3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ 'foo' => [1], 'bar' => 5, ]; $b = [ 'foo' => [1], 'bar' => 6, ]; $i = array_diff($a, $b); var_dump($i);

preferences:
51.78 ms | 402 KiB | 5 Q