3v4l.org

run code in 300+ PHP versions simultaneously
<?php $items = array(new \stdClass()); $udiff = array_udiff($items, $items, function ($a, $b) { $result = $a === $b; print($result."\n"); return $result; }); var_dump($udiff);

preferences:
35.46 ms | 402 KiB | 5 Q