- strstr: documentation ( source)
<?php
$array = array( 0 => 'x-ice', 2 => 'x-icenorth', 4 => 'x-icexi2', 4 => 'x-icexi3');
$arrays =$array;
foreach($array as $key => $arr)
{
if(strstr($string, $arr)){
//some code here
break;
}
}