<html><body>$a1=array("red","green","blue","yellow");$a2=array("red","green","blue");$result=array_intersect_key($a1,$a2);print_r($result);</body><!-- Mirrored from www.w3schools.com/php7/phptryit.asp?filename=tryphp_func_array_intersect_key2 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 13:40:32 GMT --></html>