3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = [null, '2026-03-23', '1970-01-01']; asort($x); var_export($x);
Output for 7.3.33, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 0 => NULL, 2 => '1970-01-01', 1 => '2026-03-23', )
preferences:
49.53 ms | 712 KiB | 4 Q