$ch = curl_init();
$url = "/var/www/cgi-bin/login.pl?username=".$_POST['log']."&pass=".$_POST['pwd'];
$timeout = 0; // set to zero for no timeout
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
echo $file_contents;

//how about this
//$url = "/var/www/cgi-bin/login.pl?".$_POST['log']."%20".$_POST['pwd'];