PFinal\Wechat\Service\MessageService::sendAll PHP Method

    public static function sendAll($groupId, MassMessage $message, $is_to_all = false)
    {
        $url = 'https://api.weixin.qq.com/cgi-bin/message/mass/sendall?access_token=ACCESS_TOKEN';
        $data = array('filter' => array('is_to_all' => $is_to_all, 'group_id' => $groupId));
        $data = array_merge($data, $message->jsonData());
        $data['msgtype'] = $message->type();
        return parent::request($url, $data);
    }