<html><body>function myfunction($a,$b){if ($a===$b) { return 0; } return ($a>$b)?1:-1;}$a1=array("a"=>"red","b"=>"green","c"=>"blue");$a2=array("a"=>"blue","b"=>"black","e"=>"blue");$result=array_intersect_ukey($a1,$a2,"myfunction");print_r($result);</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_array_intersect_ukey by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:50:52 GMT --></html>