array intersect for object array php

Question

I want to know how to array_intersect for object array.

Answer 1

I use array_udiff to implement array_intersect for an object array.

 function diff($a, $b) {
 if($a === $b) {
     return 0;
 } else {
     return 1;}
 }

 $array_1 = array('a', 'b', 'c');    

 $array_2 = array('c', 'd','e');    

 $array = array_udiff($array_1, array_udiff($array_1, $array_2, 'diff'),'diff');

var_dump($array);
return array(1) { [2]=> string(1) "c" }

You can have your own diff function for any scheme.