3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1 = array(0 => "123",1=>"21"); $arr2 = array(0 => "1",1=>"21",2=>"123"); $arr3 = array_intersect($arr1,$arr2); print_r($arr3);

preferences:
25.04 ms | 405 KiB | 5 Q