3v4l.org

run code in 300+ PHP versions simultaneously
<?php function cmp($a, $b) { return $b - $a; } $a = array(3, 2, 5, 6, 1); usort($a, "cmp"); foreach ($a as $key => $value) { echo "$key: $value\n"; }

preferences:
40.26 ms | 402 KiB | 5 Q