- var_dump: documentation ( source)
- array_intersect: documentation ( source)
- array_diff: documentation ( source)
<?php
var_dump(array_diff(array(1, 2, 4)+array(1, 2, 5), array_intersect(array(1, 2, 4),array(1, 2, 5))));
var_Dump(array(1, 2, 4)+array(1, 2, 5));