3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = ["a" => "green", "red", "blue"]; $a2 = ["red", "b" => "green", "yellow"]; $res = array_intersect($a1, $a2); print_r($res);

preferences:
32.54 ms | 402 KiB | 5 Q