[php-src] Issue #13279: Undefined Array Key with a Key as a Long String

Issue: https://github.com/php/php-src/issues/13279 Author: designextreme ### Description The following code: ```php <?php class array_test { public $array = array(); public function __construct() { $this->array = array( '1696007099_5_d386ca263816163166823ef00979d944' => array( 'order' => 1 ), '1663066269_5_8c82ae69264d73f7ae7ce3a619501231' => array( 'order' => 0 ) ); uksort($this->array, function ($a, $b) { return $this->array[$a]['order'] - $this->array[$b]['order']; } ); } } new array_test; ``` Resulted in this output: ``` Warning: Undefined array key "1696007099_5_d386ca263816163166823ef00979d944" in .../array_test.php on line 19 ``` But I expected this output instead: No warnings/errors, just a freshly sorted array. I have tested the following: ``` echo $a; // 1696007099_5_d386ca263816163166823ef00979d944 echo $b; // 1663066269_5_8c82ae69264d73f7ae7ce3a619501231 echo array_key_exists($a, $this->array); // FALSE echo isset($this->array[$a]); // FALSE echo array_key_first($this->array); // 1696007099_5_d386ca263816163166823ef00979d944 echo array_keys($this->array)[0]; // 1696007099_5_d386ca263816163166823ef00979d944 ``` ### PHP Version PHP 8.3 ### Operating System CentOS 7.9