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@ 2015-12-17T15:12:34Z

<?php

interface Foo {}

class Bar {}

class Qux implements Foo {}

$bars = [new Bar(), new Bar()];
$quxs = [new Qux(), new Qux()];

usort($bars, function(Foo $a, Foo $b) { return 0; });

var_dump($bars);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
usort: documentation ( source)

preferences:dark modelive preview

44.04 ms | 402 KiB | 5 Q