3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['foo' => 'bar', 'baz' => 'bam']; $b = ['foo' => null, 'baz' => null, 'blamo' => null]; var_dump(array_intersect_key($a, $b));

preferences:
57.98 ms | 402 KiB | 5 Q