3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [1,2,3,4,5,6,1,2,3,4,5,6]; $f = function($a,$b) { return $a < $b ? 1 : -1; }; uasort($a, $f); print_r($a);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [5] => 6 [11] => 6 [4] => 5 [10] => 5 [3] => 4 [9] => 4 [2] => 3 [8] => 3 [1] => 2 [7] => 2 [0] => 1 [6] => 1 )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [5] => 6 [11] => 6 [4] => 5 [10] => 5 [3] => 4 [9] => 4 [2] => 3 [8] => 3 [1] => 2 [7] => 2 [0] => 1 [6] => 1 )
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Array ( [11] => 6 [5] => 6 [10] => 5 [4] => 5 [9] => 4 [3] => 4 [8] => 3 [2] => 3 [1] => 2 [7] => 2 [6] => 1 [0] => 1 )

preferences:
228.92 ms | 402 KiB | 329 Q