- var_dump: documentation ( source)
- array_intersect: documentation ( source)
<?php
$a = Array
(
15 => "0,1",
16 => "0,0",
2 => "0,2",
3 => "0,3",
4 => "10,2"
);
$b = Array
(
0 => "0,1",
1 => "0,0"
);
Var_dump(array_intersect($a, $b));