qq::upload PHP Method

    public function upload($text, $opt, $pic)
    {
        if (file_exists($pic)) {
            $params = array('content' => $text);
            $multi = array('pic' => $pic);
            return Tencent::api('t/add_pic', $params, 'POST', $multi);
        } else {
            return $this->update($text, $opt);
        }
    }