Hey there!
Welp, you forgot a '0' and you're pinging the servers each 3 seconds instead of 30s and if I add (yeah I know that is only one per ip) a lot of servers the server will get overloaded easily.
By the way, using setInterval won't load the 'servers' div until the first interval is called, that means, if you set it to 30s it won't load the server list until they pass 30 seconds.
The last thing:
Code:
<b>Warning</b>: : failed to open stream: No such file or directory in <b>/opt/lampp/docs/pschecker.tk/classes/Class.Servers.php</b> on line <b>464</b><br />
Hope it helps!
Regards!.-