- var_dump: documentation ( source)
- array_intersect: documentation ( source)
- array_diff: documentation ( source)
<?php
$a = array('1','2','3','4');
$b = array('4','5','6','7');
$c = array_intersect($a, $b);
Var_dump($c);
$d = array_diff($a,$b);
Var_dump($d);