3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(NULL, 1,-1,0,2,0,-2); sort($a, SORT_STRING); print_r($a);
based on XEQKa
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => [1] => -1 [2] => -2 [3] => 0 [4] => 0 [5] => 1 [6] => 2 )