3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( '13-' => 'z', '14-' => 'b', '6-' => 'a', '5' => 'a' ); ksort($array); print_r($array);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [13-] => z [14-] => b [5] => a [6-] => a )
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Array ( [5] => a [13-] => z [14-] => b [6-] => a )
preferences:
238.83 ms | 405 KiB | 355 Q