qzone::checkUser PHP Метод

    public function checkUser()
    {
        if ($_REQUEST['code'] && $_REQUEST['state'] == $_SESSION['state']) {
            $token_url = 'https://graph.qq.com/oauth2.0/token?grant_type=authorization_code&client_id=' . QZONE_KEY . '&code=' . $_REQUEST['code'] . '&client_secret=' . QZONE_SECRET . '&redirect_uri=' . $this->getCallback('qzone', $callbackurl);
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $token_url);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            $response = curl_exec($ch);
            if (strpos($response, 'callback') !== false) {
                $lpos = strpos($response, '(');
                $rpos = strrpos($response, ')');
                $response = substr($response, $lpos + 1, $rpos - $lpos - 1);
                $msg = json_decode($response);
                if (isset($msg->error)) {
                    return false;
                    //echo "<h3>error:</h3>" . $msg->error;
                    //echo "<h3>msg  :</h3>" . $msg->error_description;
                    //exit;
                }
            }
            $params = array();
            parse_str($response, $params);
            $access_token = $params['access_token'];
            $graph_url = 'https://graph.qq.com/oauth2.0/me?access_token=' . $access_token;
            curl_setopt($ch, CURLOPT_URL, $graph_url);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            $response = curl_exec($ch);
            if (strpos($response, 'callback') !== false) {
                $lpos = strpos($response, '(');
                $rpos = strrpos($response, ')');
                $response = substr($response, $lpos + 1, $rpos - $lpos - 1);
            }
            $user = json_decode($response);
            if (isset($user->error)) {
                echo '<h3>error:</h3>' . $user->error;
                echo '<h3>msg  :</h3>' . $user->error_description;
                exit;
            } else {
                $_SESSION['qzone']['access_token']['oauth_token'] = $access_token;
                $_SESSION['qzone']['access_token']['oauth_token_secret'] = $user->openid;
                $_SESSION['qzone']['isSync'] = 1;
                $_SESSION['qzone']['openid'] = $user->openid;
                //$_SESSION['qzone']['uid'] = $user->openid;
                //$_SESSION['qzone']['uname'] = $res['user']['name'];
                $_SESSION['open_platform_type'] = 'qzone';
            }
        } else {
            return false;
        }
        return true;
    }