- var_dump: documentation ( source)
- array_intersect: documentation ( source)
- implode: documentation ( source)
- str_split: documentation ( source)
<?php
$a = str_split('poultry outwits ants');
$b = str_split('plastics');
$c = array_intersect($a,$b);
$c = implode('', $c);
var_dump($c);