<?// This function tries to open a TCP connection to $server on port $port.// If it fails, it will call mail(BLABLABLA).// Return value: true if connection was successful, false if not.function is_online($server='localhost',$port=80,$timeout=2) { $fp = @fsockopen($server, $port, &$errno, &$errstr, $timeout); if (!$fp) { fclose($fp); echo "<strong><font color=\"red\">Offline</font></strong>"; mail(BLABLABLA); return false; } fclose($fp); echo "<strong><font color=\"lime\">Online</font></strong>"; return true;}?>@@HTTP <?php is_online('127.0.0.1',80) ?>