3v4l.org

run code in 300+ PHP versions simultaneously
<?php function compare($a, $b) { $order = array('ACO', 'ZCO', 'Other'); $ai = array_search($a, $order); $bi = array_search($b, $order); return $ai<$bi ? -1 : $ai>$bi; } $a = array('ZCO'=>1, 'Other'=>1, 'ACO'=>1); uksort($a, "compare"); print_r($a);

preferences:
32.81 ms | 402 KiB | 5 Q