Preventing warnings from fsockopen

I use fsockopen() to connect to multiple servers in a loop.

However some servers are not valid and I get PHP warnings like the one below:

Warning: fsockopen() [function.fsockopen]: php_network_getaddresses: getaddrinfo failed: The requested name is valid, but 开发者_Go百科no data of the requested type was found

Is there a way to prevent these warnings.

Like checking whether the server is good before trying to fsockopen it?

Or is there another or better solution for this?

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Use the error control operator and check the results of fsockopen() to verfiy you have a valid connection.

$rc = @fsockopen(...);
if (is_resource($rc))
{
   // do work
}