<?php define('MY_ORDER', [0 => 2, 1 => 3, 2 => 0, 8 => 1]); $array = [2, 2, 2, 1, 1, 0, 0, 8]; usort($array, function ($a, $b) { static $cache; return ($cache[$a] ??= keyfn($a)) <=> ($cache[$b] ??= keyfn($b)); }); var_export($array); function keyfn($v) { echo "called for $v\n"; return MY_ORDER[$v]; }
You have javascript disabled. You will not be able to edit any code.