3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); $a2=array("e"=>"red","f"=>"green","g"=>"blue"); $result=array_diff($a1,$a2); print_r($result);

preferences:
56.69 ms | 402 KiB | 5 Q