Auth_OpenID_PAPE_Response::fromSuccessResponse PHP Method

    static function fromSuccessResponse($success_response)
    {
        $obj = new Auth_OpenID_PAPE_Response();
        // PAPE requires that the args be signed.
        $args = $success_response->getSignedNS(Auth_OpenID_PAPE_NS_URI);
        if ($args === null || $args === array()) {
            return null;
        }
        $result = $obj->parseExtensionArgs($args);
        if ($result === false) {
            return null;
        } else {
            return $obj;
        }
    }

 function check()
 {
     $this->config->load('openid');
     $request_to = site_url($this->config->item('openid_request_to'));
     $this->openid->set_request_to($request_to);
     $response = $this->openid->getResponse();
     switch ($response->status) {
         case Auth_OpenID_CANCEL:
             $data['msg'] = $this->lang->line('openid_cancel');
             break;
         case Auth_OpenID_FAILURE:
             $data['error'] = $this->_set_message('openid_failure', $response->message);
             break;
         case Auth_OpenID_SUCCESS:
             $openid = $response->getDisplayIdentifier();
             $esc_identity = htmlspecialchars($openid, ENT_QUOTES);
             $data['success'] = $this->_set_message('openid_success', array($esc_identity, $esc_identity), array('%s', '%t'));
             if ($response->endpoint->canonicalID) {
                 $data['success'] .= $this->_set_message('openid_canonical', $response->endpoint->canonicalID);
             }
             $sreg_resp = Auth_OpenID_SRegResponse::fromSuccessResponse($response);
             $sreg = $sreg_resp->contents();
             foreach ($sreg as $key => $value) {
                 $data['success'] .= $this->_set_message('openid_content', array($key, $value), array('%s', '%t'));
             }
             $pape_resp = Auth_OpenID_PAPE_Response::fromSuccessResponse($response);
             if ($pape_resp) {
                 if ($pape_resp->auth_policies) {
                     $data['success'] .= $this->lang->line('openid_pape_policies_affected');
                     foreach ($pape_resp->auth_policies as $uri) {
                         $data['success'] .= "<li><tt>{$uri}</tt></li>";
                     }
                     $data['success'] .= "</ul>";
                 } else {
                     $data['success'] .= $this->lang->line('openid_pape_not_affected');
                 }
                 if (isset($pape_resp->auth_age) && $pape_resp->auth_age) {
                     $data['success'] .= $this->_set_message('openid_auth_age', $pape_resp->auth_age);
                 }
                 if ($pape_resp->nist_auth_level) {
                     $data['success'] .= $this->_set_message('openid_nist_level', $pape_resp->nist_auth_level);
                 }
             } else {
                 $data['success'] .= $this->lang->line('openid_pape_noresponse');
             }
             break;
     }
     $data['pape_policy_uris'] = array(PAPE_AUTH_MULTI_FACTOR_PHYSICAL, PAPE_AUTH_MULTI_FACTOR, PAPE_AUTH_PHISHING_RESISTANT);
     //		echo "nickname: $nickname";
     //		echo "esc_identity: $esc_identity";
     $this->load->view('view_openid', $data);
 }