//Registration is a complex thing. Lets simply it and only add the referral if its set to save query if it isn't..
	if(isset($_POST['referral']))
		{
		//If this is true you are using the ID number.. Easy enough just validate it and continue
		if(preg_match("/[^0-9]/", $_POST['referral']))
			{
			//Validate the variable we are about to use..
			$_POST['referral'] = (int) $_POST['referral'];

			//Validate they exist..
			$result = db_query("SELECT realname
						FROM {$db_prefix}members
						WHERE ID_MEMBER == " . $_POST['referral'], __FILE__, __LINE__);
			//If we got something update Something..
			if(!empty($result))		
				updateMemberData($memberID, array ( 'referral' => $_POST['referral'], ));
			else
				fatal_lang_error(453, false);
			}
		else
			{
			//Well they are trying to find the username itself..
			$_POST['referral'] = trim(preg_replace('~[\s]~' . ($context['utf8'] ? 'u' : ''), ' ', $_POST['referral']));

			$result = db_query("SELECT ID_MEMBER
						FROM {$db_prefix}members
						WHERE realname == " . $_POST['referral'], __FILE__, __LINE__);
			
			//If we got something update Something..
			if(!empty($result))
				{
				while ($row = mysql_fetch_assoc($request))
					updateMemberData($memberID, array ( 'referral' => $row[0], ));
				}
			else
				fatal_lang_error(453, false);
			}
		}