<?php
$browser = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36
";
switch ($browser) {
case "Chrome":
echo "Chrome";
break;
case "Firefox":
echo "Firefox";
break;
case "cake":
echo "i is cake";
break;
}