Deal With Scientific Notation

Author: oleibman

src/PhpSpreadsheet/Calculation/MathTrig/Trunc.php

@@ -51,7 +51,8 @@ public static function evaluate(array|float|string|null $value = 0, array|int|st
 
             return ($minusSign === '') ? $result : -$result;
         }
-        $resultString = (string) $value;
+        $decimals = PHP_FLOAT_DIG - strlen((string) (int) $value);
+        $resultString = sprintf('%.' . $decimals . 'f', $value);
         $regExp = '/([.]\\d{' . $digits . '})\\d+$/';
         $result = $minusSign . (preg_replace($regExp, '$1', $resultString) ?? $resultString);
 

tests/data/Calculation/MathTrig/TRUNC.php

@@ -45,4 +45,10 @@
     'issue4113 example 3 positive' => [43747, '43747.99122596, 0'],
     'issue4113 example 4' => [-9.11, '-9.1196419, 2'],
     'issue4113 example 5' => [-42300.65, '-42300.65099338, 3'],
+    'issue4113 example 6 variant 1' => [0.000012, '0.0000123, 6'],
+    'issue4113 example 6 variant 2' => [0.0000123, '0.0000123, 8'],
+    'issue4113 example 6 variant 3' => [-0.000012, '-0.0000123, 6'],
+    'issue4113 example 6 variant 4' => [-0.0000123, '-0.0000123, 8'],
+    'issue4113 example 6 variant 5' => [0.000012, '1.23E-5, 6'],
+    'issue4113 example 6 variant 6' => [-0.0000123, '-1.23E-5, 8'],
 ];