- print_r: documentation ( source)
- explode: documentation ( source)
- in_array: documentation ( source)
<?php
$array1 = "a_b_c";
$array2 = array("a","c","d","e");
$promotion = explode("_",$array1);
foreach($promotion as $promo)
{
if(in_array($promo,$array2))
{
print_r($promo);
break;
}
}