3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function cmp($a, $b) { if ($a == $b) { return 0; } return ($a < $b) ? -1 : 1; } $a = array(3, 2, 5, 6, 1); usort($a, "cmp"); foreach ($a as $key => $value) { echo "$key: $value\n"; }
Output for 4.3.0 - 5.6.29, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
0: 1 1: 2 2: 3 3: 5 4: 6