- var_export: documentation ( source)
- array_flip: documentation ( source)
- usort: documentation ( source)
<?php
$array = ['val1', 'val2', 200, 179, 230, 234, 242];
$order = [230, 234, 242, 179, 100];
$keyedOrder = array_flip($order); // for efficiency
usort($array, function($a, $b) use ($keyedOrder) {
return [$keyedOrder[$a] ?? -1, $a]
<=>
[$keyedOrder[$b] ?? -1, $b];
});
var_export($array);