Here is a snippet of my code

        $fp = fsockopen($s['url'], 80, $errno, $errstr, 5);
        if($fp){
                fwrite($fp, $out);
                fclose($fp);

When I run it, it outputs:

unable to connect to www.mydomain.net/1/file.php:80 (php_network_getaddresses: getaddrinfo failed: Name or service not known

I can't figure out why. Any help would be greatly appreciated.

EDIT: I forgot to mention that I'm using this to submit GET data to the $s['url']