Auth_OpenID_CheckAuthRequest::fromMessage PHP Method

    static function fromMessage($message, $server = null)
    {
        $required_keys = array('assoc_handle', 'sig', 'signed');
        foreach ($required_keys as $k) {
            if (!$message->getArg(Auth_OpenID_OPENID_NS, $k)) {
                return new Auth_OpenID_ServerError($message, sprintf("%s request missing required parameter %s from \\\n                            query", "check_authentication", $k));
            }
        }
        $assoc_handle = $message->getArg(Auth_OpenID_OPENID_NS, 'assoc_handle');
        $sig = $message->getArg(Auth_OpenID_OPENID_NS, 'sig');
        $signed_list = $message->getArg(Auth_OpenID_OPENID_NS, 'signed');
        $signed_list = explode(",", $signed_list);
        $signed = $message;
        if ($signed->hasKey(Auth_OpenID_OPENID_NS, 'mode')) {
            $signed->setArg(Auth_OpenID_OPENID_NS, 'mode', 'id_res');
        }
        $result = new Auth_OpenID_CheckAuthRequest($assoc_handle, $signed);
        $result->message = $message;
        $result->sig = $sig;
        $result->invalidate_handle = $message->getArg(Auth_OpenID_OPENID_NS, 'invalidate_handle');
        return $result;
    }