Auth_OpenID_GenericConsumer::_checkReturnTo PHP Method

    function _checkReturnTo($message, $return_to)
    {
        // Check an OpenID message and its openid.return_to value
        // against a return_to URL from an application.  Return True
        // on success, False on failure.
        // Check the openid.return_to args against args in the
        // original message.
        $result = Auth_OpenID_GenericConsumer::_verifyReturnToArgs($message->toPostArgs());
        if (Auth_OpenID::isFailure($result)) {
            return false;
        }
        // Check the return_to base URL against the one in the
        // message.
        $msg_return_to = $message->getArg(Auth_OpenID_OPENID_NS, 'return_to');
        if (Auth_OpenID::isFailure($return_to)) {
            // XXX log me
            return false;
        }
        $return_to_parts = parse_url(Auth_OpenID_urinorm($return_to));
        $msg_return_to_parts = parse_url(Auth_OpenID_urinorm($msg_return_to));
        // If port is absent from both, add it so it's equal in the
        // check below.
        if (!array_key_exists('port', $return_to_parts) && !array_key_exists('port', $msg_return_to_parts)) {
            $return_to_parts['port'] = null;
            $msg_return_to_parts['port'] = null;
        }
        // If path is absent from both, add it so it's equal in the
        // check below.
        if (!array_key_exists('path', $return_to_parts) && !array_key_exists('path', $msg_return_to_parts)) {
            $return_to_parts['path'] = null;
            $msg_return_to_parts['path'] = null;
        }
        // The URL scheme, authority, and path MUST be the same
        // between the two URLs.
        foreach (array('scheme', 'host', 'port', 'path') as $component) {
            // If the url component is absent in either URL, fail.
            // There should always be a scheme, host, port, and path.
            if (!array_key_exists($component, $return_to_parts)) {
                return false;
            }
            if (!array_key_exists($component, $msg_return_to_parts)) {
                return false;
            }
            if (Auth_OpenID::arrayGet($return_to_parts, $component) !== Auth_OpenID::arrayGet($msg_return_to_parts, $component)) {
                return false;
            }
        }
        return true;
    }

 function _checkReturnTo($unused, $unused2)
 {
     if ($this->return_to_check_disabled) {
         return true;
     } else {
         return parent::_checkReturnTo($unused, $unused2);
     }
 }