Mine

<?php	class whois	{		function query($domain)		{			if (!function_exists('fsockopen'))			{				return false;			}						$sock = @fsockopen('rs.internic.net', 43);					if (!$sock)			{				return false;			}						$domain = strtoupper($domain);						fwrite($sock, $domain . "\r\n");						$response = '';						while(!feof($sock))			{				$response .= fread($sock, 1024);			}						fclose($sock);						if (strpos($response, sprintf('No match for "%s"', $domain)) === false)			{				return false;			}			else 			{				return true;			}		}	}	?>