From 165acb9a12ffc78d6ddd5df4b40c7238ca66aedc Mon Sep 17 00:00:00 2001
From: saifulislamferoz <saif012@gmail.com>
Date: Sat, 28 Jun 2025 16:37:32 +0600
Subject: [PATCH 1/3] fix: data loss for numeric value greater than excel
 supported max value

---
 src/PhpSpreadsheet/Cell/DefaultValueBinder.php | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/PhpSpreadsheet/Cell/DefaultValueBinder.php b/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
index 10c5c93c59..589caab87a 100644
--- a/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
+++ b/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
@@ -12,6 +12,8 @@
 
 class DefaultValueBinder implements IValueBinder
 {
+    const EXCEL_MAX_INT = 9007199254740992; // 2^53, max safe integer in JavaScript
+
     /**
      * Bind value to a cell.
      *
@@ -28,9 +30,9 @@ public function bindValue(Cell $cell, mixed $value): bool
         } elseif ($value instanceof DateTimeInterface) {
             $value = $value->format('Y-m-d H:i:s');
         } elseif ($value instanceof Stringable) {
-            $value = (string) $value;
+            $value = (string)$value;
         } else {
-            throw new SpreadsheetException('Unable to bind unstringable ' . gettype($value));
+            throw new SpreadsheetException('Unable to bind unstringable '.gettype($value));
         }
 
         // Set value explicit
@@ -62,7 +64,7 @@ public static function dataTypeForValue(mixed $value): string
             return DataType::TYPE_INLINE;
         }
         if ($value instanceof Stringable) {
-            $value = (string) $value;
+            $value = (string)$value;
         }
         if (!is_string($value)) {
             $gettype = is_object($value) ? get_class($value) : gettype($value);
@@ -93,7 +95,7 @@ public static function dataTypeForValue(mixed $value): string
             $tValue = ltrim($value, '+-');
             if (strlen($tValue) > 1 && $tValue[0] === '0' && $tValue[1] !== '.') {
                 return DataType::TYPE_STRING;
-            } elseif ((!str_contains($value, '.')) && ($value > PHP_INT_MAX)) {
+            } elseif ((!str_contains($value, '.')) && ($value > self::EXCEL_MAX_INT)) {
                 return DataType::TYPE_STRING;
             } elseif (!is_numeric($value)) {
                 return DataType::TYPE_STRING;

From 35b40c8cbe94ed8b31bb6f0700dd7d67eefbcf0f Mon Sep 17 00:00:00 2001
From: saifulislamferoz <saif012@gmail.com>
Date: Sat, 28 Jun 2025 16:47:19 +0600
Subject: [PATCH 2/3] fix: phpcs violation for space

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

diff --git a/src/PhpSpreadsheet/Cell/DefaultValueBinder.php b/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
index 589caab87a..c5ebfb17b6 100644
--- a/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
+++ b/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
@@ -30,9 +30,9 @@ public function bindValue(Cell $cell, mixed $value): bool
         } elseif ($value instanceof DateTimeInterface) {
             $value = $value->format('Y-m-d H:i:s');
         } elseif ($value instanceof Stringable) {
-            $value = (string)$value;
+            $value = (string) $value;
         } else {
-            throw new SpreadsheetException('Unable to bind unstringable '.gettype($value));
+            throw new SpreadsheetException('Unable to bind unstringable ' . gettype($value));
         }
 
         // Set value explicit

From 153bbbcc49ee0ebd715c29b3d301c58128ea7307 Mon Sep 17 00:00:00 2001
From: saifulislamferoz <saif012@gmail.com>
Date: Sat, 28 Jun 2025 16:49:22 +0600
Subject: [PATCH 3/3] fix: phpcs violation for space

---
 src/PhpSpreadsheet/Cell/DefaultValueBinder.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/PhpSpreadsheet/Cell/DefaultValueBinder.php b/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
index c5ebfb17b6..0868576cae 100644
--- a/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
+++ b/src/PhpSpreadsheet/Cell/DefaultValueBinder.php
@@ -64,7 +64,7 @@ public static function dataTypeForValue(mixed $value): string
             return DataType::TYPE_INLINE;
         }
         if ($value instanceof Stringable) {
-            $value = (string)$value;
+            $value = (string) $value;
         }
         if (!is_string($value)) {
             $gettype = is_object($value) ? get_class($value) : gettype($value);