3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(NULL, 1,-1,0,2,0,-2); sort($a, SORT_NUMERIC); print_r($a);
Output for 7.0.0 - 7.0.20, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => -2 [1] => -1 [2] => [3] => 0 [4] => 0 [5] => 1 [6] => 2 )
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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Array ( [0] => -2 [1] => -1 [2] => 0 [3] => 0 [4] => [5] => 1 [6] => 2 )

preferences:
237.31 ms | 403 KiB | 338 Q