3v4l.org

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