Gameserver Monitoring

I'm trying to do up a gameserver monitoring script whereby, I'm able to check if a particular game service is up or down.

In this example, I'm trying to check if the port 7777 is up (Unreal Tournament server).

PHP Code:

<?php$server = "xxx.xxx.xxx.xx";$fp = fsockopen("$server",7777,$errno,$errstr,30);            if ($fp)            {                $fplist = green;            }            else            {                fclose($fp);                $fplist = red;            }?>Colour is <?php echo $fplist; ?>

I've tried this on an actual UT server which is currently online, but for some reason, it keeps on giving me red (to signify a down service).