qq::getUrl PHP Method

    public function getUrl($url)
    {
        if ($url) {
            $this->loginUrl = $url;
            return $this->loginUrl;
        }
        OAuth::init(QQ_KEY, QQ_SECRET);
        $url = $this->getCallback('qq');
        $this->loginUrl = OAuth::getAuthorizeURL($url);
        return $this->loginUrl;
    }

 public function login_qq()
 {
     include_once DOC_ROOT_PATH . 'Addons/plugins/login/qq.class.php';
     $o = new qq();
     $login_url = $o->getUrl();
     redirect($login_url);
 }