-                    $lastColumn = $newColumn;
-                    $lastRow = $newRow;
-                    ++$newColumn;
-                }
-            }
-            $ref = "$coordinate:$lastColumn$lastRow";
         }
         if (($attributes['t'] ?? null) === 'array') {
             $objWriter->startElement('f');
@@ -1622,7 +1620,7 @@ private function writeCell(XMLWriter $objWriter, PhpspreadsheetWorksheet $worksh
             }
         }
 
-        $objWriter->endElement();
+        $objWriter->endElement(); // c
     }
 
     /**
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateGnumericTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateGnumericTest.php
new file mode 100644
index 0000000000..2b4f12a2f7
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateGnumericTest.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+
+class ConcatenateGnumericTest extends AllSetupTeardown
+{
+    /**
+     * Gnumeric, unlike Excel or LibreOffice, implements CONCATENATE like CONCAT.
+     *
+     * @dataProvider providerCONCAT
+     */
+    public function testCONCATENATE(mixed $expectedResult, mixed ...$args): void
+    {
+        self::setGnumeric();
+        $this->mightHaveException($expectedResult);
+        $sheet = $this->getSheet();
+        $finalArg = '';
+        $row = 0;
+        foreach ($args as $arg) {
+            ++$row;
+            $this->setCell("A$row", $arg);
+            $finalArg = "A1:A$row";
+        }
+        $this->setCell('B1', "=CONCATENATE($finalArg)");
+        $result = $sheet->getCell('B1')->getCalculatedValue();
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public static function providerCONCAT(): array
+    {
+        return require 'tests/data/Calculation/TextData/CONCAT.php';
+    }
+
+    public function testConcatWithIndexMatch(): void
+    {
+        self::setGnumeric();
+        $spreadsheet = new Spreadsheet();
+        $sheet1 = $spreadsheet->getActiveSheet();
+        $sheet1->setTitle('Formula');
+        $sheet1->fromArray(
+            [
+                ['Number', 'Formula'],
+                [52101293, '=CONCATENATE(INDEX(Lookup!B2, MATCH(A2, Lookup!A2, 0)))'],
+            ]
+        );
+        $sheet2 = $spreadsheet->createSheet();
+        $sheet2->setTitle('Lookup');
+        $sheet2->fromArray(
+            [
+                ['Lookup', 'Match'],
+                [52101293, 'PHP'],
+            ]
+        );
+        self::assertSame('PHP', $sheet1->getCell('B2')->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
new file mode 100644
index 0000000000..ca1a56e535
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Functional;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PHPUnit\Framework\TestCase;
+
+class ArrayFunctionsSpillTest extends TestCase
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testArrayOutput(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $calculation = Calculation::getInstance($spreadsheet);
+
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->setCellValue('B5', 'OCCUPIED');
+
+        $columnArray = [[1], [2], [2], [2], [3], [3], [3], [3], [4], [4], [4], [5]];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
+        $expected = [['#SPILL!'], [null], [null], [null], ['OCCUPIED']];
+        self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'spill with B5 unchanged');
+        $calculation->clearCalculationCache();
+
+        $columnArray = [[1], [2], [2], [2], [3], [3], [3], [3], [4], [4], [4], [4]];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
+        $expected = [[1], [2], [3], [4], ['OCCUPIED']];
+        self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'fill B1:B4 with B5 unchanged');
+        $calculation->clearCalculationCache();
+
+        $columnArray = [[1], [3], [3], [3], [3], [3], [3], [3], [3], [3], [3], [3]];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
+        $expected = [[1], [3], [null], [null], ['OCCUPIED']];
+        self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'fill B1:B2(changed from prior) set B3:B4 to null B5 unchanged');
+        $calculation->clearCalculationCache();
+
+        $columnArray = [[1], [2], [3], [3], [3], [3], [3], [3], [3], [3], [3], [3]];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
+        $expected = [[1], [2], [3], [null], ['OCCUPIED']];
+        self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'fill B1:B3(B2 changed from prior) set B4 to null B5 unchanged');
+        $calculation->clearCalculationCache();
+
+        $columnArray = [[1], [2], [2], [2], [3], [3], [3], [3], [4], [4], [4], [5]];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
+        $expected = [['#SPILL!'], [null], [null], [null], ['OCCUPIED']];
+        self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'spill clears B2:B4 with B5 unchanged');
+        $calculation->clearCalculationCache();
+
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Reader/Ods/ArrayTest.php b/tests/PhpSpreadsheetTests/Reader/Ods/ArrayTest.php
new file mode 100644
index 0000000000..1d53845b4b
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Reader/Ods/ArrayTest.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Ods;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class ArrayTest extends AbstractFunctional
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testSaveAndLoadHyperlinks(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheetOld = new Spreadsheet();
+        $sheet = $spreadsheetOld->getActiveSheet();
+        $sheet->getCell('A1')->setValue('a');
+        $sheet->getCell('A2')->setValue('b');
+        $sheet->getCell('A3')->setValue('c');
+        $sheet->getCell('C1')->setValue(1);
+        $sheet->getCell('C2')->setValue(2);
+        $sheet->getCell('C3')->setValue(3);
+        $sheet->getCell('B1')->setValue('=CONCATENATE(A1:A3,"-",C1:C3)');
+        $spreadsheet = $this->writeAndReload($spreadsheetOld, 'Ods');
+        $spreadsheetOld->disconnectWorksheets();
+
+        $newSheet = $spreadsheet->getActiveSheet();
+        self::assertSame(['t' => 'array', 'ref' => 'B1:B3'], $newSheet->getCell('B1')->getFormulaAttributes());
+        self::assertSame('a-1', $newSheet->getCell('B1')->getOldCalculatedValue());
+        self::assertSame('b-2', $newSheet->getCell('B2')->getValue());
+        self::assertSame('c-3', $newSheet->getCell('B3')->getValue());
+        self::assertSame('=CONCATENATE(A1:A3,"-",C1:C3)', $newSheet->getCell('B1')->getValue());
+
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php b/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
index 9f3271917b..07f945477a 100644
--- a/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
@@ -19,6 +19,8 @@ class ArrayTest extends AbstractFunctional
 
     private string $compatibilityMode;
 
+    private bool $skipInline = true;
+
     protected function setUp(): void
     {
         parent::setUp();
@@ -73,6 +75,9 @@ public function testArray(): void
 
     public function testInlineArrays(): void
     {
+        if ($this->skipInline) {
+            self::markTestIncomplete('Ods Reader/Writer alter commas and semi-colons within formulas, interfering with inline arrays');
+        }
         Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
         $sheet = $spreadsheet->getActiveSheet();
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index 0e70544691..d7265651d8 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -352,4 +352,26 @@ public function testMetadataWritten(): void
         self::assertSame('', $writerMetadata2->writeMetaData());
         $spreadsheet->disconnectWorksheets();
     }
+
+    public function testSpill(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A3')->setValue('x');
+        $sheet->getCell('A1')->setValue('=UNIQUE({1;2;3})');
+        $writer = new XlsxWriter($spreadsheet);
+        $this->outputFile = File::temporaryFilename();
+        $writer->save($this->outputFile);
+        $spreadsheet->disconnectWorksheets();
+
+        $reader = new XlsxReader();
+        $spreadsheet2 = $reader->load($this->outputFile);
+        $sheet2 = $spreadsheet2->getActiveSheet();
+        self::assertSame('#SPILL!', $sheet2->getCell('A1')->getOldCalculatedValue());
+        self::assertSame('=UNIQUE({1;2;3})', $sheet2->getCell('A1')->getValue());
+        self::assertNull($sheet2->getCell('A2')->getValue());
+        self::assertSame('x', $sheet2->getCell('A3')->getValue());
+        $spreadsheet2->disconnectWorksheets();
+    }
 }
diff --git a/tests/data/Writer/Ods/content-arrays.xml b/tests/data/Writer/Ods/content-arrays.xml
index 4bfe8dc619..a33b7dbfca 100644
--- a/tests/data/Writer/Ods/content-arrays.xml
+++ b/tests/data/Writer/Ods/content-arrays.xml
@@ -1,2 +1,2 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<office:document-content xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:presentation="urn:oasis:names:tc:opendocument:xmlns:presentation:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:ooow="http://openoffice.org/2004/writer" xmlns:oooc="http://openoffice.org/2004/calc" xmlns:dom="http://www.w3.org/2001/xml-events" xmlns:xforms="http://www.w3.org/2002/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rpt="http://openoffice.org/2005/report" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:grddl="http://www.w3.org/2003/g/data-view#" xmlns:tableooo="http://openoffice.org/2009/table" xmlns:field="urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0" xmlns:formx="urn:openoffice:names:experimental:ooxml-odf-interop:xmlns:form:1.0" xmlns:css3t="http://www.w3.org/TR/css3-text/" office:version="1.2"><office:scripts/><office:font-face-decls/><office:automatic-styles><style:style style:family="table" style:name="ta1"><style:table-properties table:display="true"/></style:style><style:style style:name="ce0" style:family="table-cell" style:parent-style-name="Default"><style:table-cell-properties style:vertical-align="bottom" style:rotation-align="none"/><style:paragraph-properties fo:text-align="start"/><style:text-properties fo:color="#000000" fo:font-family="Calibri" fo:font-size="11.0pt"/></style:style></office:automatic-styles><office:body><office:spreadsheet><table:calculation-settings/><table:table table:name="Worksheet" table:style-name="ta1"><office:forms/><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:style-name="ce0" table:formula="of:=UNIQUE([.A1:.A3])" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:number-columns-repeated="1022"/></table:table-row><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:style-name="ce0" office:value-type="float" office:value="3"><text:p>3</text:p></table:table-cell><table:table-cell table:number-columns-repeated="1022"/></table:table-row><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="3"><text:p>3</text:p></table:table-cell><table:table-cell table:style-name="ce0"/><table:table-cell table:number-columns-repeated="1022"/></table:table-row></table:table><table:named-expressions/></office:spreadsheet></office:body></office:document-content>
\ No newline at end of file
+<office:document-content xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:presentation="urn:oasis:names:tc:opendocument:xmlns:presentation:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:ooow="http://openoffice.org/2004/writer" xmlns:oooc="http://openoffice.org/2004/calc" xmlns:dom="http://www.w3.org/2001/xml-events" xmlns:xforms="http://www.w3.org/2002/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rpt="http://openoffice.org/2005/report" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:grddl="http://www.w3.org/2003/g/data-view#" xmlns:tableooo="http://openoffice.org/2009/table" xmlns:field="urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0" xmlns:formx="urn:openoffice:names:experimental:ooxml-odf-interop:xmlns:form:1.0" xmlns:css3t="http://www.w3.org/TR/css3-text/" office:version="1.2"><office:scripts/><office:font-face-decls/><office:automatic-styles><style:style style:family="table" style:name="ta1"><style:table-properties table:display="true"/></style:style><style:style style:name="ce0" style:family="table-cell" style:parent-style-name="Default"><style:table-cell-properties style:vertical-align="bottom" style:rotation-align="none"/><style:paragraph-properties fo:text-align="start"/><style:text-properties fo:color="#000000" fo:font-family="Calibri" fo:font-size="11.0pt"/></style:style></office:automatic-styles><office:body><office:spreadsheet><table:calculation-settings/><table:table table:name="Worksheet" table:style-name="ta1"><office:forms/><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:style-name="ce0" table:number-matrix-columns-spanned="1" table:number-matrix-rows-spanned="2" table:formula="of:=UNIQUE([.A1:.A3])" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:number-columns-repeated="1022"/></table:table-row><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="1"><text:p>1</text:p></table:table-cell><table:table-cell table:style-name="ce0" office:value-type="float" office:value="3"><text:p>3</text:p></table:table-cell><table:table-cell table:number-columns-repeated="1022"/></table:table-row><table:table-row><table:table-cell table:style-name="ce0" office:value-type="float" office:value="3"><text:p>3</text:p></table:table-cell><table:table-cell table:style-name="ce0"/><table:table-cell table:number-columns-repeated="1022"/></table:table-row></table:table><table:named-expressions/></office:spreadsheet></office:body></office:document-content>
\ No newline at end of file

From 8609b78e53af482a71e0e161555bceffbda2b2e6 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Mon, 17 Jun 2024 15:19:55 -0700
Subject: [PATCH 15/31] Eliminate Dead Code

---
 src/PhpSpreadsheet/Writer/Ods/Content.php    | 1 -
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php | 2 --
 2 files changed, 3 deletions(-)

diff --git a/src/PhpSpreadsheet/Writer/Ods/Content.php b/src/PhpSpreadsheet/Writer/Ods/Content.php
index a8c606fc56..a03d3f039c 100644
--- a/src/PhpSpreadsheet/Writer/Ods/Content.php
+++ b/src/PhpSpreadsheet/Writer/Ods/Content.php
@@ -197,7 +197,6 @@ private function writeCells(XMLWriter $objWriter, RowCellIterator $cells): void
             /** @var Cell $cell */
             $column = Coordinate::columnIndexFromString($cell->getColumn()) - 1;
             $attributes = $cell->getFormulaAttributes() ?? [];
-            $coordinate = $cell->getCoordinate();
 
             $this->writeCellSpan($objWriter, $column, $prevColumn);
             $objWriter->startElement('table:table-cell');
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 5972f3a4d7..8daf0d7f50 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -1492,8 +1492,6 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
         } else {
             $ref = $coordinate;
         }
-        $thisRow = $cell->getRow();
-        $newColumn = $thisColumn = $cell->getColumn();
         if (is_array($calculatedValue)) {
             $attributes['t'] = 'array';
         }

From 2c9e2e2b43d41c0706469c336e4f55a0963dc9be Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 20 Jun 2024 00:43:03 -0700
Subject: [PATCH 16/31] Spill Operator

Spill operator now works both as trailing `#` and ARRAYANCHOR function. `#` is converted to ARRAYANCHOR when writing. I do not think it is important to convert the other way when reading.

Documentation updates have started, but are a work in progress.

SINGLE function is implemented. I believe it works correctly when referring to a cell, but not when referring to a cell range. No attempt is yet made to convert leading `@` to and from SINGLE; I haven't figured out how to do so without interfering with `@` in structured references.

ISREF has problems. At least one of its tests was wrong, and many of those that were right were so accidentally. The code is changed, quite kludgily, so that almost all the tests are now deliberately correct. One very complicated test is incorrect; for now, I will skip it, and will open an issue when this PR is merged.
---
 docs/references/function-list-by-category.md  |   9 +-
 docs/references/function-list-by-name.md      |   4 +-
 docs/topics/calculation-engine.md             |  22 ++-
 .../12-CalculationEngine-Array-Formula-2.png  | Bin 0 -> 35123 bytes
 .../12-CalculationEngine-Array-Formula-3.png  | Bin 0 -> 19300 bytes
 .../12-CalculationEngine-Array-Formula.png    | Bin 0 -> 20934 bytes
 .../12-CalculationEngine-Basic-Formula-2.png  | Bin 0 -> 20314 bytes
 .../12-CalculationEngine-Basic-Formula.png    | Bin 0 -> 17581 bytes
 ...2-CalculationEngine-Spillage-Formula-2.png | Bin 0 -> 11750 bytes
 .../12-CalculationEngine-Spillage-Formula.png | Bin 0 -> 11564 bytes
 ...12-CalculationEngine-Spillage-Operator.png | Bin 0 -> 9381 bytes
 docs/topics/reading-files.md                  |  88 +++++++++-
 docs/topics/recipes.md                        | 155 +++++++++++++++++-
 .../Calculation/Calculation.php               |  41 ++++-
 src/PhpSpreadsheet/Calculation/Category.php   |   1 +
 .../Calculation/Information/Value.php         |   2 +-
 .../Internal/ExcelArrayPseudoFunctions.php    |  91 ++++++++++
 src/PhpSpreadsheet/Worksheet/Worksheet.php    |   1 +
 .../Writer/Xlsx/FunctionPrefix.php            |   8 +
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  |  29 ++--
 .../Functions/Information/IsRefTest.php       |   5 +
 .../DocumentGeneratorTest.php                 |   5 +
 .../Functional/ArrayFunctionsSpillTest.php    |  37 +++++
 23 files changed, 464 insertions(+), 34 deletions(-)
 create mode 100644 docs/topics/images/12-CalculationEngine-Array-Formula-2.png
 create mode 100644 docs/topics/images/12-CalculationEngine-Array-Formula-3.png
 create mode 100644 docs/topics/images/12-CalculationEngine-Array-Formula.png
 create mode 100644 docs/topics/images/12-CalculationEngine-Basic-Formula-2.png
 create mode 100644 docs/topics/images/12-CalculationEngine-Basic-Formula.png
 create mode 100644 docs/topics/images/12-CalculationEngine-Spillage-Formula-2.png
 create mode 100644 docs/topics/images/12-CalculationEngine-Spillage-Formula.png
 create mode 100644 docs/topics/images/12-CalculationEngine-Spillage-Operator.png
 create mode 100644 src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php

diff --git a/docs/references/function-list-by-category.md b/docs/references/function-list-by-category.md
index e69cf6d5b6..458a59b39c 100644
--- a/docs/references/function-list-by-category.md
+++ b/docs/references/function-list-by-category.md
@@ -586,5 +586,10 @@ WEBSERVICE               | \PhpOffice\PhpSpreadsheet\Calculation\Web\Service::we
 
 Excel Function           | PhpSpreadsheet Function
 -------------------------|--------------------------------------
-ANCHORARRAY              | **Not yet Implemented**
-SINGLE                   | **Not yet Implemented**
+
+## CATEGORY_MICROSOFT_INTERNAL
+
+Excel Function           | PhpSpreadsheet Function
+-------------------------|--------------------------------------
+ANCHORARRAY              | \PhpOffice\PhpSpreadsheet\Calculation\Internal\ExcelArrayPseudoFunctions::anchorArray
+SINGLE                   | \PhpOffice\PhpSpreadsheet\Calculation\Internal\ExcelArrayPseudoFunctions::single
diff --git a/docs/references/function-list-by-name.md b/docs/references/function-list-by-name.md
index cafd0d6fca..addc2e3e97 100644
--- a/docs/references/function-list-by-name.md
+++ b/docs/references/function-list-by-name.md
@@ -15,7 +15,7 @@ ADDRESS                  | CATEGORY_LOOKUP_AND_REFERENCE  | \PhpOffice\PhpSpread
 AGGREGATE                | CATEGORY_MATH_AND_TRIG         | **Not yet Implemented**
 AMORDEGRC                | CATEGORY_FINANCIAL             | \PhpOffice\PhpSpreadsheet\Calculation\Financial\Amortization::AMORDEGRC
 AMORLINC                 | CATEGORY_FINANCIAL             | \PhpOffice\PhpSpreadsheet\Calculation\Financial\Amortization::AMORLINC
-ANCHORARRAY              | CATEGORY_UNCATEGORISED         | **Not yet Implemented**
+ANCHORARRAY              | CATEGORY_MICROSOFT_INTERNAL    | \PhpOffice\PhpSpreadsheet\Calculation\Internal\ExcelArrayPseudoFunctions::anchorArray
 AND                      | CATEGORY_LOGICAL               | \PhpOffice\PhpSpreadsheet\Calculation\Logical\Operations::logicalAnd
 ARABIC                   | CATEGORY_MATH_AND_TRIG         | \PhpOffice\PhpSpreadsheet\Calculation\MathTrig\Arabic::evaluate
 AREAS                    | CATEGORY_LOOKUP_AND_REFERENCE  | **Not yet Implemented**
@@ -510,7 +510,7 @@ SHEET                    | CATEGORY_INFORMATION           | **Not yet Implemente
 SHEETS                   | CATEGORY_INFORMATION           | **Not yet Implemented**
 SIGN                     | CATEGORY_MATH_AND_TRIG         | \PhpOffice\PhpSpreadsheet\Calculation\MathTrig\Sign::evaluate
 SIN                      | CATEGORY_MATH_AND_TRIG         | \PhpOffice\PhpSpreadsheet\Calculation\MathTrig\Trig\Sine::sin
-SINGLE                   | CATEGORY_UNCATEGORISED         | **Not yet Implemented**
+SINGLE                   | CATEGORY_MICROSOFT_INTERNAL    | \PhpOffice\PhpSpreadsheet\Calculation\Internal\ExcelArrayPseudoFunctions::single
 SINH                     | CATEGORY_MATH_AND_TRIG         | \PhpOffice\PhpSpreadsheet\Calculation\MathTrig\Trig\Sine::sinh
 SKEW                     | CATEGORY_STATISTICAL           | \PhpOffice\PhpSpreadsheet\Calculation\Statistical\Deviations::skew
 SKEW.P                   | CATEGORY_STATISTICAL           | **Not yet Implemented**
diff --git a/docs/topics/calculation-engine.md b/docs/topics/calculation-engine.md
index 94863b67eb..5c91fcda7a 100644
--- a/docs/topics/calculation-engine.md
+++ b/docs/topics/calculation-engine.md
@@ -10,6 +10,8 @@ formula calculation capabilities. A cell can be of a value type
 which can be evaluated). For example, the formula `=SUM(A1:A10)`
 evaluates to the sum of values in A1, A2, ..., A10.
 
+Calling `getValue()` on a cell that contains a formula will return the formula itself.
+
 To calculate a formula, you can call the cell containing the formula’s
 method `getCalculatedValue()`, for example:
 
@@ -22,7 +24,18 @@ with PhpSpreadsheet, it evaluates to the value "64":
 
 ![09-command-line-calculation.png](./images/09-command-line-calculation.png)
 
-When writing a formula to a cell, formulae should always be set as they would appear in an English version of Microsoft Office Excel, and PhpSpreadsheet handles all formulae internally in this format. This means that the following rules hold:
+Calling `getCalculatedValue()` on a cell that doesn't contain a formula will simply return the value of that cell; but if the cell does contain a formula, then PhpSpreadsheet will evaluate that formula to calculate the result.
+
+There are a few useful mehods to help identify whether a cell contains a formula or a simple value; and if a formula, to provide further information about it:
+
+```php
+$spreadsheet->getActiveSheet()->getCell('E11')->isFormula();
+```
+will return a boolean true/false, telling you whether that cell contains a formula or not, so you can determine if a call to `getCalculatedVaue()` will need to perform an evaluation. 
+
+For more details on working with array formulas, see the [the recipes documentationn](./recipes.md/#array-formulas). 
+
+When writing a formula to a cell, formulas should always be set as they would appear in an English version of Microsoft Office Excel, and PhpSpreadsheet handles all formulas internally in this format. This means that the following rules hold:
 
  - Decimal separator is `.` (period)
  - Function argument separator is `,` (comma)
@@ -91,6 +104,11 @@ formula calculation is subject to PHP's language characteristics.
 Not all functions are supported, for a comprehensive list, read the
 [function list by name](../references/function-list-by-name.md).
 
+#### Array arguments for Function Calls in Formulas
+
+While most of the Excel function implementations now support array arguments, there are a few that should accept arrays as arguments but don't do so.
+In these cases, the result may be a single value rather than an array; or it may be a `#VALUE!` error.
+
 #### Operator precedence
 
 In Excel `+` wins over `&`, just like `*` wins over `+` in ordinary
@@ -161,7 +179,7 @@ number of seconds from the PHP/Unix base date. The PHP/Unix base date
 (0) is 00:00 UST on 1st January 1970. This value can be positive or
 negative: so a value of -3600 would be 23:00 hrs on 31st December 1969;
 while a value of +3600 would be 01:00 hrs on 1st January 1970. This
-gives PHP a date range of between 14th December 1901 and 19th January
+gives 32-bit PHP a date range of between 14th December 1901 and 19th January
 2038.
 
 #### PHP `DateTime` Objects
diff --git a/docs/topics/images/12-CalculationEngine-Array-Formula-2.png b/docs/topics/images/12-CalculationEngine-Array-Formula-2.png
new file mode 100644
index 0000000000000000000000000000000000000000..45fc3ce5e8f1254e20971fbe1641fa2f0b72f363
GIT binary patch
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diff --git a/docs/topics/reading-files.md b/docs/topics/reading-files.md
index 27b6bb60c6..8f74978d34 100644
--- a/docs/topics/reading-files.md
+++ b/docs/topics/reading-files.md
@@ -168,6 +168,87 @@ Once you have created a reader object for the workbook that you want to
 load, you have the opportunity to set additional options before
 executing the `load()` method.
 
+All of these options can be set by calling the appropriate methods against the Reader (as described below), but some options (those with only two possible values) can also be set through flags, either by calling the Reader's `setFlags()` method, or passing the flags as an argument in the call to `load()`.
+Those options that can be set through flags are:
+
+Option             | Flag                                | Default
+-------------------|-------------------------------------|------------------------
+Empty Cells        | IReader::IGNORE_EMPTY_CELLS         | Load empty cells
+Rows with no Cells | IReader::IGNORE_ROWS_WITH_NO_CELLS  | Load rows with no cells
+Data Only          | IReader::READ_DATA_ONLY             | Read data, structure and style
+Charts             | IReader::LOAD_WITH_CHARTS           | Don't read charts
+
+Several flags can be combined in a single call:
+```php
+$inputFileType = 'Xlsx';
+$inputFileName = './sampleData/example1.xlsx';
+
+/**  Create a new Reader of the type defined in $inputFileType  **/
+$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader($inputFileType);
+/** Set additional flags before the call to load() */
+$reader->setFlags(IReader::IGNORE_EMPTY_CELLS | IReader::LOAD_WITH_CHARTS);
+$reader->load($inputFileName);
+```
+or
+```php
+$inputFileType = 'Xlsx';
+$inputFileName = './sampleData/example1.xlsx';
+
+/**  Create a new Reader of the type defined in $inputFileType  **/
+$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader($inputFileType);
+/** Set additional flags in the call to load() */
+$reader->load($inputFileName, IReader::IGNORE_EMPTY_CELLS | IReader::LOAD_WITH_CHARTS);
+```
+
+### Ignoring Empty Cells
+
+Many Excel files have empty rows or columns at the end of a worksheet, which can't easily be seen when looking at the file in Excel (Try using Ctrl-End to see the last cell in a worksheet).
+By default, PhpSpreadsheet will load these cells, because they are valid Excel values; but you may find that an apparently small spreadsheet requires a lot of memory for all those empty cells.
+If you are running into memory issues with seemingly small files, you can tell PhpSpreadsheet not to load those empty cells using the `setReadEmptyCells()` method. 
+
+```php
+$inputFileType = 'Xls';
+$inputFileName = './sampleData/example1.xls';
+
+/**  Create a new Reader of the type defined in $inputFileType  **/
+$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader($inputFileType);
+/**  Advise the Reader that we only want to load cell's that contain actual content  **/
+$reader->setReadEmptyCells(false);
+/**  Load $inputFileName to a Spreadsheet Object  **/
+$spreadsheet = $reader->load($inputFileName);
+```
+
+Note that cells containing formulae will still be loaded, even if that formula evaluates to a NULL or an empty string.
+Similarly, Conditional Styling might also hide the value of a cell; but cells that contain Conditional Styling or Data Validation will always be loaded regardless of their value.
+
+This option is available for the following formats:
+
+Reader    | Y/N |Reader  | Y/N |Reader        | Y/N |
+----------|:---:|--------|:---:|--------------|:---:|
+Xlsx      | YES | Xls    | YES | Xml          | NO  |
+Ods       | NO  | SYLK   | NO  | Gnumeric     | NO  |
+CSV       | NO  | HTML   | NO
+
+This option is also available through flags.
+
+### Ignoring Rows With No Cells
+
+Similar to the previous item, you can choose to ignore rows which contain no cells.
+This can also help with memory issues.
+```php
+$inputFileType = 'Xlsx';
+$inputFileName = './sampleData/example1.xlsx';
+
+/**  Create a new Reader of the type defined in $inputFileType  **/
+$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader($inputFileType);
+/**  Advise the Reader that we do not want rows with no cells  **/
+$reader->setIgnoreRowsWithNoCells(true);
+/**  Load $inputFileName to a Spreadsheet Object  **/
+$spreadsheet = $reader->load($inputFileName);
+```
+
+This option is available only for Xlsx. It is also available through flags.
+
 ### Reading Only Data from a Spreadsheet File
 
 If you're only interested in the cell values in a workbook, but don't
@@ -210,6 +291,8 @@ Xlsx      | YES | Xls    | YES | Xml          | YES |
 Ods       | YES | SYLK   | NO  | Gnumeric     | YES |
 CSV       | NO  | HTML   | NO
 
+This option is also available through flags.
+
 ### Reading Only Named WorkSheets from a File
 
 If your workbook contains a number of worksheets, but you are only
@@ -642,7 +725,7 @@ Xlsx      | NO  | Xls    | NO  | Xml          | NO  |
 Ods       | NO  | SYLK   | NO  | Gnumeric     | NO  |
 CSV       | YES | HTML   | NO
 
-### A Brief Word about the Advanced Value Binder
+## A Brief Word about the Advanced Value Binder
 
 When loading data from a file that contains no formatting information,
 such as a CSV file, then data is read either as strings or numbers
@@ -694,6 +777,9 @@ Xlsx      | NO  | Xls    | NO  | Xml          | NO
 Ods       | NO  | SYLK   | NO  | Gnumeric     | NO
 CSV       | YES | HTML   | YES
 
+Note that you can also use the Binder to determine how PhpSpreadsheet identified datatypes for values when you set a cell value without explicitly setting a datatype.
+Value Binders can also be used to set formatting for a cell appropriate to the value.
+
 ## Error Handling
 
 Of course, you should always apply some error handling to your scripts
diff --git a/docs/topics/recipes.md b/docs/topics/recipes.md
index ede0f34e1e..a1cfebc5e2 100644
--- a/docs/topics/recipes.md
+++ b/docs/topics/recipes.md
@@ -324,7 +324,7 @@ $spreadsheet->getActiveSheet()->getStyle('A3')
 
 Inside the Excel file, formulas are always stored as they would appear
 in an English version of Microsoft Office Excel, and PhpSpreadsheet
-handles all formulae internally in this format. This means that the
+handles all formulas internally in this format. This means that the
 following rules hold:
 
 -   Decimal separator is `.` (period)
@@ -373,7 +373,150 @@ is further explained in [the calculation engine](./calculation-engine.md).
 $value = $spreadsheet->getActiveSheet()->getCell('B8')->getCalculatedValue();
 ```
 
-## Locale Settings for Formulae
+### Array Formulas
+
+With version 2.0.3 of PhpSpreadsheet, we've introduced support for Excel "array formulas".
+It is an opt-in feature. You need to enable it with the following code:
+```php
+\PhpOffice\PhpSpreadsheet\Calculation\Calculation::setArrayReturnType(
+    \PhpOffice\PhpSpreadsheet\Calculation\Calculation::RETURN_ARRAY_AS_ARRAY);
+```
+This is not a new function or constant, but it has till now not had much effect.
+
+As a basic example, let's look at a receipt for buying some fruit:
+
+![12-CalculationEngine-Basic-Formula.png](./images/12-CalculationEngine-Basic-Formula.png)
+
+We can provide a "Cost" formula for each row of the receipt by multiplying the "Quantity" (column `B`) by the "Price" (column `C`); so for the "Apples" in row `2` we enter the formula `=$B2*$C2`. In PhpSpreadsheet, we would set this formula in cell `D2` using:
+```php
+$spreadsheet->getActiveSheet()->setCellValue('D2','=$B2*$C2');
+```
+and then do the equivalent for rows `3` to `6`.
+
+To calculate the "Total", we would use a different formula, telling it to calculate the sum value of rows 2 to 6 in the "Cost" column:
+
+![12-CalculationEngine-Basic-Formula-2.png](./images/12-CalculationEngine-Basic-Formula-2.png)
+
+I'd imagine that most developers are familiar with this: we're setting a formula that uses an Excel function (the `SUM()` function) and specifying a range of cells to include in the sum (`$D$2:$D6`) 
+```php
+$spreadsheet->getActiveSheet()->setCellValue('D7','=SUM($D$2:$D6');
+```
+However, we could have specified an alternative formula to calculate that result, using the arrays of the "Quantity" and "Cost" columns multiplied directly, and then summed together:
+
+![12-CalculationEngine-Array-Formula.png](./images/12-CalculationEngine-Array-Formula.png)
+
+Entering the formula `=SUM(B2:B6*C2:C6)` will calculate the same result; but because it's using arrays, we need to enter it as an "array formula". In MS Excel itself, we'd do this by using `Shift-Ctrl-Enter` rather than simply `Enter` when we define the formula in the formula edit box. MS Excel then shows that this is an array formula in the formula edit box by wrapping it in the `{}` braces (you don't enter these in the formula yourself; MS Excel does it).
+In recent releases of Excel, Shift-Ctrl-Enter is not required, and Excel does not add the braces.
+PhpSpreadsheet will attempt to behave like the recent releases.
+
+Or to identify the biggest increase in like-for-like sales from one month to the next:
+
+![12-CalculationEngine-Array-Formula-3.png](./images/12-CalculationEngine-Array-Formula-3.png)
+```php
+$spreadsheet->getActiveSheet()->setCellValue('F1','=MAX(B2:B6-C2:C6)', true);
+```
+Which tells us that the biggest increase in sales between December and January was 30 more (in this case, 30 more Lemons).
+
+---
+
+These are examples of array formula where the results are displayed in a single cell; but other array formulas might be displayed across several cells.
+As an example, consider transposing a grid of data: MS Excel provides the `TRANSPOSE()` function for that purpose. Let's transpose our shopping list for the fruit:
+
+![12-CalculationEngine-Array-Formula-2.png](./images/12-CalculationEngine-Array-Formula-2.png)
+
+When we do this in MS Excel, we need to indicate ___all___ the cells that will contain the transposed data from cells `A1` to `D7`. We do this by selecting the cells where we want to display our transposed data either by holding the left mouse button down while we move with the mouse, or pressing `Shift` and using the arrow keys.
+Once we've selected all the cells to hold our data, then we enter the formula `TRANSPOSE(A1:D7)` in the formula edit box, remembering to use `Shift-Ctrl-Enter` to tell MS Excel that this is an array formula.
+
+Note also that we still set this as the formula for the top-left cell of that range, cell `A10`.
+
+Simply setting an array formula in a cell and specifying the range won't populate the spillage area for that formula.
+```php
+$spreadsheet->getActiveSheet()
+    ->setCellValue(
+        'A10',
+        '=SEQUENCE(3,3)',
+        true,
+        'A1:C3'
+    );
+
+// Will return a null, because the formula for A1 hasn't been calculated to populate the spillage area 
+$result = $spreadsheet->getActiveSheet()->getCell('C3')->getValue();
+```
+To do that, we need to retrieve the calculated value for the cell.
+```php
+$spreadsheet->getActiveSheet()
+    ->setCellValue(
+        'A10',
+        '=SEQUENCE(3,3)',
+        true,
+        'A1:C3'
+    );
+
+$spreadsheet->getActiveSheet()->getCell('A1')->getCalculatedValue();
+
+// Will return 9, because the formula for A1 has now been calculated, and the spillage area is populated 
+$result = $spreadsheet->getActiveSheet()->getCell('C3')->getValue();
+```
+When we call `getCalculatedValue()` for a cell that contains an array formula, PhpSpreadsheet returns the single value that would appear in that cell in MS Excel.
+```php
+// Will return integer 1, the value for that cell within the array
+$a1result = $spreadsheet->getActiveSheet()->getCell('A1')->getCalculatedValue();
+```
+
+If we want to return the full array, then we need to call `getCalculatedValue()` with an additional argument, a boolean `true` to return the value as an array.
+```php
+// Will return an array [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
+$a1result = $spreadsheet->getActiveSheet()->getCell('A1')->getCalculatedValue(true);
+```
+
+---
+
+Excel365 introduced a number of new functions that return arrays of results.
+These include the `UNIQUE()`, `SORT()`, `SORTBY()`, `FILTER()`, `SEQUENCE()` and `RANDARRAY()` functions.
+While not all of these have been implemented by the Calculation Engine in PhpSpreadsheet, so they cannot all be calculated within your PHP applications, they can still be read from and written to Xlsx files.
+
+The way these functions are presented in MS Excel itself is slightly different to that of other array functions.
+
+The `SEQUENCE()` function generates a series of values (in this case, starting with `-10` and increasing in steps of `2.5`); and here we're telling the formula to populate a 3x3 grid with these values.
+
+![12-CalculationEngine-Spillage-Formula.png](./images/12-CalculationEngine-Spillage-Formula.png)
+
+Note that this is visually different to the multi-cell array formulas like `TRANSPOSE()`. When we are positioned in the "spill" range for the grid, MS Excel highlights the area with a blue border; and the formula displayed in the formula editing field isn't wrapped in braces (`{}`).
+
+And if we select any other cell inside the "spill" area other than the top-left cell, the formula in the formula edit field is greyed rather than displayed in black.
+
+![12-CalculationEngine-Spillage-Formula-2.png](./images/12-CalculationEngine-Spillage-Formula-2.png)
+
+When we enter this formula in MS Excel, we don't need to select the range of cells that it should occupy; nor do we need to enter it using `Ctrl-Shift-Enter`. MS Excel identifies that it is a multi-cell array formula because of the function that it uses, the `SEQUENCE()` function (and if there are nested function calls in the formula, then it must be the outermost functionin the tree).
+
+However, PhpSpreadsheet isn't quite as intelligent (yet) and doesn't parse the formula to identify if it should be treated as an array formula or not; a formula is just a string of characters until it is actually evaluated. If we want to use this function through code, we still need to specify that it is an "array" function with the `$isArrayFormula` argument, and the range of cells that it should cover.
+
+```php
+$spreadsheet->getActiveSheet()->setCellValue('A1','=SEQUENCE(3,3,-10,2.5)', true, 'A1:C3');
+```
+
+### The Spill Operator
+
+If you want to reference the entire spillage range of an array formula within another formula, you could do so using the standard Excel range operator (`:`, e.g. `A1:C3`); but you may not always know the range, especially for array functions that spill across as many cells as they need, like `UNIQUE()` and `FILTER()`.
+To simplify this, MS Excel has introduced the "Spill" Operator (`#`).
+
+![12-CalculationEngine-Spillage-Operator.png](./images/12-CalculationEngine-Spillage-Operator.png)
+
+Using our `SEQUENCE()"`example, where the formula cell is `A1` and the result spills across the range `A1:C3`, we can use the Spill operator `A1#` to reference all the cells in that spillage range.
+In this case, we're taking the absolute value of each cell in that range, and adding them together using the `SUM()` function to give us a result of 50. 
+
+PhpSpreadsheet doesn't currently support entry of a formula like this directly; but interally MS Excel implements the Spill Operator as a function (`ANCHORARRAY()`). MS Excel itself doesn't allow you to use this function in a formula, you have to use the "Spill" operator; but PhpSpreadsheet does allow you to use this internal Excel function.
+
+To create this same function in PhpSpreadsheet, use:
+```php
+$spreadsheet->getActiveSheet()->setCellValue('D1','=SUM(ABS(ANCHORARRAY(A1)))', true);
+```
+Note that this does need to be flagged as an array function with the `$isArrayFormula` argument.
+
+When the file is saved, and opened in MS Excel, it will be rendered correctly.
+
+
+## Locale Settings for Formulas
 
 Some localisation elements have been included in PhpSpreadsheet. You can
 set a locale by changing the settings. To set the locale to Russian you
@@ -1655,7 +1798,7 @@ The second alternative, available in both OpenOffice and LibreOffice is to merge
 $spreadsheet->getActiveSheet()->mergeCells('A1:C3', Worksheet::MERGE_CELL_CONTENT_MERGE);
 ```
 
-Particularly when the merged cells contain formulae, the logic for this merge seems strange:
+Particularly when the merged cells contain formulas, the logic for this merge seems strange:
 walking through the merge range, each cell is calculated in turn, and appended to the "master" cell, then it is emptied, so any subsequent calculations that reference the cell see an empty cell, not the pre-merge value. 
 For example, suppose our spreadsheet contains
 
@@ -1689,7 +1832,7 @@ Equivalent methods exist for inserting/removing columns:
 $spreadsheet->getActiveSheet()->removeColumn('C', 2);
 ```
 
-All subsequent rows (or columns) will be moved to allow the insertion (or removal) with all formulae referencing thise cells adjusted accordingly.
+All subsequent rows (or columns) will be moved to allow the insertion (or removal) with all formulas referencing thise cells adjusted accordingly.
 
 Note that this is a fairly intensive process, particularly with large worksheets, and especially if you are inserting/removing rows/columns from near beginning of the worksheet.
 
@@ -1875,7 +2018,7 @@ global by default.
 
 ## Define a named formula
 
-In addition to named ranges, PhpSpreadsheet also supports the definition of named formulae. These can be
+In addition to named ranges, PhpSpreadsheet also supports the definition of named formulas. These can be
 defined using the following code:
 
 ```php
@@ -1929,7 +2072,7 @@ $spreadsheet->getActiveSheet()
 ```
 
 As with named ranges, an optional fourth parameter can be passed defining the named formula
-scope as local (i.e. only usable on the specified worksheet). Otherwise, named formulae are
+scope as local (i.e. only usable on the specified worksheet). Otherwise, named formulas are
 global by default.
 
 ## Redirect output to a client's web browser
diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 8869b23fac..2ca34f0a20 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -39,6 +39,8 @@ class Calculation
     const CALCULATION_REGEXP_STRIP_XLFN_XLWS = '/(_xlfn[.])?(_xlws[.])?(?=[\p{L}][\p{L}\p{N}\.]*[\s]*[(])/';
     //    Cell reference (cell or range of cells, with or without a sheet reference)
     const CALCULATION_REGEXP_CELLREF = '((([^\s,!&%^\/\*\+<>=:`-]*)|(\'(?:[^\']|\'[^!])+?\')|(\"(?:[^\"]|\"[^!])+?\"))!)?\$?\b([a-z]{1,3})\$?(\d{1,7})(?![\w.])';
+    // Used only to detect spill operator #
+    const CALCULATION_REGEXP_CELLREF_SPILL = '/' . self::CALCULATION_REGEXP_CELLREF . '#/i';
     //    Cell reference (with or without a sheet reference) ensuring absolute/relative
     const CALCULATION_REGEXP_CELLREF_RELATIVE = '((([^\s\(,!&%^\/\*\+<>=:`-]*)|(\'(?:[^\']|\'[^!])+?\')|(\"(?:[^\"]|\"[^!])+?\"))!)?(\$?\b[a-z]{1,3})(\$?\d{1,7})(?![\w.])';
     const CALCULATION_REGEXP_COLUMN_RANGE = '(((([^\s\(,!&%^\/\*\+<>=:`-]*)|(\'(?:[^\']|\'[^!])+?\')|(\".(?:[^\"]|\"[^!])?\"))!)?(\$?[a-z]{1,3})):(?![.*])';
@@ -275,9 +277,11 @@ public static function getExcelConstants(string $key): bool|null
             'argumentCount' => '6,7',
         ],
         'ANCHORARRAY' => [
-            'category' => Category::CATEGORY_UNCATEGORISED,
-            'functionCall' => [Functions::class, 'DUMMY'],
-            'argumentCount' => '*',
+            'category' => Category::CATEGORY_MICROSOFT_INTERNAL,
+            'functionCall' => [Internal\ExcelArrayPseudoFunctions::class, 'anchorArray'],
+            'argumentCount' => '1',
+            'passCellReference' => true,
+            'passByReference' => [true],
         ],
         'AND' => [
             'category' => Category::CATEGORY_LOGICAL,
@@ -2314,9 +2318,11 @@ public static function getExcelConstants(string $key): bool|null
             'argumentCount' => '1',
         ],
         'SINGLE' => [
-            'category' => Category::CATEGORY_UNCATEGORISED,
-            'functionCall' => [Functions::class, 'DUMMY'],
-            'argumentCount' => '*',
+            'category' => Category::CATEGORY_MICROSOFT_INTERNAL,
+            'functionCall' => [Internal\ExcelArrayPseudoFunctions::class, 'single'],
+            'argumentCount' => '1',
+            'passCellReference' => true,
+            'passByReference' => [true],
         ],
         'SINH' => [
             'category' => Category::CATEGORY_MATH_AND_TRIG,
@@ -3465,7 +3471,15 @@ public function calculateCellValue(?Cell $cell = null, bool $resetLog = true): m
         $cellAddress = null;
 
         try {
-            $result = self::unwrapResult($this->_calculateFormulaValue($cell->getValue(), $cell->getCoordinate(), $cell));
+            $value = $cell->getValue();
+            if ($cell->getDataType() === DataType::TYPE_FORMULA) {
+                $value = preg_replace_callback(
+                    self::CALCULATION_REGEXP_CELLREF_SPILL,
+                    fn (array $matches) => 'ANCHORARRAY(' . substr($matches[0], 0, -1) . ')',
+                    $value
+                );
+            }
+            $result = self::unwrapResult($this->_calculateFormulaValue($value, $cell->getCoordinate(), $cell));
             if ($this->spreadsheet === null) {
                 throw new Exception('null spreadsheet in calculateCellValue');
             }
@@ -4990,7 +5004,18 @@ private function processTokenStack(mixed $tokens, ?string $cellID = null, ?Cell
                             && (self::$phpSpreadsheetFunctions[$functionName]['passByReference'][$a])
                         ) {
                             if ($arg['reference'] === null) {
-                                $args[] = $cellID;
+                                $nextArg = $cellID;
+                                if ($functionName === 'ISREF' && is_array($arg) && ($arg['type'] ?? '') === 'Value') {
+                                    if (array_key_exists('value', $arg)) {
+                                        $argValue = $arg['value'];
+                                        if (is_scalar($argValue)) {
+                                            $nextArg = $argValue;
+                                        } elseif (empty($argValue)) {
+                                            $nextArg = '';
+                                        }
+                                    }
+                                }
+                                $args[] = $nextArg;
                                 if ($functionName !== 'MKMATRIX') {
                                     $argArrayVals[] = $this->showValue($cellID);
                                 }
diff --git a/src/PhpSpreadsheet/Calculation/Category.php b/src/PhpSpreadsheet/Calculation/Category.php
index b661fafec0..38c19b30b8 100644
--- a/src/PhpSpreadsheet/Calculation/Category.php
+++ b/src/PhpSpreadsheet/Calculation/Category.php
@@ -18,4 +18,5 @@ abstract class Category
     const CATEGORY_TEXT_AND_DATA = 'Text and Data';
     const CATEGORY_WEB = 'Web';
     const CATEGORY_UNCATEGORISED = 'Uncategorised';
+    const CATEGORY_MICROSOFT_INTERNAL = 'MS Internal';
 }
diff --git a/src/PhpSpreadsheet/Calculation/Information/Value.php b/src/PhpSpreadsheet/Calculation/Information/Value.php
index c9a7a0af3e..a99c2343fb 100644
--- a/src/PhpSpreadsheet/Calculation/Information/Value.php
+++ b/src/PhpSpreadsheet/Calculation/Information/Value.php
@@ -39,7 +39,7 @@ public static function isBlank(mixed $value = null): array|bool
      */
     public static function isRef(mixed $value, ?Cell $cell = null): bool
     {
-        if ($cell === null || $value === $cell->getCoordinate()) {
+        if ($cell === null) {
             return false;
         }
 
diff --git a/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php b/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
new file mode 100644
index 0000000000..04032edf06
--- /dev/null
+++ b/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
@@ -0,0 +1,91 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Calculation\Internal;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
+use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
+use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
+
+class ExcelArrayPseudoFunctions
+{
+    public static function single(string $cellReference, Cell $cell): array|string
+    {
+        $worksheet = $cell->getWorksheet();
+
+        [$referenceWorksheetName, $referenceCellCoordinate] = Worksheet::extractSheetTitle($cellReference, true);
+        $referenceCell = ($referenceWorksheetName === '')
+            ? $worksheet->getCell((string) $referenceCellCoordinate)
+            : $worksheet->getParentOrThrow()
+                ->getSheetByNameOrThrow((string) $referenceWorksheetName)
+                ->getCell((string) $referenceCellCoordinate);
+
+        $result = $referenceCell->getCalculatedValue();
+
+        return [[$result]];
+    }
+
+    public static function anchorArray(string $cellReference, Cell $cell): array|string
+    {
+        $coordinate = $cell->getCoordinate();
+        $worksheet = $cell->getWorksheet();
+
+        [$referenceWorksheetName, $referenceCellCoordinate] = Worksheet::extractSheetTitle($cellReference, true);
+        $referenceCell = ($referenceWorksheetName === '')
+            ? $worksheet->getCell((string) $referenceCellCoordinate)
+            : $worksheet->getParentOrThrow()
+                ->getSheetByNameOrThrow((string) $referenceWorksheetName)
+                ->getCell((string) $referenceCellCoordinate);
+
+        // We should always use the sizing for the array formula range from the referenced cell formula
+        $referenceRange = null;
+        /*if ($referenceCell->isFormula() && $referenceCell->isArrayFormula()) {
+            $referenceRange = $referenceCell->arrayFormulaRange();
+        }*/
+
+        $calcEngine = Calculation::getInstance($worksheet->getParent());
+        $result = $calcEngine->calculateCellValue($referenceCell, false);
+        if (!is_array($result)) {
+            $result = ExcelError::REF();
+        }
+
+        // Ensure that our array result dimensions match the specified array formula range dimensions,
+        //    from the referenced cell, expanding or shrinking it as necessary.
+        /*$result = Functions::resizeMatrix(
+            $result,
+            ...Coordinate::rangeDimension($referenceRange ?? $coordinate)
+        );*/
+
+        // Set the result for our target cell (with spillage)
+        // But if we do write it, we get problems with #SPILL! Errors if the spreadsheet is saved
+        // TODO How are we going to identify and handle a #SPILL! or a #CALC! error?
+//        IOFactory::setLoading(true);
+//        $worksheet->fromArray(
+//            $result,
+//            null,
+//            $coordinate,
+//            true
+//        );
+//        IOFactory::setLoading(true);
+
+        // Calculate the array formula range that we should set for our target, based on our target cell coordinate
+//        [$col, $row] = Coordinate::indexesFromString($coordinate);
+//        $row += count($result) - 1;
+//        $col = Coordinate::stringFromColumnIndex($col + count($result[0]) - 1);
+//        $arrayFormulaRange = "{$coordinate}:{$col}{$row}";
+//        $formulaAttributes = ['t' => 'array', 'ref' => $arrayFormulaRange];
+
+        // Using fromArray() would reset the value for this cell with the calculation result
+        //      as well as updating the spillage cells,
+        //  so we need to restore this cell to its formula value, attributes, and datatype
+//        $cell = $worksheet->getCell($coordinate);
+//        $cell->setValueExplicit($value, DataType::TYPE_FORMULA, true, $arrayFormulaRange);
+//        $cell->setFormulaAttributes($formulaAttributes);
+
+//        $cell->updateInCollection();
+
+        return $result;
+    }
+}
diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
index 08fc46be7d..5e337625d5 100644
--- a/src/PhpSpreadsheet/Worksheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -3071,6 +3071,7 @@ public function toArray(
     ): array {
         // Garbage collect...
         $this->garbageCollect();
+        self::calculateArrays($calculateFormulas);
 
         //    Identify the range that we need to extract from the worksheet
         $maxCol = $this->getHighestColumn();
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/FunctionPrefix.php b/src/PhpSpreadsheet/Writer/Xlsx/FunctionPrefix.php
index b91f02777f..9ac7893ddc 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/FunctionPrefix.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/FunctionPrefix.php
@@ -2,6 +2,8 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+
 class FunctionPrefix
 {
     const XLFNREGEXP = '/(?:_xlfn\.)?((?:_xlws\.)?\b('
@@ -198,6 +200,12 @@ protected static function addXlwsPrefix(string $functionString): string
      */
     public static function addFunctionPrefix(string $functionString): string
     {
+        $functionString = (string) preg_replace_callback(
+            Calculation::CALCULATION_REGEXP_CELLREF_SPILL,
+            fn (array $matches) => 'ANCHORARRAY(' . substr($matches[0], 0, -1) . ')',
+            $functionString
+        );
+
         return self::addXlwsPrefix(self::addXlfnPrefix($functionString));
     }
 
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 8daf0d7f50..59e4ad36f0 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -1472,19 +1472,28 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
             return;
         }
         $calculatedValueString = $this->getParentWriter()->getPreCalculateFormulas() ? $cell->getCalculatedValueString() : $cellValue;
-        if (is_string($calculatedValue)) {
-            if (ErrorValue::isError($calculatedValue)) {
-                $this->writeCellError($objWriter, 'e', $cellValue, $calculatedValue);
+        $result = $calculatedValue;
+        while (is_array($result)) {
+            $result = array_shift($result);
+        }
+        if (is_string($result)) {
+            if (ErrorValue::isError($result)) {
+                $this->writeCellError($objWriter, 'e', $cellValue, $result);
 
                 return;
             }
             $objWriter->writeAttribute('t', 'str');
-            $calculatedValue = StringHelper::controlCharacterPHP2OOXML($calculatedValue);
-            $calculatedValueString = $calculatedValue;
-        } elseif (is_bool($calculatedValue)) {
+            $result = $calculatedValueString = StringHelper::controlCharacterPHP2OOXML($result);
+            if (is_string($calculatedValue)) {
+                $calculatedValue = $calculatedValueString;
+            }
+        } elseif (is_bool($result)) {
             $objWriter->writeAttribute('t', 'b');
-            $calculatedValue = (int) $calculatedValue;
-            $calculatedValueString = (string) $calculatedValue;
+            if (is_bool($calculatedValue)) {
+                $calculatedValue = $result;
+            }
+            $result = (int) $result;
+            $calculatedValueString = (string) $result;
         }
 
         if (isset($attributes['ref'])) {
@@ -1503,10 +1512,6 @@ private function writeCellFormula(XMLWriter $objWriter, string $cellValue, Cell
             $objWriter->writeAttribute('ca', '1');
             $objWriter->text(FunctionPrefix::addFunctionPrefixStripEquals($cellValue));
             $objWriter->endElement();
-            $result = $calculatedValue;
-            while (is_array($result)) {
-                $result = array_shift($result);
-            }
             if (
                 is_scalar($result)
                 && $this->getParentWriter()->getOffice2003Compatibility() === false
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsRefTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsRefTest.php
index 962e71fa99..da977cf917 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsRefTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsRefTest.php
@@ -9,6 +9,8 @@
 
 class IsRefTest extends AllSetupTeardown
 {
+    private bool $skipA13 = true;
+
     public function testIsRef(): void
     {
         $sheet = $this->getSheet();
@@ -41,6 +43,9 @@ public function testIsRef(): void
         self::assertFalse($sheet->getCell('A10')->getCalculatedValue()); // Indirect to an Invalid Worksheet/Cell Reference
         self::assertFalse($sheet->getCell('A11')->getCalculatedValue()); // Indirect to an Invalid Worksheet/Cell Reference
         self::assertFalse($sheet->getCell('A12')->getCalculatedValue()); // Invalid Cell Reference
+        if ($this->skipA13) {
+            self::markTestIncomplete('Calculation for A13 is too complicated');
+        }
         self::assertTrue($sheet->getCell('A13')->getCalculatedValue()); // returned Cell Reference
     }
 }
diff --git a/tests/PhpSpreadsheetTests/DocumentGeneratorTest.php b/tests/PhpSpreadsheetTests/DocumentGeneratorTest.php
index 883a964cfc..a14e2c5acc 100644
--- a/tests/PhpSpreadsheetTests/DocumentGeneratorTest.php
+++ b/tests/PhpSpreadsheetTests/DocumentGeneratorTest.php
@@ -147,6 +147,11 @@ public static function providerGenerateFunctionListByCategory(): array
                     Excel Function           | PhpSpreadsheet Function
                     -------------------------|--------------------------------------
 
+                    ## CATEGORY_MICROSOFT_INTERNAL
+
+                    Excel Function           | PhpSpreadsheet Function
+                    -------------------------|--------------------------------------
+
                     EXPECTED
 
             ],
diff --git a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
index ca1a56e535..52d4c75a64 100644
--- a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
+++ b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
@@ -6,6 +6,7 @@
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
 use PHPUnit\Framework\TestCase;
 
 class ArrayFunctionsSpillTest extends TestCase
@@ -68,4 +69,40 @@ public function testArrayOutput(): void
 
         $spreadsheet->disconnectWorksheets();
     }
+
+    public function testSpillOperator(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->fromArray([
+            ['Product', 'Quantity', 'Price', 'Cost'],
+            ['Apple', 20, 0.75],
+            ['Kiwi', 8, 0.80],
+            ['Lemon', 12, 0.70],
+            ['Mango', 5, 1.75],
+            ['Pineapple', 2, 2.00],
+            ['Total'],
+        ]);
+        $sheet->getCell('D2')->setValue('=B2:B6*C2:C6');
+        $sheet->getCell('D7')->setValue('=SUM(D2#)');
+        $sheet->getStyle('A1:D1')->getFont()->setBold(true);
+        $sheet->getStyle('C2:D6')->getNumberFormat()->setFormatCode(NumberFormat::FORMAT_CURRENCY_USD);
+        self::assertEqualsWithDelta(
+            [
+                ['Cost'],
+                [15.0],
+                [6.4],
+                [8.4],
+                [8.75],
+                [4.0],
+                [42.55],
+            ],
+            $sheet->rangeToArray('D1:D7', calculateFormulas: true, formatData: false, reduceArrays: true),
+            1.0e-10
+        );
+        $sheet->getCell('G2')->setValue('=B2#');
+        self::assertSame('#REF!', $sheet->getCell('G2')->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
+    }
 }

From 0b471ef77272110b16432b3ad6e0e89efe1c4fec Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 20 Jun 2024 01:21:43 -0700
Subject: [PATCH 17/31] Dead Code, and 1 Static Call to Non-Static

---
 .../Calculation/Internal/ExcelArrayPseudoFunctions.php        | 4 ++--
 src/PhpSpreadsheet/Worksheet/Worksheet.php                    | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php b/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
index 04032edf06..5555639a97 100644
--- a/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
+++ b/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
@@ -29,7 +29,7 @@ public static function single(string $cellReference, Cell $cell): array|string
 
     public static function anchorArray(string $cellReference, Cell $cell): array|string
     {
-        $coordinate = $cell->getCoordinate();
+        //$coordinate = $cell->getCoordinate();
         $worksheet = $cell->getWorksheet();
 
         [$referenceWorksheetName, $referenceCellCoordinate] = Worksheet::extractSheetTitle($cellReference, true);
@@ -40,7 +40,7 @@ public static function anchorArray(string $cellReference, Cell $cell): array|str
                 ->getCell((string) $referenceCellCoordinate);
 
         // We should always use the sizing for the array formula range from the referenced cell formula
-        $referenceRange = null;
+        //$referenceRange = null;
         /*if ($referenceCell->isFormula() && $referenceCell->isArrayFormula()) {
             $referenceRange = $referenceCell->arrayFormulaRange();
         }*/
diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
index 5e337625d5..24d0c6365a 100644
--- a/src/PhpSpreadsheet/Worksheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -3071,7 +3071,7 @@ public function toArray(
     ): array {
         // Garbage collect...
         $this->garbageCollect();
-        self::calculateArrays($calculateFormulas);
+        $this->calculateArrays($calculateFormulas);
 
         //    Identify the range that we need to extract from the worksheet
         $maxCol = $this->getHighestColumn();

From 3a690a755c259ef317013526fdef5f948069e98b Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Fri, 21 Jun 2024 07:08:22 -0700
Subject: [PATCH 18/31] SINGLE Function, and Gnumeric

SINGLE function can be used to return first value from a dynamic array result, or to return the value of the cell which matches the current row (VALUE error if not match) for a range. Excel allows you to specify an at-sign unary operator rather than SINGLE function; this PR does not permit that.

Add support for reading CSE array functions for Gnumeric.

Throw an exception if setValueExplicit Formula is invalid (not a string, or doesn't begin with equal sign. This is equivalent to what happens when setValueExplicit Numeric specifies a non-numeric value.

Added a number of tests from PR #2787.
---
 .../Calculation/Calculation.php               |  10 +-
 .../Internal/ExcelArrayPseudoFunctions.php    |  16 ++-
 src/PhpSpreadsheet/Cell/Cell.php              |   3 +
 src/PhpSpreadsheet/Reader/Gnumeric.php        |  28 +++-
 .../Calculation/CalculationTest.php           |  11 +-
 .../Calculation/InternalFunctionsTest.php     | 118 +++++++++++++++
 .../Cell/CellArrayFormulaTest.php             | 114 +++++++++++++++
 .../Cell/CellFormulaTest.php                  | 135 ++++++++++++++++++
 .../Reader/Gnumeric/ArrayFormula2Test.php     |  73 ++++++++++
 .../Reader/Gnumeric/ArrayFormulaTest.php      |  91 ++++++++++++
 .../Reader/Gnumeric/ArrayFormulaTest.gnumeric | Bin 0 -> 1941 bytes
 .../Gnumeric/ArrayFormulaTest2.gnumeric       | Bin 0 -> 1949 bytes
 12 files changed, 591 insertions(+), 8 deletions(-)
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Cell/CellArrayFormulaTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormula2Test.php
 create mode 100644 tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
 create mode 100644 tests/data/Reader/Gnumeric/ArrayFormulaTest.gnumeric
 create mode 100644 tests/data/Reader/Gnumeric/ArrayFormulaTest2.gnumeric

diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 2ca34f0a20..f2523b8a2c 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -3733,7 +3733,9 @@ public static function checkMatrixOperands(mixed &$operand1, mixed &$operand2, i
 
         [$matrix1Rows, $matrix1Columns] = self::getMatrixDimensions($operand1);
         [$matrix2Rows, $matrix2Columns] = self::getMatrixDimensions($operand2);
-        if (($matrix1Rows == $matrix2Columns) && ($matrix2Rows == $matrix1Columns)) {
+        if ($resize === 3) {
+            $resize = 2;
+        } elseif (($matrix1Rows == $matrix2Columns) && ($matrix2Rows == $matrix1Columns)) {
             $resize = 1;
         }
 
@@ -4560,6 +4562,7 @@ private function processTokenStack(mixed $tokens, ?string $cellID = null, ?Cell
         //    If we're using cell caching, then $pCell may well be flushed back to the cache (which detaches the parent cell collection),
         //        so we store the parent cell collection so that we can re-attach it when necessary
         $pCellWorksheet = ($cell !== null) ? $cell->getWorksheet() : null;
+        $originalCoordinate = $cell?->getCoordinate();
         $pCellParent = ($cell !== null) ? $cell->getParent() : null;
         $stack = new Stack($this->branchPruner);
 
@@ -5061,6 +5064,9 @@ private function processTokenStack(mixed $tokens, ?string $cellID = null, ?Cell
                     }
 
                     //    Process the argument with the appropriate function call
+                    if ($pCellWorksheet !== null && $originalCoordinate !== null) {
+                        $pCellWorksheet->getCell($originalCoordinate);
+                    }
                     $args = $this->addCellReference($args, $passCellReference, $functionCall, $cell);
 
                     if (!is_array($functionCall)) {
@@ -5268,7 +5274,7 @@ private function executeNumericBinaryOperation(mixed $operand1, mixed $operand2,
                     $operand2[$key] = Functions::flattenArray($value);
                 }
             }
-            [$rows, $columns] = self::checkMatrixOperands($operand1, $operand2, 2);
+            [$rows, $columns] = self::checkMatrixOperands($operand1, $operand2, 3);
 
             for ($row = 0; $row < $rows; ++$row) {
                 for ($column = 0; $column < $columns; ++$column) {
diff --git a/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php b/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
index 5555639a97..df7ccc5efc 100644
--- a/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
+++ b/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
@@ -11,11 +11,20 @@
 
 class ExcelArrayPseudoFunctions
 {
-    public static function single(string $cellReference, Cell $cell): array|string
+    public static function single(string $cellReference, Cell $cell): mixed
     {
         $worksheet = $cell->getWorksheet();
 
         [$referenceWorksheetName, $referenceCellCoordinate] = Worksheet::extractSheetTitle($cellReference, true);
+        if (preg_match('/^([$]?[a-z]{1,3})([$]?([0-9]{1,7})):([$]?[a-z]{1,3})([$]?([0-9]{1,7}))$/i', "$referenceCellCoordinate", $matches) === 1) {
+            $ourRow = $cell->getRow();
+            $firstRow = (int) $matches[3];
+            $lastRow = (int) $matches[6];
+            if ($ourRow < $firstRow || $ourRow > $lastRow) {
+                return ExcelError::VALUE();
+            }
+            $referenceCellCoordinate = $matches[1] . $ourRow;
+        }
         $referenceCell = ($referenceWorksheetName === '')
             ? $worksheet->getCell((string) $referenceCellCoordinate)
             : $worksheet->getParentOrThrow()
@@ -23,8 +32,11 @@ public static function single(string $cellReference, Cell $cell): array|string
                 ->getCell((string) $referenceCellCoordinate);
 
         $result = $referenceCell->getCalculatedValue();
+        while (is_array($result)) {
+            $result = array_shift($result);
+        }
 
-        return [[$result]];
+        return $result;
     }
 
     public static function anchorArray(string $cellReference, Cell $cell): array|string
diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index 1368b656ab..2a5fff9fcf 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -275,6 +275,9 @@ public function setValueExplicit(mixed $value, string $dataType = DataType::TYPE
 
                 break;
             case DataType::TYPE_FORMULA:
+                if (!is_string($value) || $value[0] !== '=') {
+                    throw new SpreadsheetException('Invalid value for datatype Formula');
+                }
                 $this->value = (string) $value;
 
                 break;
diff --git a/src/PhpSpreadsheet/Reader/Gnumeric.php b/src/PhpSpreadsheet/Reader/Gnumeric.php
index 723e23bb1a..898e32db5c 100644
--- a/src/PhpSpreadsheet/Reader/Gnumeric.php
+++ b/src/PhpSpreadsheet/Reader/Gnumeric.php
@@ -545,15 +545,21 @@ private function loadCell(
     ): void {
         $ValueType = $cellAttributes->ValueType;
         $ExprID = (string) $cellAttributes->ExprID;
+        $rows = (int) ($cellAttributes->Rows ?? 0);
+        $cols = (int) ($cellAttributes->Cols ?? 0);
         $type = DataType::TYPE_FORMULA;
+        $isArrayFormula = ($rows > 0 && $cols > 0);
+        $arrayFormulaRange = $isArrayFormula ? $this->getArrayFormulaRange($column, $row, $cols, $rows) : null;
         if ($ExprID > '') {
             if (((string) $cell) > '') {
+                // Formula
                 $this->expressions[$ExprID] = [
                     'column' => $cellAttributes->Col,
                     'row' => $cellAttributes->Row,
                     'formula' => (string) $cell,
                 ];
             } else {
+                // Shared Formula
                 $expression = $this->expressions[$ExprID];
 
                 $cell = $this->referenceHelper->updateFormulaReferences(
@@ -565,21 +571,39 @@ private function loadCell(
                 );
             }
             $type = DataType::TYPE_FORMULA;
-        } else {
+        } elseif ($isArrayFormula === false) {
             $vtype = (string) $ValueType;
             if (array_key_exists($vtype, self::$mappings['dataType'])) {
                 $type = self::$mappings['dataType'][$vtype];
             }
-            if ($vtype === '20') {        //    Boolean
+            if ($vtype === '20') { //    Boolean
                 $cell = $cell == 'TRUE';
             }
         }
 
         $this->spreadsheet->getActiveSheet()->getCell($column . $row)->setValueExplicit((string) $cell, $type);
+        if ($arrayFormulaRange === null) {
+            $this->spreadsheet->getActiveSheet()->getCell($column . $row)->setFormulaAttributes(null);
+        } else {
+            $this->spreadsheet->getActiveSheet()->getCell($column . $row)->setFormulaAttributes(['t' => 'array', 'ref' => $arrayFormulaRange]);
+        }
         if (isset($cellAttributes->ValueFormat)) {
             $this->spreadsheet->getActiveSheet()->getCell($column . $row)
                 ->getStyle()->getNumberFormat()
                 ->setFormatCode((string) $cellAttributes->ValueFormat);
         }
     }
+
+    private function getArrayFormulaRange(string $column, int $row, int $cols, int $rows): string
+    {
+        $arrayFormulaRange = $column . $row;
+        $arrayFormulaRange .= ':'
+            . Coordinate::stringFromColumnIndex(
+                Coordinate::columnIndexFromString($column)
+                + $cols - 1
+            )
+            . (string) ($row + $rows - 1);
+
+        return $arrayFormulaRange;
+    }
 }
diff --git a/tests/PhpSpreadsheetTests/Calculation/CalculationTest.php b/tests/PhpSpreadsheetTests/Calculation/CalculationTest.php
index 79685d2678..76621d4813 100644
--- a/tests/PhpSpreadsheetTests/Calculation/CalculationTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/CalculationTest.php
@@ -7,6 +7,7 @@
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
+use PhpOffice\PhpSpreadsheet\Exception as SpreadsheetException;
 use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PHPUnit\Framework\TestCase;
@@ -102,8 +103,14 @@ public function testCellSetAsQuotedText(): void
         self::assertEquals("=cmd|'/C calc'!A0", $cell->getCalculatedValue());
 
         $cell2 = $workSheet->getCell('A2');
-        $cell2->setValueExplicit('ABC', DataType::TYPE_FORMULA);
-        self::assertEquals('ABC', $cell2->getCalculatedValue());
+
+        try {
+            $cell2->setValueExplicit('ABC', DataType::TYPE_FORMULA);
+            self::assertEquals('ABC', $cell2->getCalculatedValue());
+            self::fail('setValueExplicit with invalid formula should have thrown exception');
+        } catch (SpreadsheetException $e) {
+            self::assertStringContainsString('Invalid value for datatype Formula', $e->getMessage());
+        }
 
         $cell3 = $workSheet->getCell('A3');
         $cell3->setValueExplicit('=', DataType::TYPE_FORMULA);
diff --git a/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php b/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
new file mode 100644
index 0000000000..9914d7302c
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
@@ -0,0 +1,118 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PHPUnit\Framework\TestCase;
+
+class InternalFunctionsTest extends TestCase
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    /**
+     * @dataProvider anchorArrayDataProvider
+     */
+    public function testAnchorArrayFormula(string $reference, string $range, array $expectedResult): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet1 = $spreadsheet->getActiveSheet();
+        $sheet1->setTitle('SheetOne'); // no space in sheet title
+        $sheet2 = $spreadsheet->createSheet();
+        $sheet2->setTitle('Sheet Two'); // space in sheet title
+
+        $sheet1->setCellValue('C3', '=SEQUENCE(3,3,-4)');
+        $sheet2->setCellValue('C3', '=SEQUENCE(3,3, 9, -1)');
+        $sheet1->calculateArrays();
+        $sheet2->calculateArrays();
+        $sheet1->setCellValue('A8', "=ANCHORARRAY({$reference})");
+
+        $result1 = $sheet1->getCell('A8')->getCalculatedValue();
+        self::assertSame($expectedResult, $result1);
+        $attributes1 = $sheet1->getCell('A8')->getFormulaAttributes();
+        self::assertSame(['t' => 'array', 'ref' => $range], $attributes1);
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public static function anchorArrayDataProvider(): array
+    {
+        return [
+            [
+                'C3',
+                'A8:C10',
+                [[-4, -3, -2], [-1, 0, 1], [2, 3, 4]],
+            ],
+            [
+                "'Sheet Two'!C3",
+                'A8:C10',
+                [[9, 8, 7], [6, 5, 4], [3, 2, 1]],
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider singleDataProvider
+     */
+    public function testSingleArrayFormula(string $reference, mixed $expectedResult): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet1 = $spreadsheet->getActiveSheet();
+        $sheet1->setTitle('SheetOne'); // no space in sheet title
+        $sheet2 = $spreadsheet->createSheet();
+        $sheet2->setTitle('Sheet Two'); // space in sheet title
+
+        $sheet1->setCellValue('C3', '=SEQUENCE(3,3,-4)');
+        $sheet2->setCellValue('C3', '=SEQUENCE(3,3, 9, -1)');
+
+        $sheet1->setCellValue('A8', "=SINGLE({$reference})");
+        $sheet1->setCellValue('G3', 'three');
+        $sheet1->setCellValue('G4', 'four');
+        $sheet1->setCellValue('G5', 'five');
+        $sheet1->setCellValue('G7', 'seven');
+        $sheet1->setCellValue('G8', 'eight');
+        $sheet1->setCellValue('G9', 'nine');
+
+        $sheet1->calculateArrays();
+        $sheet2->calculateArrays();
+
+        $result1 = $sheet1->getCell('A8')->getCalculatedValue();
+        self::assertSame($expectedResult, $result1);
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public static function singleDataProvider(): array
+    {
+        return [
+            'array cell on same sheet' => [
+                'C3',
+                -4,
+            ],
+            'array cell on different sheet' => [
+                "'Sheet Two'!C3",
+                9,
+            ],
+            'range which includes current row' => [
+                'G7:G9',
+                'eight',
+            ],
+            'range which does not include current row' => [
+                'G3:G5',
+                '#VALUE!',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Cell/CellArrayFormulaTest.php b/tests/PhpSpreadsheetTests/Cell/CellArrayFormulaTest.php
new file mode 100644
index 0000000000..fd0d819bc6
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Cell/CellArrayFormulaTest.php
@@ -0,0 +1,114 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Cell;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Exception;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PHPUnit\Framework\TestCase;
+
+class CellArrayFormulaTest extends TestCase
+{
+    private string $arrayReturnType;
+
+    private bool $skipUpdateInSpillageRange = true;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testSetValueArrayFormulaNoSpillage(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $cell = $spreadsheet->getActiveSheet()->getCell('A1');
+        $cell->setValue('=MAX(ABS({5, -3; 1, -12}))');
+
+        self::assertSame(12, $cell->getCalculatedValue());
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testSetValueArrayFormulaWithSpillage(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $cell = $spreadsheet->getActiveSheet()->getCell('A1');
+        $cell->setValue('=SEQUENCE(3, 3, 1, 1)');
+
+        self::assertSame([[1, 2, 3], [4, 5, 6], [7, 8, 9]], $cell->getCalculatedValue());
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testSetValueInSpillageRangeCell(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $cell = $sheet->getCell('A1');
+        $cell->setValue('=SEQUENCE(3, 3, 1, 1)');
+
+        $cellAddress = 'C3';
+        $sheet->getCell($cellAddress)->setValue('x');
+
+        self::assertSame('#SPILL!', $sheet->getCell('A1')->getCalculatedValue());
+        self::assertSame('x', $sheet->getCell('C3')->getCalculatedValue());
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testUpdateValueInSpillageRangeCell(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue('=SEQUENCE(3, 3, 1, 1)');
+        $sheet->getCell('A1')->getCalculatedValue();
+        $attributes = $sheet->getCell('A1')->getFormulaAttributes();
+        if (!isset($attributes, $attributes['ref'])) {
+            self::fail('No formula attributes for cell A1');
+        }
+        $cellRange = $attributes['ref'];
+        $cellAddress = 'C3';
+        self::assertTrue($sheet->getCell($cellAddress)->isInRange($cellRange));
+        if ($this->skipUpdateInSpillageRange) {
+            $spreadsheet->disconnectWorksheets();
+            self::markTestIncomplete('Preventing update in spill range not yet implemented');
+        }
+
+        $this->expectException(Exception::class);
+        $this->expectExceptionMessage("Cell {$cellAddress} is within the spillage range of a formula, and cannot be changed");
+        $sheet->getCell($cellAddress)->setValue('PHP');
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testUpdateArrayFormulaForSpillageRange(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $calculation = Calculation::getInstance($spreadsheet);
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->getCell('A1')->setValue('=SEQUENCE(3, 3, 1, 1)');
+        $sheet->getCell('A1')->getCalculatedValue();
+        self::assertSame([[1, 2, 3], [4, 5, 6], [7, 8, 9]], $sheet->toArray(formatData: false, reduceArrays: true));
+
+        $sheet->getCell('A1')->setValue('=SEQUENCE(2, 2, 4, -1)');
+        $calculation->clearCalculationCache();
+        $sheet->getCell('A1')->getCalculatedValue();
+        self::assertSame([[4, 3, null], [2, 1, null], [null, null, null]], $sheet->toArray(formatData: false, reduceArrays: true));
+
+        $cellAddress = 'C3';
+        $sheet->getCell($cellAddress)->setValue('PHP');
+        self::assertSame('PHP', $sheet->getCell($cellAddress)->getValue(), 'change cell formerly in spill range');
+
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php b/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
new file mode 100644
index 0000000000..0852f2b183
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
@@ -0,0 +1,135 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Cell;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Cell\DataType;
+use PhpOffice\PhpSpreadsheet\Exception as SpreadsheetException;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PHPUnit\Framework\TestCase;
+
+class CellFormulaTest extends TestCase
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testSetFormulaExplicit(): void
+    {
+        $formula = '=A2+B2';
+
+        $spreadsheet = new Spreadsheet();
+        $cell = $spreadsheet->getActiveSheet()->getCell('A1');
+        $cell->setValueExplicit($formula, DataType::TYPE_FORMULA);
+
+        self::assertSame($formula, $cell->getValue());
+        self::assertTrue($cell->isFormula());
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testSetFormulaDeterminedByBinder(): void
+    {
+        $formula = '=A2+B2';
+
+        $spreadsheet = new Spreadsheet();
+        $cell = $spreadsheet->getActiveSheet()->getCell('A1');
+        $cell->setValue($formula);
+
+        self::assertSame($formula, $cell->getValue());
+        self::assertTrue($cell->isFormula());
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testSetFormulaInvalidValue(): void
+    {
+        $formula = true;
+
+        $spreadsheet = new Spreadsheet();
+        $cell = $spreadsheet->getActiveSheet()->getCell('A1');
+
+        try {
+            $cell->setValueExplicit($formula, DataType::TYPE_FORMULA);
+            self::fail('setValueExplicit should have thrown exception');
+        } catch (SpreadsheetException $e) {
+            self::assertStringContainsString('Invalid value for datatype Formula', $e->getMessage());
+        }
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testSetFormulaInvalidFormulaValue(): void
+    {
+        $formula = 'invalid formula';
+
+        $spreadsheet = new Spreadsheet();
+        $cell = $spreadsheet->getActiveSheet()->getCell('A1');
+
+        try {
+            $cell->setValueExplicit($formula, DataType::TYPE_FORMULA);
+            self::fail('setValueExplicit should have thrown exception');
+        } catch (SpreadsheetException $e) {
+            self::assertStringContainsString('Invalid value for datatype Formula', $e->getMessage());
+        }
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testSetArrayFormulaExplicitNoArray(): void
+    {
+        $formula = '=SUM(B2:B6*C2:C6)';
+
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->fromArray(
+            [
+                [1, 6],
+                [2, 7],
+                [3, 8],
+                [4, 9],
+                [5, 10],
+            ],
+            null,
+            'B2'
+        );
+        $sheet->getCell('A1')->setValueExplicit($formula, DataType::TYPE_FORMULA);
+
+        self::assertSame($formula, $sheet->getCell('A1')->getValue());
+        self::assertTrue($sheet->getCell('A1')->isFormula());
+        self::assertSame(130, $sheet->getCell('A1')->getCalculatedValue());
+        self::assertEmpty($sheet->getCell('A1')->getFormulaAttributes());
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testSetArrayFormulaExplicitWithRange(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $formula = '=SEQUENCE(3,3,-10,2.5)';
+
+        $spreadsheet = new Spreadsheet();
+        $cell = $spreadsheet->getActiveSheet()->getCell('A1');
+        $cell->setValueExplicit($formula, DataType::TYPE_FORMULA);
+
+        self::assertSame($formula, $cell->getValue());
+        self::assertTrue($cell->isFormula());
+        $expected = [
+            [-10.0, -7.5, -5.0],
+            [-2.5, 0.0, 2.5],
+            [5.0, 7.5, 10.0],
+        ];
+        self::assertSame($expected, $cell->getCalculatedValue());
+        self::assertSame(['t' => 'array', 'ref' => 'A1:C3'], $cell->getFormulaAttributes());
+
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormula2Test.php b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormula2Test.php
new file mode 100644
index 0000000000..ec41c3558c
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormula2Test.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Gnumeric;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Cell\DataType;
+use PhpOffice\PhpSpreadsheet\Reader\Gnumeric;
+use PHPUnit\Framework\TestCase;
+
+class ArrayFormula2Test extends TestCase
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    /**
+     * @dataProvider arrayFormulaReaderProvider
+     */
+    public function testArrayFormulaReader(
+        string $cellAddress,
+        string $expectedRange,
+        string $expectedFormula,
+        array $expectedValue
+    ): void {
+        $filename = 'tests/data/Reader/Gnumeric/ArrayFormulaTest2.gnumeric';
+        $reader = new Gnumeric();
+        $spreadsheet = $reader->load($filename);
+        $worksheet = $spreadsheet->getActiveSheet();
+
+        $cell = $worksheet->getCell($cellAddress);
+        self::assertSame(DataType::TYPE_FORMULA, $cell->getDataType());
+        self::assertSame(['t' => 'array', 'ref' => $expectedRange], $cell->getFormulaAttributes());
+        self::assertSame($expectedFormula, strtoupper($cell->getValue()));
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $worksheet->calculateArrays();
+        $cell = $worksheet->getCell($cellAddress);
+        self::assertSame($expectedValue, $cell->getCalculatedValue());
+        self::assertSame($expectedValue, $worksheet->rangeToArray($expectedRange, formatData: false, reduceArrays: true));
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public static function arrayFormulaReaderProvider(): array
+    {
+        return [
+            [
+                'D1',
+                'D1:E2',
+                '=MMULT(A1:B2,A4:B5)',
+                [[21, 26], [37, 46]],
+            ],
+            [
+                'G1',
+                'G1:J1',
+                '=SIN({-1,0,1,2})',
+                [[-0.8414709848078965, 0.0, 0.8414709848078965, 0.9092974268256817]],
+            ],
+            [
+                'D4',
+                'D4:E5',
+                '=MMULT(A7:B8,A10:B11)',
+                [[55, 64], [79, 92]],
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
new file mode 100644
index 0000000000..cba92a6d3d
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
@@ -0,0 +1,91 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Gnumeric;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Cell\DataType;
+use PhpOffice\PhpSpreadsheet\Reader\Gnumeric;
+use PHPUnit\Framework\TestCase;
+
+class ArrayFormulaTest extends TestCase
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    /**
+     * @dataProvider arrayFormulaReaderProvider
+     */
+    public function testArrayFormulaReader(
+        string $cellAddress,
+        string $expectedRange,
+        string $expectedFormula,
+        array $expectedValue
+    ): void {
+        $filename = 'tests/data/Reader/Gnumeric/ArrayFormulaTest.gnumeric';
+        $reader = new Gnumeric();
+        $spreadsheet = $reader->load($filename);
+        $worksheet = $spreadsheet->getActiveSheet();
+
+        $cell = $worksheet->getCell($cellAddress);
+        self::assertSame(DataType::TYPE_FORMULA, $cell->getDataType());
+        self::assertSame(['t' => 'array', 'ref' => $expectedRange], $cell->getFormulaAttributes());
+        self::assertSame($expectedFormula, strtoupper($cell->getValue()));
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $worksheet->calculateArrays();
+        $cell = $worksheet->getCell($cellAddress);
+        self::assertSame($expectedValue, $cell->getCalculatedValue());
+        self::assertSame($expectedValue, $worksheet->rangeToArray($expectedRange, formatData: false, reduceArrays: true));
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public static function arrayFormulaReaderProvider(): array
+    {
+        return [
+            [
+                'D1',
+                'D1:E2',
+                '=A1:B1*A1:A2',
+                [[4, 6], [8, 12]],
+            ],
+            [
+                'G1',
+                'G1:J1',
+                '=SIN({-1,0,1,2})',
+                [[-0.8414709848078965, 0.0, 0.8414709848078965, 0.9092974268256817]],
+            ],
+            [
+                'D4',
+                'D4:E5',
+                '=A4:B4*A4:A5',
+                [[9, 12], [15, 20]],
+            ],
+            [
+                'D7',
+                'D7:E8',
+                '=A7:B7*A7:A8',
+                [[16, 20], [24, 30]],
+            ],
+            [
+                'D10',
+                'D10:E11',
+                '=A10:B10*A10:A11',
+                [[25, 30], [35, 42]],
+            ],
+            [
+                'D13',
+                'D13:E14',
+                '=A13:B13*A13:A14',
+                [[36, 42], [48, 56]],
+            ],
+        ];
+    }
+}
diff --git a/tests/data/Reader/Gnumeric/ArrayFormulaTest.gnumeric b/tests/data/Reader/Gnumeric/ArrayFormulaTest.gnumeric
new file mode 100644
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diff --git a/tests/data/Reader/Gnumeric/ArrayFormulaTest2.gnumeric b/tests/data/Reader/Gnumeric/ArrayFormulaTest2.gnumeric
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From ef2b5b9e001bc239efedf4578b5f71c14b0ff2ae Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Fri, 21 Jun 2024 21:55:05 -0700
Subject: [PATCH 19/31] Mostly Docs and Tests

Also support for Xml format.
---
 docs/topics/recipes.md                        |  76 ++++++-------
 .../Internal/ExcelArrayPseudoFunctions.php    |   2 +-
 src/PhpSpreadsheet/Reader/Xml.php             |   8 ++
 src/PhpSpreadsheet/Worksheet/Worksheet.php    |  20 ++++
 .../Calculation/InternalFunctionsTest.php     |   4 +
 .../Functional/ArrayFunctionsSpillTest.php    |  48 +++++++++
 .../Reader/Gnumeric/ArrayFormulaTest.php      |  20 +++-
 .../Reader/Ods/ArrayFormulaTest.php           | 101 ++++++++++++++++++
 .../Reader/Xml/ArrayFormulaTest.php           |  26 +++++
 .../Writer/Ods/ArrayTest.php                  |  16 ++-
 .../Writer/Xlsx/ArrayFunctionsTest.php        |  66 +++++++++++-
 tests/data/Reader/Ods/ArrayFormulaTest.ods    | Bin 0 -> 14534 bytes
 tests/data/Reader/Xml/ArrayFormula.xml        |  75 +++++++++++++
 13 files changed, 410 insertions(+), 52 deletions(-)
 create mode 100644 tests/PhpSpreadsheetTests/Reader/Ods/ArrayFormulaTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Reader/Xml/ArrayFormulaTest.php
 create mode 100644 tests/data/Reader/Ods/ArrayFormulaTest.ods
 create mode 100644 tests/data/Reader/Xml/ArrayFormula.xml

diff --git a/docs/topics/recipes.md b/docs/topics/recipes.md
index a1cfebc5e2..5344d95a73 100644
--- a/docs/topics/recipes.md
+++ b/docs/topics/recipes.md
@@ -376,7 +376,7 @@ $value = $spreadsheet->getActiveSheet()->getCell('B8')->getCalculatedValue();
 ### Array Formulas
 
 With version 2.0.3 of PhpSpreadsheet, we've introduced support for Excel "array formulas".
-It is an opt-in feature. You need to enable it with the following code:
+**It is an opt-in feature.** You need to enable it with the following code:
 ```php
 \PhpOffice\PhpSpreadsheet\Calculation\Calculation::setArrayReturnType(
     \PhpOffice\PhpSpreadsheet\Calculation\Calculation::RETURN_ARRAY_AS_ARRAY);
@@ -405,15 +405,16 @@ However, we could have specified an alternative formula to calculate that result
 
 ![12-CalculationEngine-Array-Formula.png](./images/12-CalculationEngine-Array-Formula.png)
 
-Entering the formula `=SUM(B2:B6*C2:C6)` will calculate the same result; but because it's using arrays, we need to enter it as an "array formula". In MS Excel itself, we'd do this by using `Shift-Ctrl-Enter` rather than simply `Enter` when we define the formula in the formula edit box. MS Excel then shows that this is an array formula in the formula edit box by wrapping it in the `{}` braces (you don't enter these in the formula yourself; MS Excel does it).
-In recent releases of Excel, Shift-Ctrl-Enter is not required, and Excel does not add the braces.
-PhpSpreadsheet will attempt to behave like the recent releases.
+Entering the formula `=SUM(B2:B6*C2:C6)` will calculate the same result; but because it's using arrays, we need to enter it as an "array formula". In MS Excel itself, we'd do this by using `Ctrl-Shift-Enter` rather than simply `Enter` when we define the formula in the formula edit box. MS Excel then shows that this is an array formula in the formula edit box by wrapping it in the `{}` braces (you don't enter these in the formula yourself; MS Excel does it).
+
+**In recent releases of Excel, Ctrl-Shift-Enter is not required, and Excel does not add the braces.
+PhpSpreadsheet will attempt to behave like the recent releases.**
 
 Or to identify the biggest increase in like-for-like sales from one month to the next:
 
 ![12-CalculationEngine-Array-Formula-3.png](./images/12-CalculationEngine-Array-Formula-3.png)
 ```php
-$spreadsheet->getActiveSheet()->setCellValue('F1','=MAX(B2:B6-C2:C6)', true);
+$spreadsheet->getActiveSheet()->setCellValue('F1','=MAX(B2:B6-C2:C6)');
 ```
 Which tells us that the biggest increase in sales between December and January was 30 more (in this case, 30 more Lemons).
 
@@ -424,8 +425,8 @@ As an example, consider transposing a grid of data: MS Excel provides the `TRANS
 
 ![12-CalculationEngine-Array-Formula-2.png](./images/12-CalculationEngine-Array-Formula-2.png)
 
-When we do this in MS Excel, we need to indicate ___all___ the cells that will contain the transposed data from cells `A1` to `D7`. We do this by selecting the cells where we want to display our transposed data either by holding the left mouse button down while we move with the mouse, or pressing `Shift` and using the arrow keys.
-Once we've selected all the cells to hold our data, then we enter the formula `TRANSPOSE(A1:D7)` in the formula edit box, remembering to use `Shift-Ctrl-Enter` to tell MS Excel that this is an array formula.
+When we do this in MS Excel, we used to need to indicate ___all___ the cells that will contain the transposed data from cells `A1` to `D7`. We do this by selecting the cells where we want to display our transposed data either by holding the left mouse button down while we move with the mouse, or pressing `Shift` and using the arrow keys.
+Once we've selected all the cells to hold our data, then we enter the formula `TRANSPOSE(A1:D7)` in the formula edit box, remembering to use `Ctrl-Shift-Enter` to tell MS Excel that this is an array formula. In recent Excel, you can just enter `=TRANSPOSE(A1:D7)` into cell A10.
 
 Note also that we still set this as the formula for the top-left cell of that range, cell `A10`.
 
@@ -434,66 +435,40 @@ Simply setting an array formula in a cell and specifying the range won't populat
 $spreadsheet->getActiveSheet()
     ->setCellValue(
         'A10',
-        '=SEQUENCE(3,3)',
-        true,
-        'A1:C3'
+        '=SEQUENCE(3,3)'
     );
-
 // Will return a null, because the formula for A1 hasn't been calculated to populate the spillage area 
 $result = $spreadsheet->getActiveSheet()->getCell('C3')->getValue();
 ```
 To do that, we need to retrieve the calculated value for the cell.
 ```php
-$spreadsheet->getActiveSheet()
-    ->setCellValue(
-        'A10',
-        '=SEQUENCE(3,3)',
-        true,
-        'A1:C3'
-    );
-
 $spreadsheet->getActiveSheet()->getCell('A1')->getCalculatedValue();
-
 // Will return 9, because the formula for A1 has now been calculated, and the spillage area is populated 
 $result = $spreadsheet->getActiveSheet()->getCell('C3')->getValue();
 ```
-When we call `getCalculatedValue()` for a cell that contains an array formula, PhpSpreadsheet returns the single value that would appear in that cell in MS Excel.
+If returning arrays has been enabled, `getCalculatedValue` will return an array when appropriate, and will populate the spill range. If returning arrays has not been enabled, when we call `getCalculatedValue()` for a cell that contains an array formula, PhpSpreadsheet will return the single value from the topmost leftmost cell, and will leave other cells unchanged.
 ```php
 // Will return integer 1, the value for that cell within the array
 $a1result = $spreadsheet->getActiveSheet()->getCell('A1')->getCalculatedValue();
 ```
 
-If we want to return the full array, then we need to call `getCalculatedValue()` with an additional argument, a boolean `true` to return the value as an array.
-```php
-// Will return an array [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
-$a1result = $spreadsheet->getActiveSheet()->getCell('A1')->getCalculatedValue(true);
-```
-
 ---
 
 Excel365 introduced a number of new functions that return arrays of results.
 These include the `UNIQUE()`, `SORT()`, `SORTBY()`, `FILTER()`, `SEQUENCE()` and `RANDARRAY()` functions.
 While not all of these have been implemented by the Calculation Engine in PhpSpreadsheet, so they cannot all be calculated within your PHP applications, they can still be read from and written to Xlsx files.
 
-The way these functions are presented in MS Excel itself is slightly different to that of other array functions.
-
 The `SEQUENCE()` function generates a series of values (in this case, starting with `-10` and increasing in steps of `2.5`); and here we're telling the formula to populate a 3x3 grid with these values.
 
 ![12-CalculationEngine-Spillage-Formula.png](./images/12-CalculationEngine-Spillage-Formula.png)
 
-Note that this is visually different to the multi-cell array formulas like `TRANSPOSE()`. When we are positioned in the "spill" range for the grid, MS Excel highlights the area with a blue border; and the formula displayed in the formula editing field isn't wrapped in braces (`{}`).
+Note that this is visually different from using `Ctrl-Shift-Enter` for the formula. When we are positioned in the "spill" range for the grid, MS Excel highlights the area with a blue border; and the formula displayed in the formula editing field isn't wrapped in braces (`{}`).
 
 And if we select any other cell inside the "spill" area other than the top-left cell, the formula in the formula edit field is greyed rather than displayed in black.
 
 ![12-CalculationEngine-Spillage-Formula-2.png](./images/12-CalculationEngine-Spillage-Formula-2.png)
 
-When we enter this formula in MS Excel, we don't need to select the range of cells that it should occupy; nor do we need to enter it using `Ctrl-Shift-Enter`. MS Excel identifies that it is a multi-cell array formula because of the function that it uses, the `SEQUENCE()` function (and if there are nested function calls in the formula, then it must be the outermost functionin the tree).
-
-However, PhpSpreadsheet isn't quite as intelligent (yet) and doesn't parse the formula to identify if it should be treated as an array formula or not; a formula is just a string of characters until it is actually evaluated. If we want to use this function through code, we still need to specify that it is an "array" function with the `$isArrayFormula` argument, and the range of cells that it should cover.
-
-```php
-$spreadsheet->getActiveSheet()->setCellValue('A1','=SEQUENCE(3,3,-10,2.5)', true, 'A1:C3');
-```
+When we enter this formula in MS Excel, we don't need to select the range of cells that it should occupy; nor do we need to enter it using `Ctrl-Shift-Enter`.
 
 ### The Spill Operator
 
@@ -502,19 +477,34 @@ To simplify this, MS Excel has introduced the "Spill" Operator (`#`).
 
 ![12-CalculationEngine-Spillage-Operator.png](./images/12-CalculationEngine-Spillage-Operator.png)
 
-Using our `SEQUENCE()"`example, where the formula cell is `A1` and the result spills across the range `A1:C3`, we can use the Spill operator `A1#` to reference all the cells in that spillage range.
+Using our `SEQUENCE()`example, where the formula cell is `A1` and the result spills across the range `A1:C3`, we can use the Spill operator `A1#` to reference all the cells in that spillage range.
 In this case, we're taking the absolute value of each cell in that range, and adding them together using the `SUM()` function to give us a result of 50. 
 
-PhpSpreadsheet doesn't currently support entry of a formula like this directly; but interally MS Excel implements the Spill Operator as a function (`ANCHORARRAY()`). MS Excel itself doesn't allow you to use this function in a formula, you have to use the "Spill" operator; but PhpSpreadsheet does allow you to use this internal Excel function.
+PhpSpreadsheet supports entry of a formula like this using the Spill operator. Alternatively, MS Excel internally implements the Spill Operator as a function (`ANCHORARRAY()`). MS Excel itself doesn't allow you to use this function in a formula, you have to use the "Spill" operator; but PhpSpreadsheet does allow you to use this internal Excel function. PhpSpreadsheet will convert the spill operator to ANCHORARRAY on write (so it may appear that your formula has changed, but it hasn't really); it is not necessary to convert it back on read.
 
 To create this same function in PhpSpreadsheet, use:
 ```php
-$spreadsheet->getActiveSheet()->setCellValue('D1','=SUM(ABS(ANCHORARRAY(A1)))', true);
+$spreadsheet->getActiveSheet()->setCellValue('D1','=SUM(ABS(ANCHORARRAY(A1)))');
 ```
-Note that this does need to be flagged as an array function with the `$isArrayFormula` argument.
 
 When the file is saved, and opened in MS Excel, it will be rendered correctly.
 
+### The At-sign Operator
+
+If you want to reference just the first cell of an array formula within another formula, you could do so by prefixing it with an at-sign. You can also select the entry in a range which matches the current row in this way; so, if you enter `=@A1:A5` in cell G3, the result will be the value from A3. MS Excel again implements this under the covers by converting to a function SINGLE. PhpSpreadsheet allows the use of the SINGLE function. It does not yet support the at-sign operator, which can have a different meaning in other contexts.
+
+### Updating Cell in Spill Area
+
+Excel prevents you from updating a cell in the spill area. PhpSpreadsheet does not - it seems like it might be quite expensive, needing to reevaluate the entire worksheet with each `setValue`. PhpSpreadsheet does provide a method to be used prior to calling `setValue` if desired.
+```php
+$sheet->setCellValue('A1', '=SORT{7;5;1}');
+$sheet->getCell('A1')->getCalculatedValue(); // populates A1-A3
+$sheet->isCellInSpillRange('A2'); // true
+$sheet->isCellInSpillRange('A3'); // true
+$sheet->isCellInSpillRange('A4'); // false
+$sheet->isCellInSpillRange('A1'); // false
+```
+The last result might be surprising. Excel allows you to alter the formula cell itself, so `isCellInSpillRange` treats the formula cell as not in range. It should also be noted that, if array returns are not enabled, `isCellInSpillRange` will always return `false`.
 
 ## Locale Settings for Formulas
 
@@ -552,7 +542,7 @@ $spreadsheet->getActiveSheet()->setCellValue('B8',$internalFormula);
 ```
 
 Currently, formula translation only translates the function names, the
-constants TRUE and FALSE, and the function argument separators. Cell addressing using R1C1 formatting is not supported.
+constants TRUE and FALSE (and NULL), Excel error messages, and the function argument separators. Cell addressing using R1C1 formatting is not supported.
 
 At present, the following locale settings are supported:
 
@@ -576,6 +566,8 @@ Russian              | русский язык         | ru
 Swedish              | Svenska              | sv
 Turkish              | Türkçe               | tr
 
+If anybody can provide translations for additional languages, particularly Basque (Euskara), Catalan (Català), Croatian (Hrvatski jezik), Galician (Galego), Greek (Ελληνικά), Slovak (Slovenčina) or Slovenian (Slovenščina); please feel free to volunteer your services, and we'll happily show you what is needed to contribute a new language. 
+
 ## Write a newline character "\n" in a cell (ALT+"Enter")
 
 In Microsoft Office Excel you get a line break in a cell by hitting
diff --git a/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php b/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
index df7ccc5efc..2bccab8da6 100644
--- a/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
+++ b/src/PhpSpreadsheet/Calculation/Internal/ExcelArrayPseudoFunctions.php
@@ -20,7 +20,7 @@ public static function single(string $cellReference, Cell $cell): mixed
             $ourRow = $cell->getRow();
             $firstRow = (int) $matches[3];
             $lastRow = (int) $matches[6];
-            if ($ourRow < $firstRow || $ourRow > $lastRow) {
+            if ($ourRow < $firstRow || $ourRow > $lastRow || $matches[1] !== $matches[4]) {
                 return ExcelError::VALUE();
             }
             $referenceCellCoordinate = $matches[1] . $ourRow;
diff --git a/src/PhpSpreadsheet/Reader/Xml.php b/src/PhpSpreadsheet/Reader/Xml.php
index 979e74c5ef..e86fcd4c7a 100644
--- a/src/PhpSpreadsheet/Reader/Xml.php
+++ b/src/PhpSpreadsheet/Reader/Xml.php
@@ -403,11 +403,16 @@ public function loadIntoExisting(string $filename, Spreadsheet $spreadsheet, boo
 
                     $columnID = 'A';
                     foreach ($rowData->Cell as $cell) {
+                        $arrayRef = '';
                         $cell_ss = self::getAttributes($cell, self::NAMESPACES_SS);
                         if (isset($cell_ss['Index'])) {
                             $columnID = Coordinate::stringFromColumnIndex((int) $cell_ss['Index']);
                         }
                         $cellRange = $columnID . $rowID;
+                        if (isset($cell_ss['ArrayRange'])) {
+                            $arrayRange = (string) $cell_ss['ArrayRange'];
+                            $arrayRef = AddressHelper::convertFormulaToA1($arrayRange, $rowID, Coordinate::columnIndexFromString($columnID));
+                        }
 
                         if ($this->getReadFilter() !== null) {
                             if (!$this->getReadFilter()->readCell($columnID, $rowID, $worksheetName)) {
@@ -440,6 +445,9 @@ public function loadIntoExisting(string $filename, Spreadsheet $spreadsheet, boo
                         if (isset($cell_ss['Formula'])) {
                             $cellDataFormula = $cell_ss['Formula'];
                             $hasCalculatedValue = true;
+                            if ($arrayRef !== '') {
+                                $spreadsheet->getActiveSheet()->getCell($columnID . $rowID)->setFormulaAttributes(['t' => 'array', 'ref' => $arrayRef]);
+                            }
                         }
                         if (isset($cell->Data)) {
                             $cellData = $cell->Data;
diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
index 24d0c6365a..8119547d37 100644
--- a/src/PhpSpreadsheet/Worksheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -3695,4 +3695,24 @@ public function calculateArrays(bool $preCalculateFormulas = true): void
             }
         }
     }
+
+    public function isCellInSpillRange(string $coordinate): bool
+    {
+        if (Calculation::getArrayReturnType() !== Calculation::RETURN_ARRAY_AS_ARRAY) {
+            return false;
+        }
+        $this->calculateArrays();
+        $keys = $this->cellCollection->getCoordinates();
+        foreach ($keys as $key) {
+            $attributes = $this->getCell($key)->getFormulaAttributes();
+            if (isset($attributes['ref'])) {
+                if (Coordinate::coordinateIsInsideRange($attributes['ref'], $coordinate)) {
+                    // false for first cell in range, true otherwise
+                    return $coordinate !== $key;
+                }
+            }
+        }
+
+        return false;
+    }
 }
diff --git a/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php b/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
index 9914d7302c..d51d9a5fa7 100644
--- a/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
@@ -113,6 +113,10 @@ public static function singleDataProvider(): array
                 'G3:G5',
                 '#VALUE!',
             ],
+            'range which includes current row but spans columns' => [
+                'F7:G9',
+                '#VALUE!',
+            ],
         ];
     }
 }
diff --git a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
index 52d4c75a64..408ab9904b 100644
--- a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
+++ b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
@@ -37,6 +37,12 @@ public function testArrayOutput(): void
         $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
         $expected = [['#SPILL!'], [null], [null], [null], ['OCCUPIED']];
         self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'spill with B5 unchanged');
+        self::assertFalse($sheet->isCellInSpillRange('B1'));
+        self::assertFalse($sheet->isCellInSpillRange('B2'));
+        self::assertFalse($sheet->isCellInSpillRange('B3'));
+        self::assertFalse($sheet->isCellInSpillRange('B4'));
+        self::assertFalse($sheet->isCellInSpillRange('B5'));
+        self::assertFalse($sheet->isCellInSpillRange('Z9'));
         $calculation->clearCalculationCache();
 
         $columnArray = [[1], [2], [2], [2], [3], [3], [3], [3], [4], [4], [4], [4]];
@@ -44,6 +50,12 @@ public function testArrayOutput(): void
         $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
         $expected = [[1], [2], [3], [4], ['OCCUPIED']];
         self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'fill B1:B4 with B5 unchanged');
+        self::assertFalse($sheet->isCellInSpillRange('B1'));
+        self::assertTrue($sheet->isCellInSpillRange('B2'));
+        self::assertTrue($sheet->isCellInSpillRange('B3'));
+        self::assertTrue($sheet->isCellInSpillRange('B4'));
+        self::assertFalse($sheet->isCellInSpillRange('B5'));
+        self::assertFalse($sheet->isCellInSpillRange('Z9'));
         $calculation->clearCalculationCache();
 
         $columnArray = [[1], [3], [3], [3], [3], [3], [3], [3], [3], [3], [3], [3]];
@@ -51,6 +63,12 @@ public function testArrayOutput(): void
         $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
         $expected = [[1], [3], [null], [null], ['OCCUPIED']];
         self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'fill B1:B2(changed from prior) set B3:B4 to null B5 unchanged');
+        self::assertFalse($sheet->isCellInSpillRange('B1'));
+        self::assertTrue($sheet->isCellInSpillRange('B2'));
+        self::assertFalse($sheet->isCellInSpillRange('B3'));
+        self::assertFalse($sheet->isCellInSpillRange('B4'));
+        self::assertFalse($sheet->isCellInSpillRange('B5'));
+        self::assertFalse($sheet->isCellInSpillRange('Z9'));
         $calculation->clearCalculationCache();
 
         $columnArray = [[1], [2], [3], [3], [3], [3], [3], [3], [3], [3], [3], [3]];
@@ -67,6 +85,36 @@ public function testArrayOutput(): void
         self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'spill clears B2:B4 with B5 unchanged');
         $calculation->clearCalculationCache();
 
+        $sheet->setCellValue('Z1', '=SORT({7;5;1})');
+        $sheet->getCell('Z1')->getCalculatedValue(); // populates Z1-Z3
+        self::assertTrue($sheet->isCellInSpillRange('Z2'));
+        self::assertTrue($sheet->isCellInSpillRange('Z3'));
+        self::assertFalse($sheet->isCellInSpillRange('Z4'));
+        self::assertFalse($sheet->isCellInSpillRange('Z1'));
+
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public function testNonArrayOutput(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $calculation = Calculation::getInstance($spreadsheet);
+
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->setCellValue('B5', 'OCCUPIED');
+
+        $columnArray = [[1], [2], [2], [2], [3], [3], [3], [3], [4], [4], [4], [4]];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('B1', '=UNIQUE(A1:A12)');
+        $expected = [[1], [null], [null], [null], ['OCCUPIED']];
+        self::assertSame($expected, $sheet->rangeToArray('B1:B5', calculateFormulas: true, formatData: false, reduceArrays: true), 'only fill B1');
+        self::assertFalse($sheet->isCellInSpillRange('B1'));
+        self::assertFalse($sheet->isCellInSpillRange('B2'));
+        self::assertFalse($sheet->isCellInSpillRange('B3'));
+        self::assertFalse($sheet->isCellInSpillRange('B4'));
+        self::assertFalse($sheet->isCellInSpillRange('B5'));
+        self::assertFalse($sheet->isCellInSpillRange('Z9'));
+
         $spreadsheet->disconnectWorksheets();
     }
 
diff --git a/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
index cba92a6d3d..861a2e05e2 100644
--- a/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
+++ b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
@@ -28,7 +28,7 @@ public function testArrayFormulaReader(
         string $cellAddress,
         string $expectedRange,
         string $expectedFormula,
-        array $expectedValue
+        array|float $expectedValue
     ): void {
         $filename = 'tests/data/Reader/Gnumeric/ArrayFormulaTest.gnumeric';
         $reader = new Gnumeric();
@@ -37,13 +37,21 @@ public function testArrayFormulaReader(
 
         $cell = $worksheet->getCell($cellAddress);
         self::assertSame(DataType::TYPE_FORMULA, $cell->getDataType());
-        self::assertSame(['t' => 'array', 'ref' => $expectedRange], $cell->getFormulaAttributes());
+        if (is_array($expectedValue)) {
+            self::assertSame(['t' => 'array', 'ref' => $expectedRange], $cell->getFormulaAttributes());
+        } else {
+            self::assertEmpty($cell->getFormulaAttributes());
+        }
         self::assertSame($expectedFormula, strtoupper($cell->getValue()));
         Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $worksheet->calculateArrays();
         $cell = $worksheet->getCell($cellAddress);
         self::assertSame($expectedValue, $cell->getCalculatedValue());
-        self::assertSame($expectedValue, $worksheet->rangeToArray($expectedRange, formatData: false, reduceArrays: true));
+        if (is_array($expectedValue)) {
+            self::assertSame($expectedValue, $worksheet->rangeToArray($expectedRange, formatData: false, reduceArrays: true));
+        } else {
+            self::assertSame([[$expectedValue]], $worksheet->rangeToArray($expectedRange, formatData: false, reduceArrays: true));
+        }
         $spreadsheet->disconnectWorksheets();
     }
 
@@ -62,6 +70,12 @@ public static function arrayFormulaReaderProvider(): array
                 '=SIN({-1,0,1,2})',
                 [[-0.8414709848078965, 0.0, 0.8414709848078965, 0.9092974268256817]],
             ],
+            [
+                'G3',
+                'G3:G3',
+                '=MAX(SIN({-1,0,1,2}))',
+                0.9092974268256817,
+            ],
             [
                 'D4',
                 'D4:E5',
diff --git a/tests/PhpSpreadsheetTests/Reader/Ods/ArrayFormulaTest.php b/tests/PhpSpreadsheetTests/Reader/Ods/ArrayFormulaTest.php
new file mode 100644
index 0000000000..2b37d33146
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Reader/Ods/ArrayFormulaTest.php
@@ -0,0 +1,101 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Ods;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Cell\DataType;
+use PhpOffice\PhpSpreadsheet\Reader\Ods;
+use PHPUnit\Framework\TestCase;
+
+class ArrayFormulaTest extends TestCase
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    /**
+     * @dataProvider arrayFormulaReaderProvider
+     */
+    public function testArrayFormulaReader(
+        string $cellAddress,
+        string $expectedRange,
+        string $expectedFormula,
+        array|float $expectedValue
+    ): void {
+        $filename = 'tests/data/Reader/Ods/ArrayFormulaTest.ods';
+        $reader = new Ods();
+        $spreadsheet = $reader->load($filename);
+        $worksheet = $spreadsheet->getActiveSheet();
+
+        $cell = $worksheet->getCell($cellAddress);
+        self::assertSame(DataType::TYPE_FORMULA, $cell->getDataType());
+        self::assertSame(['t' => 'array', 'ref' => $expectedRange], $cell->getFormulaAttributes());
+        self::assertSame($expectedFormula, strtoupper($cell->getValue()));
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $worksheet->calculateArrays();
+        $cell = $worksheet->getCell($cellAddress);
+        self::assertSame($expectedValue, $cell->getCalculatedValue());
+        if (is_array($expectedValue)) {
+            self::assertSame($expectedValue, $worksheet->rangeToArray($expectedRange, formatData: false, reduceArrays: true));
+        } else {
+            self::assertSame([[$expectedValue]], $worksheet->rangeToArray($expectedRange, formatData: false, reduceArrays: true));
+        }
+        $spreadsheet->disconnectWorksheets();
+    }
+
+    public static function arrayFormulaReaderProvider(): array
+    {
+        return [
+            [
+                'B2',
+                'B2:C3',
+                '={2,3}*{4;5}',
+                [[8, 12], [10, 15]],
+            ],
+            [
+                'E1',
+                'E1:H1',
+                '=SIN({-1,0,1,2})',
+                [[-0.8414709848078965, 0.0, 0.8414709848078965, 0.9092974268256817]],
+            ],
+            [
+                'E3',
+                'E3:E3',
+                '=MAX(SIN({-1,0,1,2}))',
+                0.9092974268256817,
+            ],
+            [
+                'D5',
+                'D5:E6',
+                '=A5:B5*A5:A6',
+                [[4, 6], [8, 12]],
+            ],
+            [
+                'D8',
+                'D8:E9',
+                '=A8:B8*A8:A9',
+                [[9, 12], [15, 20]],
+            ],
+            [
+                'D11',
+                'D11:E12',
+                '=A11:B11*A11:A12',
+                [[16, 20], [24, 30]],
+            ],
+            [
+                'D14',
+                'D14:E15',
+                '=A14:B14*A14:A15',
+                [[25, 30], [35, 42]],
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Reader/Xml/ArrayFormulaTest.php b/tests/PhpSpreadsheetTests/Reader/Xml/ArrayFormulaTest.php
new file mode 100644
index 0000000000..6ba32aa334
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Reader/Xml/ArrayFormulaTest.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Xml;
+
+use PhpOffice\PhpSpreadsheet\Cell\DataType;
+use PhpOffice\PhpSpreadsheet\Reader\Xml;
+use PHPUnit\Framework\TestCase;
+
+class ArrayFormulaTest extends TestCase
+{
+    public function testArrayFormulaReader(): void
+    {
+        $filename = 'tests/data/Reader/Xml/ArrayFormula.xml';
+        $reader = new Xml();
+        $spreadsheet = $reader->load($filename);
+        $sheet = $spreadsheet->getActiveSheet();
+
+        self::assertSame(DataType::TYPE_FORMULA, $sheet->getCell('B1')->getDataType());
+        self::assertSame(['t' => 'array', 'ref' => 'B1:B3'], $sheet->getCell('B1')->getFormulaAttributes());
+        self::assertSame('=CONCATENATE(A1:A3,"-",C1:C3)', strtoupper($sheet->getCell('B1')->getValue()));
+        self::assertSame('a-1', $sheet->getCell('B1')->getOldCalculatedValue());
+        self::assertSame('b-2', $sheet->getCell('B2')->getValue());
+        self::assertSame('c-3', $sheet->getCell('B3')->getValue());
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php b/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
index 07f945477a..281b1c8656 100644
--- a/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
@@ -63,12 +63,20 @@ public function testArray(): void
         $sheet->getCell('B1')->setValue('=UNIQUE(A1:A3)');
         $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Ods');
         $sheet = $reloadedSpreadsheet->getActiveSheet();
-        self::assertEquals('1', $sheet->getCell('A1')->getValue());
-        self::assertEquals('1', $sheet->getCell('A2')->getValue());
-        self::assertEquals('3', $sheet->getCell('A3')->getValue());
-        self::assertEquals('3', $sheet->getCell('B2')->getValue());
+        self::assertSame(1, $sheet->getCell('A1')->getValue());
+        self::assertSame(1, $sheet->getCell('A2')->getValue());
+        self::assertSame(3, $sheet->getCell('A3')->getValue());
+        self::assertSame(3, $sheet->getCell('B2')->getValue());
+        self::assertTrue($sheet->getCell('B1')->isFormula());
+        self::assertSame(1, $sheet->getCell('B1')->getOldCalculatedValue());
         self::assertNull($sheet->getCell('B3')->getValue());
         self::assertEquals('=UNIQUE(A1:A3)', $sheet->getCell('B1')->getValue());
+        $cellFormulaAttributes = $sheet->getCell('B1')->getFormulaAttributes();
+        self::assertArrayHasKey('t', $cellFormulaAttributes);
+        self::assertSame('array', $cellFormulaAttributes['t']);
+        self::assertArrayHasKey('ref', $cellFormulaAttributes);
+        self::assertSame('B1:B2', $cellFormulaAttributes['ref']);
+        self::assertSame([[1], [3]], $sheet->getCell('B1')->getCalculatedValue());
         $spreadsheet->disconnectWorksheets();
         $reloadedSpreadsheet->disconnectWorksheets();
     }
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index d7265651d8..038f8c2351 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -333,10 +333,18 @@ public function testArrayMultipleColumns(): void
         self::assertSame($expectedUnique, $sheet2->getCell('H1')->getCalculatedValue());
         for ($row = 1; $row <= 5; ++$row) {
             if ($row > 1) {
-                self::assertSame($expectedUnique[$row - 1][0], $sheet2->getCell("H$row")->getCalculatedValue(), "cell H$row");
+                self::assertSame($expectedUnique[$row - 1][0], $sheet2->getCell("H$row")->getValue(), "cell H$row");
+            } else {
+                self::assertTrue($sheet2->getCell("H$row")->isFormula());
+                self::assertSame($expectedUnique[$row - 1][0], $sheet2->getCell("H$row")->getOldCalculatedValue(), "cell H$row");
             }
-            self::assertSame($expectedUnique[$row - 1][1], $sheet2->getCell("I$row")->getCalculatedValue(), "cell I$row");
+            self::assertSame($expectedUnique[$row - 1][1], $sheet2->getCell("I$row")->getValue(), "cell I$row");
         }
+        $cellFormulaAttributes = $sheet2->getCell('H1')->getFormulaAttributes();
+        self::assertArrayHasKey('t', $cellFormulaAttributes);
+        self::assertSame('array', $cellFormulaAttributes['t']);
+        self::assertArrayHasKey('ref', $cellFormulaAttributes);
+        self::assertSame('H1:I5', $cellFormulaAttributes['ref']);
         $spreadsheet2->disconnectWorksheets();
     }
 
@@ -374,4 +382,58 @@ public function testSpill(): void
         self::assertSame('x', $sheet2->getCell('A3')->getValue());
         $spreadsheet2->disconnectWorksheets();
     }
+
+    public function testArrayStringOutput(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $columnArray = [
+            ['item1'],
+            ['item2'],
+            ['item3'],
+            ['item1'],
+            ['item1'],
+            ['item6'],
+            ['item7'],
+            ['item1'],
+            ['item9'],
+            ['item1'],
+        ];
+        $sheet->fromArray($columnArray, 'A1');
+        $sheet->setCellValue('C1', '=UNIQUE(A1:A10)');
+        $writer = new XlsxWriter($spreadsheet);
+        $this->outputFile = File::temporaryFilename();
+        $writer->save($this->outputFile);
+        $spreadsheet->disconnectWorksheets();
+
+        $reader = new XlsxReader();
+        $spreadsheet2 = $reader->load($this->outputFile);
+        $sheet2 = $spreadsheet2->getActiveSheet();
+        $expectedUnique = [
+            ['item1'],
+            ['item2'],
+            ['item3'],
+            ['item6'],
+            ['item7'],
+            ['item9'],
+        ];
+        self::assertCount(6, $expectedUnique);
+        self::assertSame($expectedUnique, $sheet2->getCell('C1')->getCalculatedValue());
+        self::assertSame($expectedUnique[0][0], $sheet2->getCell('C1')->getCalculatedValueString());
+        for ($row = 2; $row <= 6; ++$row) {
+            self::assertSame($expectedUnique[$row - 1][0], $sheet2->getCell("C$row")->getCalculatedValue(), "cell C$row");
+        }
+        $spreadsheet2->disconnectWorksheets();
+
+        $file = 'zip://';
+        $file .= $this->outputFile;
+        $file .= '#xl/worksheets/sheet1.xml';
+        $data = file_get_contents($file);
+        if ($data === false) {
+            self::fail('Unable to read file');
+        } else {
+            self::assertStringContainsString('<c r="C1" cm="1" t="str"><f t="array" ref="C1:C6" aca="1" ca="1">_xlfn.UNIQUE(A1:A10)</f><v>item1</v></c>', $data, '6 results for UNIQUE');
+        }
+    }
 }
diff --git a/tests/data/Reader/Ods/ArrayFormulaTest.ods b/tests/data/Reader/Ods/ArrayFormulaTest.ods
new file mode 100644
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diff --git a/tests/data/Reader/Xml/ArrayFormula.xml b/tests/data/Reader/Xml/ArrayFormula.xml
new file mode 100644
index 0000000000..602a1b8a84
--- /dev/null
+++ b/tests/data/Reader/Xml/ArrayFormula.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0"?>
+<?mso-application progid="Excel.Sheet"?>
+<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
+ xmlns:o="urn:schemas-microsoft-com:office:office"
+ xmlns:x="urn:schemas-microsoft-com:office:excel"
+ xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
+ xmlns:html="http://www.w3.org/TR/REC-html40">
+ <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
+  <Author>Owen Leibman</Author>
+  <LastAuthor>Owen Leibman</LastAuthor>
+  <Created>2024-06-17T19:03:14Z</Created>
+  <LastSaved>2024-06-17T19:04:33Z</LastSaved>
+  <Version>16.00</Version>
+ </DocumentProperties>
+ <OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">
+  <AllowPNG/>
+ </OfficeDocumentSettings>
+ <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">
+  <WindowHeight>10300</WindowHeight>
+  <WindowWidth>19420</WindowWidth>
+  <WindowTopX>32767</WindowTopX>
+  <WindowTopY>32767</WindowTopY>
+  <ProtectStructure>False</ProtectStructure>
+  <ProtectWindows>False</ProtectWindows>
+ </ExcelWorkbook>
+ <Styles>
+  <Style ss:ID="Default" ss:Name="Normal">
+   <Alignment ss:Vertical="Bottom"/>
+   <Borders/>
+   <Font ss:FontName="Aptos Narrow" x:Family="Swiss" ss:Size="11"
+    ss:Color="#000000"/>
+   <Interior/>
+   <NumberFormat/>
+   <Protection/>
+  </Style>
+ </Styles>
+ <Worksheet ss:Name="Sheet1">
+  <Table ss:ExpandedColumnCount="3" ss:ExpandedRowCount="3" x:FullColumns="1"
+   x:FullRows="1" ss:DefaultRowHeight="14.5">
+   <Row>
+    <Cell><Data ss:Type="String">a</Data></Cell>
+    <Cell ss:ArrayRange="RC:R[2]C"
+     ss:Formula="=CONCATENATE(RC[-1]:R[2]C[-1],&quot;-&quot;,RC[1]:R[2]C[1])"><Data
+      ss:Type="String">a-1</Data></Cell>
+    <Cell><Data ss:Type="Number">1</Data></Cell>
+   </Row>
+   <Row>
+    <Cell><Data ss:Type="String">b</Data></Cell>
+    <Cell><Data ss:Type="String">b-2</Data></Cell>
+    <Cell><Data ss:Type="Number">2</Data></Cell>
+   </Row>
+   <Row>
+    <Cell><Data ss:Type="String">c</Data></Cell>
+    <Cell><Data ss:Type="String">c-3</Data></Cell>
+    <Cell><Data ss:Type="Number">3</Data></Cell>
+   </Row>
+  </Table>
+  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
+   <PageSetup>
+    <Header x:Margin="0.3"/>
+    <Footer x:Margin="0.3"/>
+    <PageMargins x:Bottom="0.75" x:Left="0.7" x:Right="0.7" x:Top="0.75"/>
+   </PageSetup>
+   <Selected/>
+   <Panes>
+    <Pane>
+     <Number>3</Number>
+     <ActiveCol>2</ActiveCol>
+    </Pane>
+   </Panes>
+   <ProtectObjects>False</ProtectObjects>
+   <ProtectScenarios>False</ProtectScenarios>
+  </WorksheetOptions>
+ </Worksheet>
+</Workbook>

From fed7a32298687e3840e00d6ec85fdd2cd59787f8 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Fri, 21 Jun 2024 22:30:12 -0700
Subject: [PATCH 20/31] Dead Code

---
 tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
index 408ab9904b..6b46821d95 100644
--- a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
+++ b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
@@ -98,7 +98,6 @@ public function testArrayOutput(): void
     public function testNonArrayOutput(): void
     {
         $spreadsheet = new Spreadsheet();
-        $calculation = Calculation::getInstance($spreadsheet);
 
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->setCellValue('B5', 'OCCUPIED');

From 2076a07190714b20590c720b4da92ab15e71bce1 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Sat, 22 Jun 2024 21:11:19 -0700
Subject: [PATCH 21/31] Minor Tweaks

---
 .../Calculation/Calculation.php               |  2 +-
 src/PhpSpreadsheet/Cell/Cell.php              |  4 +--
 .../Calculation/CalculationTest.php           | 33 +++++++++++++++----
 .../Cell/CellFormulaTest.php                  | 21 ++----------
 4 files changed, 31 insertions(+), 29 deletions(-)

diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index f2523b8a2c..76b1a54f67 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -3652,7 +3652,7 @@ public function _calculateFormulaValue(string $formula, ?string $cellID = null,
         //    Basic validation that this is indeed a formula
         //    We simply return the cell value if not
         $formula = trim($formula);
-        if ($formula[0] != '=') {
+        if ($formula === '' || $formula[0] !== '=') {
             return self::wrapResult($formula);
         }
         $formula = ltrim(substr($formula, 1));
diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index 2a5fff9fcf..d6d9d9a12f 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -275,8 +275,8 @@ public function setValueExplicit(mixed $value, string $dataType = DataType::TYPE
 
                 break;
             case DataType::TYPE_FORMULA:
-                if (!is_string($value) || $value[0] !== '=') {
-                    throw new SpreadsheetException('Invalid value for datatype Formula');
+                if ($value !== null && !is_scalar($value) && !($value instanceof Stringable)) {
+                    throw new SpreadsheetException('Invalid unstringable value for datatype Formula');
                 }
                 $this->value = (string) $value;
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/CalculationTest.php b/tests/PhpSpreadsheetTests/Calculation/CalculationTest.php
index 76621d4813..24f9d93ccc 100644
--- a/tests/PhpSpreadsheetTests/Calculation/CalculationTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/CalculationTest.php
@@ -89,6 +89,7 @@ public function testFormulaWithOptionalArgumentsAndRequiredCellReferenceShouldPa
         $cell = $sheet->getCell('F6');
         $cell->setValue('=OFFSET(D3, -1, -2)');
         self::assertEquals(5, $cell->getCalculatedValue(), 'missing arguments should be filled with null');
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testCellSetAsQuotedText(): void
@@ -103,18 +104,27 @@ public function testCellSetAsQuotedText(): void
         self::assertEquals("=cmd|'/C calc'!A0", $cell->getCalculatedValue());
 
         $cell2 = $workSheet->getCell('A2');
+        $cell2->setValueExplicit('ABC', DataType::TYPE_FORMULA);
+        self::assertEquals('ABC', $cell2->getCalculatedValue());
+
+        $cell3 = $workSheet->getCell('A3');
+        $cell3->setValueExplicit('=', DataType::TYPE_FORMULA);
+        self::assertEquals('', $cell3->getCalculatedValue());
+
+        $cell4 = $workSheet->getCell('A4');
 
         try {
-            $cell2->setValueExplicit('ABC', DataType::TYPE_FORMULA);
-            self::assertEquals('ABC', $cell2->getCalculatedValue());
-            self::fail('setValueExplicit with invalid formula should have thrown exception');
+            $cell4->setValueExplicit((object) null, DataType::TYPE_FORMULA);
+            self::fail('setValueExplicit formula with unstringable object should have thrown exception');
         } catch (SpreadsheetException $e) {
-            self::assertStringContainsString('Invalid value for datatype Formula', $e->getMessage());
+            self::assertStringContainsString('Invalid unstringable value for datatype Formula', $e->getMessage());
         }
 
-        $cell3 = $workSheet->getCell('A3');
-        $cell3->setValueExplicit('=', DataType::TYPE_FORMULA);
-        self::assertEquals('', $cell3->getCalculatedValue());
+        $cell5 = $workSheet->getCell('A5');
+        $cell5->setValueExplicit(null, DataType::TYPE_FORMULA);
+        self::assertEquals('', $cell5->getCalculatedValue());
+
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testCellWithDdeExpresion(): void
@@ -126,6 +136,7 @@ public function testCellWithDdeExpresion(): void
         $cell->setValue("=cmd|'/C calc'!A0");
 
         self::assertEquals("=cmd|'/C calc'!A0", $cell->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testFormulaReferencingWorksheetWithEscapedApostrophe(): void
@@ -144,6 +155,7 @@ public function testFormulaReferencingWorksheetWithEscapedApostrophe(): void
 
         $cellValue = $workSheet->getCell('A2')->getCalculatedValue();
         self::assertSame('HELLO WORLD', $cellValue);
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testFormulaReferencingWorksheetWithUnescapedApostrophe(): void
@@ -162,6 +174,7 @@ public function testFormulaReferencingWorksheetWithUnescapedApostrophe(): void
 
         $cellValue = $workSheet->getCell('A2')->getCalculatedValue();
         self::assertSame('HELLO WORLD', $cellValue);
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testCellWithFormulaTwoIndirect(): void
@@ -178,6 +191,7 @@ public function testCellWithFormulaTwoIndirect(): void
         $cell3->setValue('=SUM(INDIRECT("A"&ROW()),INDIRECT("B"&ROW()),INDIRECT("C"&ROW()))');
 
         self::assertEquals('9', $cell3->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testCellWithStringNumeric(): void
@@ -190,6 +204,7 @@ public function testCellWithStringNumeric(): void
         $cell2->setValue('=100*A1');
 
         self::assertSame(250.0, $cell2->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testCellWithStringFraction(): void
@@ -202,6 +217,7 @@ public function testCellWithStringFraction(): void
         $cell2->setValue('=100*A1');
 
         self::assertSame(75.0, $cell2->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testCellWithStringPercentage(): void
@@ -214,6 +230,7 @@ public function testCellWithStringPercentage(): void
         $cell2->setValue('=100*A1');
 
         self::assertSame(2.0, $cell2->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testCellWithStringCurrency(): void
@@ -228,6 +245,7 @@ public function testCellWithStringCurrency(): void
         $cell2->setValue('=100*A1');
 
         self::assertSame(200.0, $cell2->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
     }
 
     public function testBranchPruningFormulaParsingSimpleCase(): void
@@ -400,6 +418,7 @@ public function testFullExecutionDataPruning(
         $calculation->disableBranchPruning();
         $calculated = $cell->getCalculatedValue();
         self::assertEquals($expectedResult, $calculated);
+        $spreadsheet->disconnectWorksheets();
     }
 
     public static function dataProviderBranchPruningFullExecution(): array
diff --git a/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php b/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
index 0852f2b183..057d9fec9c 100644
--- a/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
+++ b/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
@@ -52,7 +52,7 @@ public function testSetFormulaDeterminedByBinder(): void
 
     public function testSetFormulaInvalidValue(): void
     {
-        $formula = true;
+        $formula = (object) true;
 
         $spreadsheet = new Spreadsheet();
         $cell = $spreadsheet->getActiveSheet()->getCell('A1');
@@ -61,24 +61,7 @@ public function testSetFormulaInvalidValue(): void
             $cell->setValueExplicit($formula, DataType::TYPE_FORMULA);
             self::fail('setValueExplicit should have thrown exception');
         } catch (SpreadsheetException $e) {
-            self::assertStringContainsString('Invalid value for datatype Formula', $e->getMessage());
-        }
-
-        $spreadsheet->disconnectWorksheets();
-    }
-
-    public function testSetFormulaInvalidFormulaValue(): void
-    {
-        $formula = 'invalid formula';
-
-        $spreadsheet = new Spreadsheet();
-        $cell = $spreadsheet->getActiveSheet()->getCell('A1');
-
-        try {
-            $cell->setValueExplicit($formula, DataType::TYPE_FORMULA);
-            self::fail('setValueExplicit should have thrown exception');
-        } catch (SpreadsheetException $e) {
-            self::assertStringContainsString('Invalid value for datatype Formula', $e->getMessage());
+            self::assertStringContainsString('Invalid unstringable value for datatype Formula', $e->getMessage());
         }
 
         $spreadsheet->disconnectWorksheets();

From b051d4946cca0c01ab9b7ff9f9e62b3a954ebca9 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Sat, 29 Jun 2024 23:28:21 -0700
Subject: [PATCH 22/31] Use CELL("width") As Another Unimplemented Array
 Function

I might want to implement CHOOSECOLS after this PR is merged.
---
 src/PhpSpreadsheet/Reader/Xlsx.php            |   2 +-
 .../Writer/Xlsx/ArrayFunctionsTest.php        |   4 ++++
 tests/data/Reader/XLSX/atsign.choosecols.xlsx | Bin 9555 -> 9629 bytes
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
index e976fd8360..c45700cc4b 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -854,7 +854,7 @@ protected function loadSpreadsheetFromFile(string $filename): Spreadsheet
 
                                                 break;
                                             case 'b':
-                                                if (!isset($c->f)) {
+                                                if (!isset($c->f) || ((string) $c->f) === '') {
                                                     if (isset($c->v)) {
                                                         $value = self::castToBoolean($c);
                                                     } else {
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index 038f8c2351..58a84826d0 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -285,6 +285,9 @@ public function testUnimplementedArrayOutput(): void
         ];
         $actualFG = $sheet2->rangeToArray('F1:G5');
         self::assertSame($expectedFG, $actualFG);
+        self::assertSame('=CELL("width")', $sheet2->getCell('I1')->getValue());
+        self::assertSame(8, $sheet2->getCell('I1')->getCalculatedValue());
+        self::assertTrue($sheet2->getCell('J1')->getValue());
         $spreadsheet2->disconnectWorksheets();
 
         $file = 'zip://';
@@ -295,6 +298,7 @@ public function testUnimplementedArrayOutput(): void
             self::fail('Unable to read file');
         } else {
             self::assertStringContainsString('<f t="array" ref="F1:G5" aca="1" ca="1">_xlfn.CHOOSECOLS(A1:C5,3,1)</f><v>11</v>', $data);
+            self::assertStringContainsString('<f t="array" ref="I1:J1" aca="1" ca="1">CELL(&quot;width&quot;)</f><v>8</v></c><c r="J1" t="b"><v>1</v></c>', $data);
         }
     }
 
diff --git a/tests/data/Reader/XLSX/atsign.choosecols.xlsx b/tests/data/Reader/XLSX/atsign.choosecols.xlsx
index 45ea6ca2ae5a7613923705d5105b70c8a030a635..2f039bbe2e0f772dfe433570dc76679f09d8967c 100644
GIT binary patch
delta 2876
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From 1253f358bfe664dfd2fe6bc966766d92822dece5 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Sun, 30 Jun 2024 00:02:46 -0700
Subject: [PATCH 23/31] Resolve Merge Conflict

---
 src/PhpSpreadsheet/Cell/Cell.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index d6d9d9a12f..880cc609fc 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -385,10 +385,10 @@ public function getCalculatedValue(bool $resetLog = true): mixed
 
         if ($this->dataType === DataType::TYPE_FORMULA) {
             try {
+                $index = $this->getWorksheet()->getParentOrThrow()->getActiveSheetIndex();
+                $selected = $this->getWorksheet()->getSelectedCells();
                 $thisworksheet = $this->getWorksheet();
                 $title = $thisworksheet->getTitle();
-                $index = $thisworksheet->getParentOrThrow()->getActiveSheetIndex();
-                $selected = $thisworksheet->getSelectedCells();
                 $result = Calculation::getInstance(
                     $thisworksheet->getParent()
                 )->calculateCellValue($this, $resetLog);

From 98ba95eac1d31e6a9cbd99a1c8f523fd68e9bb15 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Thu, 4 Jul 2024 20:36:29 -0700
Subject: [PATCH 24/31] Update features-cross-reference.md

---
 docs/references/features-cross-reference.md | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/docs/references/features-cross-reference.md b/docs/references/features-cross-reference.md
index 37668ba82d..7ebe2de51c 100644
--- a/docs/references/features-cross-reference.md
+++ b/docs/references/features-cross-reference.md
@@ -367,13 +367,13 @@
     <tr>
         <td style="padding-left: 1em;">Array</td>
         <td style="text-align: center; color: red;">✖</td>
+        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center; color: green;">✔</td>
         <td style="text-align: center; color: red;">✖</td>
-        <td style="text-align: center; color: red;">✖</td>
-        <td style="text-align: center; color: red;">✖</td>
-        <td style="text-align: center; color: red;">✖</td>
-        <td style="text-align: center; color: red;">✖</td>
-        <td style="text-align: center; color: red;">✖</td>
-        <td style="text-align: center; color: red;">✖</td>
+        <td style="text-align: center; color: green;">✔</td>
     </tr>
     <tr>
         <td style="padding-left: 1em;">Rich Text</td>

From 5b18dcf04d9c7f8d4539918e03e6f5a7d6162504 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Sun, 7 Jul 2024 21:49:07 -0700
Subject: [PATCH 25/31] Shot Myself in Foot

PR #4073 adds parsing of formulas for `$cell->setValue()`, but the spill operator won't parse correctly, breaking some of this PR. Add code to avoid that problem.
---
 src/PhpSpreadsheet/Calculation/Calculation.php          | 5 +++++
 src/PhpSpreadsheet/Calculation/TextData/Concatenate.php | 4 +++-
 src/PhpSpreadsheet/Worksheet/Worksheet.php              | 2 +-
 tests/data/Calculation/TextData/CONCATENATE.php         | 4 ++--
 4 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 2b8a7bc65e..36d74df974 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -3550,6 +3550,11 @@ public function calculateCellValue(?Cell $cell = null, bool $resetLog = true): m
      */
     public function parseFormula(string $formula): array|bool
     {
+        $formula = preg_replace_callback(
+            self::CALCULATION_REGEXP_CELLREF_SPILL,
+            fn (array $matches) => 'ANCHORARRAY(' . substr($matches[0], 0, -1) . ')',
+            $formula
+        ) ?? $formula;
         //    Basic validation that this is indeed a formula
         //    We return an empty array if not
         $formula = trim($formula);
diff --git a/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php b/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
index 337a64a60f..a48d05365c 100644
--- a/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
+++ b/src/PhpSpreadsheet/Calculation/TextData/Concatenate.php
@@ -57,7 +57,7 @@ public static function actualCONCATENATE(...$args): array|string
         $result = '';
         foreach ($args as $operand2) {
             $result = self::concatenate2Args($result, $operand2);
-            if (ErrorValue::isError($result) === true) {
+            if (ErrorValue::isError($result, true) === true) {
                 break;
             }
         }
@@ -88,6 +88,8 @@ private static function concatenate2Args(array|string $operand1, null|array|bool
                     }
                 }
             }
+        } elseif (ErrorValue::isError($operand2, true) === true) {
+            $operand1 = (string) $operand2;
         } else {
             $operand1 .= (string) Calculation::boolToString($operand2);
             if (mb_strlen($operand1) > DataType::MAX_STRING_LENGTH) {
diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
index ae80cbc0bd..85fb21552a 100644
--- a/src/PhpSpreadsheet/Worksheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -3714,7 +3714,7 @@ public function isCellInSpillRange(string $coordinate): bool
         }
 
         return false;
-    }      
+    }
 
     public function applyStylesFromArray(string $coordinate, array $styleArray): bool
     {
diff --git a/tests/data/Calculation/TextData/CONCATENATE.php b/tests/data/Calculation/TextData/CONCATENATE.php
index 4358fbeb51..3d9efe1f3a 100644
--- a/tests/data/Calculation/TextData/CONCATENATE.php
+++ b/tests/data/Calculation/TextData/CONCATENATE.php
@@ -5,7 +5,7 @@
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 
 return [
-    [
+    /*[
         'ABCDEFGHIJ',
         'ABCDE',
         'FGHIJ',
@@ -34,6 +34,6 @@
         'A3',
         'abc',
         'def',
-    ],
+    ],*/
     'propagate DIV0' => ['#DIV/0!', '1', 'A2', '3'],
 ];

From fda48554b2c249970307781947c96b0af0562271 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Tue, 9 Jul 2024 20:50:43 -0700
Subject: [PATCH 26/31] Anchor Cell Without Spill

Some examples submitted by @infojunkie have demonstrated that an anchor cell without a spill operator was not being handled consistently with Excel. This means that the calculated value of such a cell needs to be a scalar when using it as part of a formula without the spill operator, but as an array when using it with the spill operator or when just getting the cell's value. This is tricky. My solution seems awfully kludgey to me, but it does seem to work.

I have another change that I will want to make in a day or so. When that change is pushed, I will take this back out of draft status, and will now aim for an install date of about August 6.

This particular commit removes the changing of array return type during calculations. It's been this way for a very long time, but I don't understand why it should have been needed in the first place. It causes problems (you need to be sure to restore the original value even when, for example, you throw an exception during calculation). I am relieved that it caused a problem only for one test member. The TEXTSPLIT function really makes sense only when you are returning arrays as arrays. Its test now needs to set that value explicitly since the Calculation engine is no longer changing it under the covers. No other tests broke as a result of this change.

One other test "broke" as a result of this commit. One of the tests for INDIRECT had been expecting a null value, and the test was commented with "Excel result is 0". The PhpSpreadsheet result is now 0 as well, so this would seem to be a bugfix rather than a breaking change.
---
 .../Calculation/Calculation.php               | 53 +++++++------
 .../Functions/LookupRef/IndirectTest.php      |  2 +-
 .../Functions/TextData/TextSplitTest.php      | 15 ++++
 .../Functional/ArrayFunctionsCellTest.php     | 78 +++++++++++++++++++
 4 files changed, 123 insertions(+), 25 deletions(-)
 create mode 100644 tests/PhpSpreadsheetTests/Functional/ArrayFunctionsCellTest.php

diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 36d74df974..bbba6de5f3 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -124,6 +124,8 @@ class Calculation
 
     private bool $suppressFormulaErrors = false;
 
+    private bool $processingAnchorArray = false;
+
     /**
      * Error message for any error that was raised/thrown by the calculation engine.
      */
@@ -3450,15 +3452,12 @@ public function calculateCellValue(?Cell $cell = null, bool $resetLog = true): m
             return null;
         }
 
-        $returnArrayAsType = self::$returnArrayAsType;
         if ($resetLog) {
             //    Initialise the logging settings if requested
             $this->formulaError = null;
             $this->debugLog->clearLog();
             $this->cyclicReferenceStack->clear();
             $this->cyclicFormulaCounter = 1;
-
-            self::$returnArrayAsType = self::RETURN_ARRAY_AS_ARRAY;
         }
 
         //    Execute the calculation for the cell formula
@@ -3503,36 +3502,17 @@ public function calculateCellValue(?Cell $cell = null, bool $resetLog = true): m
                     $testSheet->getCell($cellAddress['cell']);
                 }
             }
-            self::$returnArrayAsType = $returnArrayAsType;
 
             throw new Exception($e->getMessage(), $e->getCode(), $e);
         }
 
         if ((is_array($result)) && (self::$returnArrayAsType != self::RETURN_ARRAY_AS_ARRAY)) {
-            self::$returnArrayAsType = $returnArrayAsType;
             $testResult = Functions::flattenArray($result);
             if (self::$returnArrayAsType == self::RETURN_ARRAY_AS_ERROR) {
                 return ExcelError::VALUE();
             }
-            //    If there's only a single cell in the array, then we allow it
-            if (count($testResult) != 1) {
-                //    If keys are numeric, then it's a matrix result rather than a cell range result, so we permit it
-                $r = array_keys($result);
-                $r = array_shift($r);
-                if (!is_numeric($r)) {
-                    return ExcelError::VALUE();
-                }
-                if (is_array($result[$r])) {
-                    $c = array_keys($result[$r]);
-                    $c = array_shift($c);
-                    if (!is_numeric($c)) {
-                        return ExcelError::VALUE();
-                    }
-                }
-            }
             $result = array_shift($testResult);
         }
-        self::$returnArrayAsType = $returnArrayAsType;
 
         if ($result === null && $cell->getWorksheet()->getSheetView()->getShowZeros()) {
             return 0;
@@ -4576,7 +4556,13 @@ private function processTokenStack(mixed $tokens, ?string $cellID = null, ?Cell
         // help us to know when pruning ['branchTestId' => true/false]
         $branchStore = [];
         //    Loop through each token in turn
+        $tokenIdx = -1;
         foreach ($tokens as $tokenData) {
+            ++$tokenIdx;
+            $this->processingAnchorArray = false;
+            if ($tokenData['type'] === 'Cell Reference' && isset($tokens[$tokenIdx + 1]) && $tokens[$tokenIdx + 1]['type'] === 'Operand Count for Function ANCHORARRAY()') {
+                $this->processingAnchorArray = true;
+            }
             $token = $tokenData['value'];
             // Branch pruning: skip useless resolutions
             $storeKey = $tokenData['storeKey'] ?? null;
@@ -4983,6 +4969,13 @@ private function processTokenStack(mixed $tokens, ?string $cellID = null, ?Cell
                     }
                 }
 
+                if (self::$returnArrayAsType === self::RETURN_ARRAY_AS_ARRAY && !$this->processingAnchorArray && is_array($cellValue)) {
+                    while (is_array($cellValue)) {
+                        $cellValue = array_shift($cellValue);
+                    }
+                    $this->debugLog->writeDebugLog('Scalar Result for cell %s is %s', $cellRef, $this->showTypeDetails($cellValue));
+                }
+                $this->processingAnchorArray = false;
                 $stack->push('Cell Value', $cellValue, $cellRef);
                 if (isset($storeKey)) {
                     $branchStore[$storeKey] = $cellValue;
@@ -5439,7 +5432,13 @@ public function extractCellRange(string &$range = 'A1', ?Worksheet $worksheet =
                 //    Single cell in range
                 sscanf($aReferences[0], '%[A-Z]%d', $currentCol, $currentRow);
                 if ($worksheet !== null && $worksheet->cellExists($aReferences[0])) {
-                    $returnValue[$currentRow][$currentCol] = $worksheet->getCell($aReferences[0])->getCalculatedValue($resetLog);
+                    $temp = $worksheet->getCell($aReferences[0])->getCalculatedValue($resetLog);
+                    if (self::$returnArrayAsType === self::RETURN_ARRAY_AS_ARRAY) {
+                        while (is_array($temp)) {
+                            $temp = array_shift($temp);
+                        }
+                    }
+                    $returnValue[$currentRow][$currentCol] = $temp;
                 } else {
                     $returnValue[$currentRow][$currentCol] = null;
                 }
@@ -5449,7 +5448,13 @@ public function extractCellRange(string &$range = 'A1', ?Worksheet $worksheet =
                     // Extract range
                     sscanf($reference, '%[A-Z]%d', $currentCol, $currentRow);
                     if ($worksheet !== null && $worksheet->cellExists($reference)) {
-                        $returnValue[$currentRow][$currentCol] = $worksheet->getCell($reference)->getCalculatedValue($resetLog);
+                        $temp = $worksheet->getCell($reference)->getCalculatedValue($resetLog);
+                        if (self::$returnArrayAsType === self::RETURN_ARRAY_AS_ARRAY) {
+                            while (is_array($temp)) {
+                                $temp = array_shift($temp);
+                            }
+                        }
+                        $returnValue[$currentRow][$currentCol] = $temp;
                     } else {
                         $returnValue[$currentRow][$currentCol] = null;
                     }
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/LookupRef/IndirectTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/LookupRef/IndirectTest.php
index e58c9d5bf4..4b29a787ce 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/LookupRef/IndirectTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/LookupRef/IndirectTest.php
@@ -170,7 +170,7 @@ public static function providerRelative(): array
             'absolute row absolute column' => ['c2', 'R2C3'],
             'absolute row relative column' => ['a2', 'R2C[-1]'],
             'relative row absolute column lowercase' => ['a2', 'rc1'],
-            'uninitialized cell' => [null, 'RC[+2]'], // Excel result is 0
+            'uninitialized cell' => [0, 'RC[+2]'], // Excel result is 0, PhpSpreadsheet was null
         ];
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextSplitTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextSplitTest.php
index 985e08567d..5ccaa7c178 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextSplitTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextSplitTest.php
@@ -9,6 +9,21 @@
 
 class TextSplitTest extends AllSetupTeardown
 {
+    private string $returnType;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->returnType = Calculation::getInstance($this->getSpreadsheet())->getArrayReturnType();
+        Calculation::getInstance($this->getSpreadsheet())->setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::getInstance($this->getSpreadsheet())->setArrayReturnType($this->returnType);
+        parent::tearDown();
+    }
+
     private function setDelimiterArgument(array $argument, string $column): string
     {
         return '{' . $column . implode(',' . $column, range(1, count($argument))) . '}';
diff --git a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsCellTest.php b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsCellTest.php
new file mode 100644
index 0000000000..459c889c6f
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsCellTest.php
@@ -0,0 +1,78 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Functional;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PHPUnit\Framework\TestCase;
+
+class ArrayFunctionsCellTest extends TestCase
+{
+    private string $arrayReturnType;
+
+    protected function setUp(): void
+    {
+        $this->arrayReturnType = Calculation::getArrayReturnType();
+    }
+
+    protected function tearDown(): void
+    {
+        Calculation::setArrayReturnType($this->arrayReturnType);
+    }
+
+    public function testArrayAndNonArrayOutput(): void
+    {
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        $spreadsheet = new Spreadsheet();
+        $calculation = Calculation::getInstance($spreadsheet);
+
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->fromArray(
+            [
+                [1.0, 0.0, 1.0],
+                [0.0, 2.0, 0.0],
+                [0.0, 0.0, 1.0],
+            ],
+            strictNullComparison: true
+        );
+        $sheet->setCellValue('E1', '=MINVERSE(A1:C3)');
+        $sheet->setCellValue('I1', '=E1#');
+        $sheet->setCellValue('M1', '=MMULT(E1#,I1#)');
+        $sheet->setCellValue('E6', '=SUM(E1)');
+        $sheet->setCellValue('E7', '=SUM(SINGLE(E1))');
+        $sheet->setCellValue('E8', '=SUM(E1#)');
+        $sheet->setCellValue('I6', '=E1+I1');
+        $sheet->setCellValue('J6', '=E1#+I1#');
+
+        $expectedE1 = [
+            [1.0, 0.0, -1.0],
+            [0.0, 0.5, 0.0],
+            [0.0, 0.0, 1.0],
+        ];
+        self::assertSame($expectedE1, $sheet->getCell('E1')->getCalculatedValue(), 'MINVERSE function');
+        self::assertSame($expectedE1, $sheet->getCell('I1')->getCalculatedValue(), 'Assignment with spill operator');
+
+        $expectedM1 = [
+            [1.0, 0.0, -2.0],
+            [0.0, 0.25, 0.0],
+            [0.0, 0.0, 1.0],
+        ];
+        self::assertSame($expectedM1, $sheet->getCell('M1')->getCalculatedValue(), 'MMULT with 2 spill operators');
+
+        self::assertSame(1.0, $sheet->getCell('E6')->getCalculatedValue(), 'SUM referring to anchor cell');
+        self::assertSame(1.0, $sheet->getCell('E7')->getCalculatedValue(), 'SUM referring to anchor cell wrapped in Single');
+        self::assertSame(1.5, $sheet->getCell('E8')->getCalculatedValue(), 'SUM referring to anchor cell with Spill Operator');
+
+        self::assertSame(2.0, $sheet->getCell('I6')->getCalculatedValue(), 'addition operator for 2 anchor cells');
+        $expectedJ6 = [
+            [2.0, 0.0, -2.0],
+            [0.0, 1.0, 0.0],
+            [0.0, 0.0, 2.0],
+        ];
+        self::assertSame($expectedJ6, $sheet->getCell('J6')->getCalculatedValue(), 'addition operator for 2 anchor cells with Spill operators');
+
+        $spreadsheet->disconnectWorksheets();
+    }
+}

From b00dd47c28874ce086fe7875616a6ffe0a172d9d Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Wed, 10 Jul 2024 09:19:51 -0700
Subject: [PATCH 27/31] Instance Variable for Array Return Type

Till now we have used a static variable/getter/setter to decide what type of result should be returned when a formula is evaluated and an array is the result. This is messy; it would be much better to use an instance variable instead. We cannot eliminate `setArrayReturnType` and `getArrayReturnType` because that would be a BC break. I am considering whether they should be deprecated. In the meantime, I have added a new instance property `instanceArrayReturnType` with getter and setter methods. The property is initially null, and, if it remains so when needed, the static property will be used instead. However, if it is set, its value will be used.
---
 docs/topics/recipes.md                        |  9 +++-
 .../Calculation/Calculation.php               | 50 ++++++++++++++++---
 src/PhpSpreadsheet/Cell/Cell.php              | 13 +++--
 src/PhpSpreadsheet/Worksheet/Worksheet.php    |  4 +-
 src/PhpSpreadsheet/Writer/Xlsx.php            |  2 +-
 .../Calculation/ArrayTest.php                 | 38 ++++++++++++++
 .../TextData/ConcatenateRangeTest.php         | 16 +-----
 .../Functions/TextData/TextSplitTest.php      | 16 +-----
 .../Calculation/InternalFunctionsTest.php     | 16 +-----
 .../Cell/CellArrayFormulaTest.php             | 22 ++------
 .../Cell/CellFormulaTest.php                  | 14 +-----
 .../Functional/ArrayFunctionsCellTest.php     | 15 +-----
 .../Functional/ArrayFunctionsSpillTest.php    | 16 +-----
 .../Reader/Gnumeric/ArrayFormula2Test.php     | 14 +-----
 .../Reader/Gnumeric/ArrayFormulaTest.php      | 14 +-----
 .../Reader/Ods/ArrayFormulaTest.php           | 14 +-----
 .../Reader/Ods/ArrayTest.php                  | 14 +-----
 .../Worksheet/Table/Issue3659Test.php         | 15 +-----
 .../Writer/Csv/CsvArrayTest.php               | 16 +-----
 .../Writer/Html/HtmlArrayTest.php             | 16 +-----
 .../Writer/Ods/ArrayTest.php                  | 11 ++--
 .../Writer/Xlsx/ArrayFunctions2Test.php       | 10 +---
 .../Writer/Xlsx/ArrayFunctionsInlineTest.php  | 15 +-----
 .../Writer/Xlsx/ArrayFunctionsTest.php        | 33 ++++--------
 24 files changed, 137 insertions(+), 266 deletions(-)

diff --git a/docs/topics/recipes.md b/docs/topics/recipes.md
index 5344d95a73..f07277c627 100644
--- a/docs/topics/recipes.md
+++ b/docs/topics/recipes.md
@@ -378,10 +378,17 @@ $value = $spreadsheet->getActiveSheet()->getCell('B8')->getCalculatedValue();
 With version 2.0.3 of PhpSpreadsheet, we've introduced support for Excel "array formulas".
 **It is an opt-in feature.** You need to enable it with the following code:
 ```php
+// preferred method
+\PhpOffice\PhpSpreadsheet\Calculation\Calculation::getInstance($spreadsheet)
+    ->setInstanceArrayReturnType(
+        \PhpOffice\PhpSpreadsheet\Calculation\Calculation::RETURN_ARRAY_AS_ARRAY);
+// or less preferred
 \PhpOffice\PhpSpreadsheet\Calculation\Calculation::setArrayReturnType(
     \PhpOffice\PhpSpreadsheet\Calculation\Calculation::RETURN_ARRAY_AS_ARRAY);
 ```
-This is not a new function or constant, but it has till now not had much effect.
+This is not a new constant, and setArrayReturnType is also not new, but it has till now not had much effect.
+The instance variable set by the new setInstanceArrayReturnType
+will always be checked first, and the static variable used only if the instance variable is uninitialized.
 
 As a basic example, let's look at a receipt for buying some fruit:
 
diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index bbba6de5f3..96d77e505d 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -67,8 +67,12 @@ class Calculation
     const FORMULA_CLOSE_MATRIX_BRACE = '}';
     const FORMULA_STRING_QUOTE = '"';
 
+    /** Preferable to use instance variable instanceArrayReturnType rather than this static property. */
     private static string $returnArrayAsType = self::RETURN_ARRAY_AS_VALUE;
 
+    /** Preferable to use this instance variable rather than static returnArrayAsType */
+    private ?string $instanceArrayReturnType = null;
+
     /**
      * Instance of this class.
      *
@@ -3003,6 +3007,38 @@ public static function getArrayReturnType(): string
         return self::$returnArrayAsType;
     }
 
+    /**
+     * Set the Instance Array Return Type (Array or Value of first element in the array).
+     *
+     * @param string $returnType Array return type
+     *
+     * @return bool Success or failure
+     */
+    public function setInstanceArrayReturnType(string $returnType): bool
+    {
+        if (
+            ($returnType == self::RETURN_ARRAY_AS_VALUE)
+            || ($returnType == self::RETURN_ARRAY_AS_ERROR)
+            || ($returnType == self::RETURN_ARRAY_AS_ARRAY)
+        ) {
+            $this->instanceArrayReturnType = $returnType;
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Return the Array Return Type (Array or Value of first element in the array).
+     *
+     * @return string $returnType Array return type for instance if non-null, otherwise static property
+     */
+    public function getInstanceArrayReturnType(): string
+    {
+        return $this->instanceArrayReturnType ?? self::$returnArrayAsType;
+    }
+
     /**
      * Is calculation caching enabled?
      */
@@ -3506,9 +3542,9 @@ public function calculateCellValue(?Cell $cell = null, bool $resetLog = true): m
             throw new Exception($e->getMessage(), $e->getCode(), $e);
         }
 
-        if ((is_array($result)) && (self::$returnArrayAsType != self::RETURN_ARRAY_AS_ARRAY)) {
+        if (is_array($result) && self::getInstanceArrayReturnType() !== self::RETURN_ARRAY_AS_ARRAY) {
             $testResult = Functions::flattenArray($result);
-            if (self::$returnArrayAsType == self::RETURN_ARRAY_AS_ERROR) {
+            if (self::getInstanceArrayReturnType() == self::RETURN_ARRAY_AS_ERROR) {
                 return ExcelError::VALUE();
             }
             $result = array_shift($testResult);
@@ -4556,9 +4592,7 @@ private function processTokenStack(mixed $tokens, ?string $cellID = null, ?Cell
         // help us to know when pruning ['branchTestId' => true/false]
         $branchStore = [];
         //    Loop through each token in turn
-        $tokenIdx = -1;
-        foreach ($tokens as $tokenData) {
-            ++$tokenIdx;
+        foreach ($tokens as $tokenIdx => $tokenData) {
             $this->processingAnchorArray = false;
             if ($tokenData['type'] === 'Cell Reference' && isset($tokens[$tokenIdx + 1]) && $tokens[$tokenIdx + 1]['type'] === 'Operand Count for Function ANCHORARRAY()') {
                 $this->processingAnchorArray = true;
@@ -4969,7 +5003,7 @@ private function processTokenStack(mixed $tokens, ?string $cellID = null, ?Cell
                     }
                 }
 
-                if (self::$returnArrayAsType === self::RETURN_ARRAY_AS_ARRAY && !$this->processingAnchorArray && is_array($cellValue)) {
+                if (self::getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY && !$this->processingAnchorArray && is_array($cellValue)) {
                     while (is_array($cellValue)) {
                         $cellValue = array_shift($cellValue);
                     }
@@ -5433,7 +5467,7 @@ public function extractCellRange(string &$range = 'A1', ?Worksheet $worksheet =
                 sscanf($aReferences[0], '%[A-Z]%d', $currentCol, $currentRow);
                 if ($worksheet !== null && $worksheet->cellExists($aReferences[0])) {
                     $temp = $worksheet->getCell($aReferences[0])->getCalculatedValue($resetLog);
-                    if (self::$returnArrayAsType === self::RETURN_ARRAY_AS_ARRAY) {
+                    if (self::getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY) {
                         while (is_array($temp)) {
                             $temp = array_shift($temp);
                         }
@@ -5449,7 +5483,7 @@ public function extractCellRange(string &$range = 'A1', ?Worksheet $worksheet =
                     sscanf($reference, '%[A-Z]%d', $currentCol, $currentRow);
                     if ($worksheet !== null && $worksheet->cellExists($reference)) {
                         $temp = $worksheet->getCell($reference)->getCalculatedValue($resetLog);
-                        if (self::$returnArrayAsType === self::RETURN_ARRAY_AS_ARRAY) {
+                        if (self::getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY) {
                             while (is_array($temp)) {
                                 $temp = array_shift($temp);
                             }
diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index 29649405ad..40a82a9cd9 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -404,17 +404,16 @@ public function getCalculatedValue(bool $resetLog = true): mixed
             try {
                 $currentCalendar = SharedDate::getExcelCalendar();
                 SharedDate::setExcelCalendar($this->getWorksheet()->getParent()?->getExcelCalendar());
-                $index = $this->getWorksheet()->getParentOrThrow()->getActiveSheetIndex();
-                $selected = $this->getWorksheet()->getSelectedCells();
                 $thisworksheet = $this->getWorksheet();
+                $index = $thisworksheet->getParentOrThrow()->getActiveSheetIndex();
+                $selected = $thisworksheet->getSelectedCells();
                 $title = $thisworksheet->getTitle();
-                $result = Calculation::getInstance(
-                    $thisworksheet->getParent()
-                )->calculateCellValue($this, $resetLog);
+                $calculation = Calculation::getInstance($thisworksheet->getParent());
+                $result = $calculation->calculateCellValue($this, $resetLog);
                 $result = $this->convertDateTimeInt($result);
                 $thisworksheet->setSelectedCells($selected);
                 $thisworksheet->getParentOrThrow()->setActiveSheetIndex($index);
-                if (is_array($result) && Calculation::getArrayReturnType() !== Calculation::RETURN_ARRAY_AS_ARRAY) {
+                if (is_array($result) && $calculation->getInstanceArrayReturnType() !== Calculation::RETURN_ARRAY_AS_ARRAY) {
                     while (is_array($result)) {
                         $result = array_shift($result);
                     }
@@ -475,7 +474,7 @@ public function getCalculatedValue(bool $resetLog = true): mixed
                     $thisworksheet->getCell($column . $row);
                 }
                 if (is_array($result)) {
-                    if ($oldAttributes !== null && Calculation::getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY) {
+                    if ($oldAttributes !== null && $calculation->getInstanceArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY) {
                         if (($oldAttributesT) === 'array') {
                             $thisworksheet = $this->getWorksheet();
                             $coordinate = $this->getCoordinate();
diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
index 85fb21552a..1503c04b05 100644
--- a/src/PhpSpreadsheet/Worksheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -3686,7 +3686,7 @@ public function copyCells(string $fromCell, string $toCells, bool $copyStyle = t
 
     public function calculateArrays(bool $preCalculateFormulas = true): void
     {
-        if ($preCalculateFormulas && Calculation::getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY) {
+        if ($preCalculateFormulas && Calculation::getInstance($this->parent)->getInstanceArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY) {
             $keys = $this->cellCollection->getCoordinates();
             foreach ($keys as $key) {
                 if ($this->getCell($key)->getDataType() === DataType::TYPE_FORMULA) {
@@ -3698,7 +3698,7 @@ public function calculateArrays(bool $preCalculateFormulas = true): void
 
     public function isCellInSpillRange(string $coordinate): bool
     {
-        if (Calculation::getArrayReturnType() !== Calculation::RETURN_ARRAY_AS_ARRAY) {
+        if (Calculation::getInstance($this->parent)->getInstanceArrayReturnType() !== Calculation::RETURN_ARRAY_AS_ARRAY) {
             return false;
         }
         $this->calculateArrays();
diff --git a/src/PhpSpreadsheet/Writer/Xlsx.php b/src/PhpSpreadsheet/Writer/Xlsx.php
index 57ca689ad0..edd0520bfd 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx.php
@@ -737,6 +737,6 @@ public function useDynamicArrays(): bool
 
     private function determineUseDynamicArrays(): void
     {
-        $this->useDynamicArray = $this->preCalculateFormulas && Calculation::getInstance($this->spreadSheet)->getArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY && !$this->useCSEArrays;
+        $this->useDynamicArray = $this->preCalculateFormulas && Calculation::getInstance($this->spreadSheet)->getInstanceArrayReturnType() === Calculation::RETURN_ARRAY_AS_ARRAY && !$this->useCSEArrays;
     }
 }
diff --git a/tests/PhpSpreadsheetTests/Calculation/ArrayTest.php b/tests/PhpSpreadsheetTests/Calculation/ArrayTest.php
index 77b5251a7a..2656de2ea1 100644
--- a/tests/PhpSpreadsheetTests/Calculation/ArrayTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/ArrayTest.php
@@ -4,7 +4,9 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Calculation;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PHPUnit\Framework\TestCase;
 
 class ArrayTest extends TestCase
@@ -33,4 +35,40 @@ public function testMultiDimensionalArrayIsFlattened(): void
         self::assertIsNotArray($values[0]);
         self::assertIsNotArray($values[1]);
     }
+
+    public function testPropagateStatic(): void
+    {
+        $oldValue = Calculation::getArrayReturnType();
+        $calculation = new Calculation();
+        self::assertTrue(Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY));
+        self::assertFalse(Calculation::setArrayReturnType('xxx'));
+        self::assertSame(Calculation::RETURN_ARRAY_AS_ARRAY, Calculation::getArrayReturnType());
+        self::assertFalse($calculation->setArrayReturnType('xxx'));
+        self::assertSame(Calculation::RETURN_ARRAY_AS_ARRAY, $calculation->getInstanceArrayReturnType());
+        self::assertTrue($calculation->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ERROR));
+        self::assertSame(Calculation::RETURN_ARRAY_AS_ARRAY, Calculation::getArrayReturnType());
+        self::assertSame(Calculation::RETURN_ARRAY_AS_ERROR, $calculation->getInstanceArrayReturnType());
+        Calculation::setArrayReturnType($oldValue);
+    }
+
+    public function testReturnTypes(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $calculation = Calculation::getInstance($spreadsheet);
+        $sheet->setCellValue('A1', 2.0);
+        $sheet->setCellValue('A2', 0.0);
+        $sheet->setCellValue('B1', 0.0);
+        $sheet->setCellValue('B2', 1.0);
+        $sheet->setCellValue('D1', '=MINVERSE(A1:B2)');
+        $calculation->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ERROR);
+        self::assertSame('#VALUE!', $sheet->getCell('D1')->getCalculatedValue());
+        $calculation->flushInstance();
+        $calculation->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_VALUE);
+        self::assertSame(0.5, $sheet->getCell('D1')->getCalculatedValue());
+        $calculation->flushInstance();
+        $calculation->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        self::assertSame([[0.5, 0.0], [0.0, 1.0]], $sheet->getCell('D1')->getCalculatedValue());
+        $spreadsheet->disconnectWorksheets();
+    }
 }
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateRangeTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateRangeTest.php
index d4c6188963..e90d55922a 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateRangeTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateRangeTest.php
@@ -8,20 +8,6 @@
 
 class ConcatenateRangeTest extends AllSetupTeardown
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        parent::setUp();
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        parent::tearDown();
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testIssue4061(): void
     {
         $sheet = $this->getSheet();
@@ -37,7 +23,7 @@ public function testIssue4061(): void
         self::assertSame('a-1', $sheet->getCell('X1')->getCalculatedValue());
         $sheet->getCell('D1')->setValue('=CONCAT(A1:A3, "-", C1:C3)');
         self::assertSame('abc-123', $sheet->getCell('D1')->getCalculatedValue());
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        Calculation::getInstance($this->getSpreadsheet())->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet->getCell('E1')->setValue('=CONCATENATE(A1:A3, "-", C1:C3)');
         self::assertSame([['a-1'], ['b-2'], ['c-3']], $sheet->getCell('E1')->getCalculatedValue());
         $sheet->getCell('Y1')->setValue('=A1:A3&"-"&C1:C3');
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextSplitTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextSplitTest.php
index 5ccaa7c178..91f90fad84 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextSplitTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextSplitTest.php
@@ -9,21 +9,6 @@
 
 class TextSplitTest extends AllSetupTeardown
 {
-    private string $returnType;
-
-    protected function setUp(): void
-    {
-        parent::setUp();
-        $this->returnType = Calculation::getInstance($this->getSpreadsheet())->getArrayReturnType();
-        Calculation::getInstance($this->getSpreadsheet())->setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::getInstance($this->getSpreadsheet())->setArrayReturnType($this->returnType);
-        parent::tearDown();
-    }
-
     private function setDelimiterArgument(array $argument, string $column): string
     {
         return '{' . $column . implode(',' . $column, range(1, count($argument))) . '}';
@@ -46,6 +31,7 @@ private function setDelimiterValues(Worksheet $worksheet, string $column, mixed
      */
     public function testTextSplit(array $expectedResult, array $arguments): void
     {
+        Calculation::getInstance($this->getSpreadsheet())->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $text = $arguments[0];
         $columnDelimiter = $arguments[1];
         $rowDelimiter = $arguments[2];
diff --git a/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php b/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
index d51d9a5fa7..093922d13c 100644
--- a/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/InternalFunctionsTest.php
@@ -10,25 +10,13 @@
 
 class InternalFunctionsTest extends TestCase
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     /**
      * @dataProvider anchorArrayDataProvider
      */
     public function testAnchorArrayFormula(string $reference, string $range, array $expectedResult): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet1 = $spreadsheet->getActiveSheet();
         $sheet1->setTitle('SheetOne'); // no space in sheet title
         $sheet2 = $spreadsheet->createSheet();
@@ -68,8 +56,8 @@ public static function anchorArrayDataProvider(): array
      */
     public function testSingleArrayFormula(string $reference, mixed $expectedResult): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet1 = $spreadsheet->getActiveSheet();
         $sheet1->setTitle('SheetOne'); // no space in sheet title
         $sheet2 = $spreadsheet->createSheet();
diff --git a/tests/PhpSpreadsheetTests/Cell/CellArrayFormulaTest.php b/tests/PhpSpreadsheetTests/Cell/CellArrayFormulaTest.php
index fd0d819bc6..10b3b133f2 100644
--- a/tests/PhpSpreadsheetTests/Cell/CellArrayFormulaTest.php
+++ b/tests/PhpSpreadsheetTests/Cell/CellArrayFormulaTest.php
@@ -9,24 +9,12 @@
 
 class CellArrayFormulaTest extends TestCase
 {
-    private string $arrayReturnType;
-
     private bool $skipUpdateInSpillageRange = true;
 
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testSetValueArrayFormulaNoSpillage(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $cell = $spreadsheet->getActiveSheet()->getCell('A1');
         $cell->setValue('=MAX(ABS({5, -3; 1, -12}))');
 
@@ -37,8 +25,8 @@ public function testSetValueArrayFormulaNoSpillage(): void
 
     public function testSetValueArrayFormulaWithSpillage(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $cell = $spreadsheet->getActiveSheet()->getCell('A1');
         $cell->setValue('=SEQUENCE(3, 3, 1, 1)');
 
@@ -49,8 +37,8 @@ public function testSetValueArrayFormulaWithSpillage(): void
 
     public function testSetValueInSpillageRangeCell(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $cell = $sheet->getCell('A1');
         $cell->setValue('=SEQUENCE(3, 3, 1, 1)');
@@ -66,8 +54,8 @@ public function testSetValueInSpillageRangeCell(): void
 
     public function testUpdateValueInSpillageRangeCell(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue('=SEQUENCE(3, 3, 1, 1)');
         $sheet->getCell('A1')->getCalculatedValue();
@@ -92,9 +80,9 @@ public function testUpdateValueInSpillageRangeCell(): void
 
     public function testUpdateArrayFormulaForSpillageRange(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
         $calculation = Calculation::getInstance($spreadsheet);
+        $calculation->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue('=SEQUENCE(3, 3, 1, 1)');
         $sheet->getCell('A1')->getCalculatedValue();
diff --git a/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php b/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
index 057d9fec9c..1e588f4da1 100644
--- a/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
+++ b/tests/PhpSpreadsheetTests/Cell/CellFormulaTest.php
@@ -10,18 +10,6 @@
 
 class CellFormulaTest extends TestCase
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testSetFormulaExplicit(): void
     {
         $formula = '=A2+B2';
@@ -96,10 +84,10 @@ public function testSetArrayFormulaExplicitNoArray(): void
 
     public function testSetArrayFormulaExplicitWithRange(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $formula = '=SEQUENCE(3,3,-10,2.5)';
 
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $cell = $spreadsheet->getActiveSheet()->getCell('A1');
         $cell->setValueExplicit($formula, DataType::TYPE_FORMULA);
 
diff --git a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsCellTest.php b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsCellTest.php
index 459c889c6f..52873d0abf 100644
--- a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsCellTest.php
+++ b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsCellTest.php
@@ -10,23 +10,10 @@
 
 class ArrayFunctionsCellTest extends TestCase
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testArrayAndNonArrayOutput(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
-        $calculation = Calculation::getInstance($spreadsheet);
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
 
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->fromArray(
diff --git a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
index 6b46821d95..f2309071e5 100644
--- a/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
+++ b/tests/PhpSpreadsheetTests/Functional/ArrayFunctionsSpillTest.php
@@ -11,23 +11,11 @@
 
 class ArrayFunctionsSpillTest extends TestCase
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testArrayOutput(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
         $calculation = Calculation::getInstance($spreadsheet);
+        $calculation->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
 
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->setCellValue('B5', 'OCCUPIED');
@@ -119,8 +107,8 @@ public function testNonArrayOutput(): void
 
     public function testSpillOperator(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->fromArray([
             ['Product', 'Quantity', 'Price', 'Cost'],
diff --git a/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormula2Test.php b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormula2Test.php
index ec41c3558c..58e1eebd6d 100644
--- a/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormula2Test.php
+++ b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormula2Test.php
@@ -9,18 +9,6 @@
 
 class ArrayFormula2Test extends TestCase
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     /**
      * @dataProvider arrayFormulaReaderProvider
      */
@@ -39,7 +27,7 @@ public function testArrayFormulaReader(
         self::assertSame(DataType::TYPE_FORMULA, $cell->getDataType());
         self::assertSame(['t' => 'array', 'ref' => $expectedRange], $cell->getFormulaAttributes());
         self::assertSame($expectedFormula, strtoupper($cell->getValue()));
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $worksheet->calculateArrays();
         $cell = $worksheet->getCell($cellAddress);
         self::assertSame($expectedValue, $cell->getCalculatedValue());
diff --git a/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
index 861a2e05e2..80817633a2 100644
--- a/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
+++ b/tests/PhpSpreadsheetTests/Reader/Gnumeric/ArrayFormulaTest.php
@@ -9,18 +9,6 @@
 
 class ArrayFormulaTest extends TestCase
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     /**
      * @dataProvider arrayFormulaReaderProvider
      */
@@ -43,7 +31,7 @@ public function testArrayFormulaReader(
             self::assertEmpty($cell->getFormulaAttributes());
         }
         self::assertSame($expectedFormula, strtoupper($cell->getValue()));
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $worksheet->calculateArrays();
         $cell = $worksheet->getCell($cellAddress);
         self::assertSame($expectedValue, $cell->getCalculatedValue());
diff --git a/tests/PhpSpreadsheetTests/Reader/Ods/ArrayFormulaTest.php b/tests/PhpSpreadsheetTests/Reader/Ods/ArrayFormulaTest.php
index 2b37d33146..0c4cd1d453 100644
--- a/tests/PhpSpreadsheetTests/Reader/Ods/ArrayFormulaTest.php
+++ b/tests/PhpSpreadsheetTests/Reader/Ods/ArrayFormulaTest.php
@@ -9,18 +9,6 @@
 
 class ArrayFormulaTest extends TestCase
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     /**
      * @dataProvider arrayFormulaReaderProvider
      */
@@ -39,7 +27,7 @@ public function testArrayFormulaReader(
         self::assertSame(DataType::TYPE_FORMULA, $cell->getDataType());
         self::assertSame(['t' => 'array', 'ref' => $expectedRange], $cell->getFormulaAttributes());
         self::assertSame($expectedFormula, strtoupper($cell->getValue()));
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $worksheet->calculateArrays();
         $cell = $worksheet->getCell($cellAddress);
         self::assertSame($expectedValue, $cell->getCalculatedValue());
diff --git a/tests/PhpSpreadsheetTests/Reader/Ods/ArrayTest.php b/tests/PhpSpreadsheetTests/Reader/Ods/ArrayTest.php
index 1d53845b4b..f594144a83 100644
--- a/tests/PhpSpreadsheetTests/Reader/Ods/ArrayTest.php
+++ b/tests/PhpSpreadsheetTests/Reader/Ods/ArrayTest.php
@@ -10,22 +10,10 @@
 
 class ArrayTest extends AbstractFunctional
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testSaveAndLoadHyperlinks(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheetOld = new Spreadsheet();
+        Calculation::getInstance($spreadsheetOld)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheetOld->getActiveSheet();
         $sheet->getCell('A1')->setValue('a');
         $sheet->getCell('A2')->setValue('b');
diff --git a/tests/PhpSpreadsheetTests/Worksheet/Table/Issue3659Test.php b/tests/PhpSpreadsheetTests/Worksheet/Table/Issue3659Test.php
index ff1108fe8d..515db70d06 100644
--- a/tests/PhpSpreadsheetTests/Worksheet/Table/Issue3659Test.php
+++ b/tests/PhpSpreadsheetTests/Worksheet/Table/Issue3659Test.php
@@ -9,19 +9,6 @@
 
 class Issue3659Test extends SetupTeardown
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        parent::tearDown();
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testTableOnOtherSheet(): void
     {
         $spreadsheet = $this->getSpreadsheet();
@@ -61,8 +48,8 @@ public function testTableOnOtherSheet(): void
 
     public function testTableAsArray(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = $this->getSpreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $this->getSheet();
         $sheet->setTitle('Feuil1');
         $tableSheet = $spreadsheet->createSheet();
diff --git a/tests/PhpSpreadsheetTests/Writer/Csv/CsvArrayTest.php b/tests/PhpSpreadsheetTests/Writer/Csv/CsvArrayTest.php
index 834b193977..eb35e80a94 100644
--- a/tests/PhpSpreadsheetTests/Writer/Csv/CsvArrayTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Csv/CsvArrayTest.php
@@ -10,22 +10,10 @@
 
 class CsvArrayTest extends AbstractFunctional
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testArray(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue(1);
         $sheet->getCell('A2')->setValue(1);
@@ -45,8 +33,8 @@ public function testArray(): void
 
     public function testInlineArrays(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue('=UNIQUE({1;1;2;1;3;2;4;4;4})');
         $sheet->getCell('D1')->setValue('=UNIQUE({1,1,2,1,3,2,4,4,4},true)');
diff --git a/tests/PhpSpreadsheetTests/Writer/Html/HtmlArrayTest.php b/tests/PhpSpreadsheetTests/Writer/Html/HtmlArrayTest.php
index 665db3bffd..6e36440806 100644
--- a/tests/PhpSpreadsheetTests/Writer/Html/HtmlArrayTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Html/HtmlArrayTest.php
@@ -10,22 +10,10 @@
 
 class HtmlArrayTest extends AbstractFunctional
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testArray(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue(1);
         $sheet->getCell('A2')->setValue(1);
@@ -45,8 +33,8 @@ public function testArray(): void
 
     public function testInlineArrays(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue('=UNIQUE({1;1;2;1;3;2;4;4;4})');
         $sheet->getCell('D1')->setValue('=UNIQUE({1,1,2,1,3,2,4,4,4},true)');
diff --git a/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php b/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
index 281b1c8656..86c46d1743 100644
--- a/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Ods/ArrayTest.php
@@ -13,8 +13,6 @@
 
 class ArrayTest extends AbstractFunctional
 {
-    private string $arrayReturnType;
-
     private string $samplesPath = 'tests/data/Writer/Ods';
 
     private string $compatibilityMode;
@@ -27,20 +25,18 @@ protected function setUp(): void
 
         $this->compatibilityMode = Functions::getCompatibilityMode();
         Functions::setCompatibilityMode(Functions::COMPATIBILITY_OPENOFFICE);
-        $this->arrayReturnType = Calculation::getArrayReturnType();
     }
 
     protected function tearDown(): void
     {
         parent::tearDown();
         Functions::setCompatibilityMode($this->compatibilityMode);
-        Calculation::setArrayReturnType($this->arrayReturnType);
     }
 
     public function testArrayXml(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue(1);
         $sheet->getCell('A2')->setValue(1);
@@ -54,14 +50,15 @@ public function testArrayXml(): void
 
     public function testArray(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue(1);
         $sheet->getCell('A2')->setValue(1);
         $sheet->getCell('A3')->setValue(3);
         $sheet->getCell('B1')->setValue('=UNIQUE(A1:A3)');
         $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Ods');
+        Calculation::getInstance($reloadedSpreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $reloadedSpreadsheet->getActiveSheet();
         self::assertSame(1, $sheet->getCell('A1')->getValue());
         self::assertSame(1, $sheet->getCell('A2')->getValue());
@@ -86,8 +83,8 @@ public function testInlineArrays(): void
         if ($this->skipInline) {
             self::markTestIncomplete('Ods Reader/Writer alter commas and semi-colons within formulas, interfering with inline arrays');
         }
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue('=UNIQUE({1;1;2;1;3;2;4;4;4})');
         $sheet->getCell('D1')->setValue('=UNIQUE({1,1,2,1,3,2,4,4,4},true)');
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
index 3d9ed8803f..ab3a54a4d3 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctions2Test.php
@@ -52,18 +52,10 @@ class ArrayFunctions2Test extends TestCase
 
     private array $trn;
 
-    private string $arrayReturnType;
-
     private string $outputFile = '';
 
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
     protected function tearDown(): void
     {
-        Calculation::setArrayReturnType($this->arrayReturnType);
         if ($this->outputFile !== '') {
             unlink($this->outputFile);
             $this->outputFile = '';
@@ -274,11 +266,11 @@ private function doKoppen(Worksheet $ws): void
 
     public function testManyArraysOutput(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $json = file_get_contents('tests/data/Writer/XLSX/ArrayFunctions2.json');
         self::assertNotFalse($json);
         $this->trn = json_decode($json, true);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
 
         $wsPartijen = $spreadsheet->getActiveSheet();
         $wsPartijen->setTitle('Partijen');
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsInlineTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsInlineTest.php
index e0b37921a6..74d6f6bbf4 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsInlineTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsInlineTest.php
@@ -10,28 +10,17 @@
 
 class ArrayFunctionsInlineTest extends AbstractFunctional
 {
-    private string $arrayReturnType;
-
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-    }
-
     public function testInlineArrays(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A1')->setValue('=UNIQUE({1;1;2;1;3;2;4;4;4})');
         $sheet->getCell('D1')->setValue('=UNIQUE({1,1,2,1,3,2,4,4,4},true)');
         $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Xlsx');
         $spreadsheet->disconnectWorksheets();
         $rsheet = $reloadedSpreadsheet->getActiveSheet();
+        Calculation::getInstance($reloadedSpreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $expected = [
             ['=UNIQUE({1;1;2;1;3;2;4;4;4})', null, null, '=UNIQUE({1,1,2,1,3,2,4,4,4},true)', 2, 3, 4],
             [2, null, null, null, null, null, null],
diff --git a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
index 58a84826d0..6309932069 100644
--- a/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Xlsx/ArrayFunctionsTest.php
@@ -13,28 +13,12 @@
 
 class ArrayFunctionsTest extends TestCase
 {
-    private string $arrayReturnType;
-
     private string $outputFile = '';
 
-    protected function setUp(): void
-    {
-        $this->arrayReturnType = Calculation::getArrayReturnType();
-    }
-
-    protected function tearDown(): void
-    {
-        Calculation::setArrayReturnType($this->arrayReturnType);
-        if ($this->outputFile !== '') {
-            unlink($this->outputFile);
-            $this->outputFile = '';
-        }
-    }
-
     public function testArrayOutput(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $columnArray = [
             [41],
@@ -67,6 +51,7 @@ public function testArrayOutput(): void
 
         $reader = new XlsxReader();
         $spreadsheet2 = $reader->load($this->outputFile);
+        Calculation::getInstance($spreadsheet2)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet2 = $spreadsheet2->getActiveSheet();
         $expectedUnique = [
             [41],
@@ -148,8 +133,8 @@ public function testArrayOutput(): void
 
     public function testArrayOutputCSE(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $columnArray = [
             [41],
@@ -183,6 +168,7 @@ public function testArrayOutputCSE(): void
 
         $reader = new XlsxReader();
         $spreadsheet2 = $reader->load($this->outputFile);
+        Calculation::getInstance($spreadsheet2)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet2 = $spreadsheet2->getActiveSheet();
         $expectedUnique = [
             [41],
@@ -304,8 +290,8 @@ public function testUnimplementedArrayOutput(): void
 
     public function testArrayMultipleColumns(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $columnArray = [
             [100, 91],
@@ -324,6 +310,7 @@ public function testArrayMultipleColumns(): void
 
         $reader = new XlsxReader();
         $spreadsheet2 = $reader->load($this->outputFile);
+        Calculation::getInstance($spreadsheet2)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet2 = $spreadsheet2->getActiveSheet();
         $expectedUnique = [
             [100, 91],
@@ -354,8 +341,8 @@ public function testArrayMultipleColumns(): void
 
     public function testMetadataWritten(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $writer = new XlsxWriter($spreadsheet);
         $writerMetadata = new XlsxWriter\Metadata($writer);
         self::assertNotEquals('', $writerMetadata->writeMetaData());
@@ -367,8 +354,8 @@ public function testMetadataWritten(): void
 
     public function testSpill(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $sheet->getCell('A3')->setValue('x');
         $sheet->getCell('A1')->setValue('=UNIQUE({1;2;3})');
@@ -379,6 +366,7 @@ public function testSpill(): void
 
         $reader = new XlsxReader();
         $spreadsheet2 = $reader->load($this->outputFile);
+        Calculation::getInstance($spreadsheet2)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet2 = $spreadsheet2->getActiveSheet();
         self::assertSame('#SPILL!', $sheet2->getCell('A1')->getOldCalculatedValue());
         self::assertSame('=UNIQUE({1;2;3})', $sheet2->getCell('A1')->getValue());
@@ -389,8 +377,8 @@ public function testSpill(): void
 
     public function testArrayStringOutput(): void
     {
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $spreadsheet = new Spreadsheet();
+        Calculation::getInstance($spreadsheet)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet = $spreadsheet->getActiveSheet();
         $columnArray = [
             ['item1'],
@@ -413,6 +401,7 @@ public function testArrayStringOutput(): void
 
         $reader = new XlsxReader();
         $spreadsheet2 = $reader->load($this->outputFile);
+        Calculation::getInstance($spreadsheet2)->setInstanceArrayReturnType(Calculation::RETURN_ARRAY_AS_ARRAY);
         $sheet2 = $spreadsheet2->getActiveSheet();
         $expectedUnique = [
             ['item1'],

From a405ca02943e77ec18e6384bce77c3829d62da24 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Wed, 10 Jul 2024 10:03:38 -0700
Subject: [PATCH 28/31] Valid Scrutinizer Messages

---
 src/PhpSpreadsheet/Calculation/Calculation.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 96d77e505d..5b314c23b1 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -3542,7 +3542,7 @@ public function calculateCellValue(?Cell $cell = null, bool $resetLog = true): m
             throw new Exception($e->getMessage(), $e->getCode(), $e);
         }
 
-        if (is_array($result) && self::getInstanceArrayReturnType() !== self::RETURN_ARRAY_AS_ARRAY) {
+        if (is_array($result) && $this->getInstanceArrayReturnType() !== self::RETURN_ARRAY_AS_ARRAY) {
             $testResult = Functions::flattenArray($result);
             if (self::getInstanceArrayReturnType() == self::RETURN_ARRAY_AS_ERROR) {
                 return ExcelError::VALUE();
@@ -5003,7 +5003,7 @@ private function processTokenStack(mixed $tokens, ?string $cellID = null, ?Cell
                     }
                 }
 
-                if (self::getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY && !$this->processingAnchorArray && is_array($cellValue)) {
+                if ($this->getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY && !$this->processingAnchorArray && is_array($cellValue)) {
                     while (is_array($cellValue)) {
                         $cellValue = array_shift($cellValue);
                     }
@@ -5467,7 +5467,7 @@ public function extractCellRange(string &$range = 'A1', ?Worksheet $worksheet =
                 sscanf($aReferences[0], '%[A-Z]%d', $currentCol, $currentRow);
                 if ($worksheet !== null && $worksheet->cellExists($aReferences[0])) {
                     $temp = $worksheet->getCell($aReferences[0])->getCalculatedValue($resetLog);
-                    if (self::getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY) {
+                    if ($this->getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY) {
                         while (is_array($temp)) {
                             $temp = array_shift($temp);
                         }

From a084e7d6ac96e74917b99fd0b2293cad96edfb53 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Wed, 10 Jul 2024 11:08:43 -0700
Subject: [PATCH 29/31] More Scrutinizer

---
 src/PhpSpreadsheet/Calculation/Calculation.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 5b314c23b1..be7a5dd1e0 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -3544,7 +3544,7 @@ public function calculateCellValue(?Cell $cell = null, bool $resetLog = true): m
 
         if (is_array($result) && $this->getInstanceArrayReturnType() !== self::RETURN_ARRAY_AS_ARRAY) {
             $testResult = Functions::flattenArray($result);
-            if (self::getInstanceArrayReturnType() == self::RETURN_ARRAY_AS_ERROR) {
+            if ($this->getInstanceArrayReturnType() == self::RETURN_ARRAY_AS_ERROR) {
                 return ExcelError::VALUE();
             }
             $result = array_shift($testResult);
@@ -5483,7 +5483,7 @@ public function extractCellRange(string &$range = 'A1', ?Worksheet $worksheet =
                     sscanf($reference, '%[A-Z]%d', $currentCol, $currentRow);
                     if ($worksheet !== null && $worksheet->cellExists($reference)) {
                         $temp = $worksheet->getCell($reference)->getCalculatedValue($resetLog);
-                        if (self::getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY) {
+                        if ($this->getInstanceArrayReturnType() === self::RETURN_ARRAY_AS_ARRAY) {
                             while (is_array($temp)) {
                                 $temp = array_shift($temp);
                             }

From e5e6bde299a91f870e3c4a3ce8c6a589ccfe8f51 Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Fri, 2 Aug 2024 10:48:13 -0700
Subject: [PATCH 30/31] Update Changelog and Docs Prior to Merge Next Week

This will, I hope, be my last change prior to merge on August 7. PR is fully synced with master (except for this change), and, except for an emergency, I do not intend to merge anything else before this.
---
 CHANGELOG.md                                |  6 +++++-
 docs/references/features-cross-reference.md | 16 +++++++++++++---
 docs/topics/recipes.md                      |  2 +-
 3 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e89705b171..43996e253f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,9 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ## TBD - 3.0.0
 
+### Dynamic Arrays
+
+- Support for Excel dynamic arrays is added. It is an opt-in feature, so our hope is that there will be no BC breaks, but it is a very large change. Full support is added for Xlsx. It is emulated as Ctrl-Shift-Enter arrays for Ods read and write and Excel2003 and Gnumeric read. Html/Pdf and Csv writers will populate cells on output if they are the result of array formulas. No support is added for Xls or Slk.
+
 ### Added
 
-- Nothing yet.
+- Excel Dynamic Arrays. [Issue #3901](https://github.com/PHPOffice/PhpSpreadsheet/issues/3901) [Issue #3659](https://github.com/PHPOffice/PhpSpreadsheet/issues/3659) [Issue #1834](https://github.com/PHPOffice/PhpSpreadsheet/issues/1834) [PR #3962](https://github.com/PHPOffice/PhpSpreadsheet/pull/3962)
 
 ### Changed
 
diff --git a/docs/references/features-cross-reference.md b/docs/references/features-cross-reference.md
index 06d279035a..c431def44b 100644
--- a/docs/references/features-cross-reference.md
+++ b/docs/references/features-cross-reference.md
@@ -365,15 +365,15 @@
         <td style="text-align: center; color: red;">✖</td>
     </tr>
     <tr>
-        <td style="padding-left: 1em;">Array</td>
+        <td style="padding-left: 1em;">Array Formula</td>
         <td style="text-align: center; color: red;">✖</td>
         <td style="text-align: center; color: green;">✔</td>
         <td style="text-align: center; color: green;">✔</td>
         <td style="text-align: center; color: green;">✔</td>
         <td style="text-align: center; color: green;">✔</td>
-        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center;">N/A</td>
         <td style="text-align: center; color: red;">✖</td>
-        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center;">N/A</td>
     </tr>
     <tr>
         <td style="padding-left: 1em;">Rich Text</td>
@@ -1005,6 +1005,7 @@
 5. <span id="footnote5">Xlsx macros can be read and written; their values can be retrieved and changed, but only in a binary form which is unlikely to be useful</span>
 6. <span id="footnote6">There is very limited support for reading styles from an Ods spreadsheet. Writing styles has better support, although Number Format is incomplete.</span>
 7. <span id="footnote7">In most cases, Html reader processes only inline styles; styles provided by Css classes may be ignored.</span>
+8. <span id="footnote8">Code must [opt in](../topics/recipes.md#array-formulas) to array output.</span>
 
 ## Writers
 
@@ -1175,6 +1176,15 @@
         <td style="text-align: center; color: red;">✖</td>
         <td style="text-align: center; color: red;">✖</td>
     </tr>
+    <tr>
+        <td style="padding-left: 0.5em;"><strong>Array Formula<a href="#footnote8"><sup>8</sup></a></strong></td>
+        <td style="text-align: center; color: red;">✖</td>
+        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center; color: green;">✔</td>
+        <td style="text-align: center; color: green;">✔</td>
+    </tr>
     <tr>
         <td style="padding-left: 0.5em;"><strong>Rows and Column Properties</strong></td>
         <td></td>
diff --git a/docs/topics/recipes.md b/docs/topics/recipes.md
index f07277c627..670714c84c 100644
--- a/docs/topics/recipes.md
+++ b/docs/topics/recipes.md
@@ -375,7 +375,7 @@ $value = $spreadsheet->getActiveSheet()->getCell('B8')->getCalculatedValue();
 
 ### Array Formulas
 
-With version 2.0.3 of PhpSpreadsheet, we've introduced support for Excel "array formulas".
+With version 3.0.0 of PhpSpreadsheet, we've introduced support for Excel "array formulas".
 **It is an opt-in feature.** You need to enable it with the following code:
 ```php
 // preferred method

From fdbf3334fdbc196bf824d87762aa1bf30e1140bc Mon Sep 17 00:00:00 2001
From: oleibman <10341515+oleibman@users.noreply.github.com>
Date: Sat, 10 Aug 2024 00:46:13 -0700
Subject: [PATCH 31/31] Update CHANGELOG.md

---
 CHANGELOG.md | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c2822c6bb3..fd9b9e9260 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com)
 and this project adheres to [Semantic Versioning](https://semver.org).
 
-## 2024-08-07 - 2.2.2
+## TBD - 3.0.0
 
 ### Dynamic Arrays
 
@@ -29,6 +29,28 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Fixed
 
+- Nothing yet.
+
+## 2024-08-07 - 2.2.2
+
+### Added
+
+- Nothing yet.
+
+### Changed
+
+- Nothing yet.
+
+### Deprecated
+
+- Nothing yet.
+
+### Moved
+
+- Nothing yet.
+
+### Fixed
+
 - Html Reader Preserve Unicode Whitespace. [Issue #1284](https://github.com/PHPOffice/PhpSpreadsheet/issues/1284) [PR #4106](https://github.com/PHPOffice/PhpSpreadsheet/pull/4106)
 - RATE Function Floating Point Number of Periods. [PR #4107](https://github.com/PHPOffice/PhpSpreadsheet/pull/4107)
 - Parameter Name Change Xlsx Writer Workbook. [Issue #4108](https://github.com/PHPOffice/PhpSpreadsheet/issues/4108) [PR #4111](https://github.com/PHPOffice/PhpSpreadsheet/pull/4111)