Please Help with fsockopen

[bennyc]

I have a php script
opening sock with

$sock = fsockopen($server,$port, $errorno, $errstr, 30);

and my scripts are determined within

while ($sock) { ... }

is there anyway for me to check wether the connection is vaild or not? just like sending a PING waiting for SERVER to PONG back every 1 minute? if there's no response over 1 min, it will reconnect itself?

Thanks for reading my problem 🙂