think\Model::data PHP Method

    public function data($data, $value = null)
    {
        if (is_string($data)) {
            $this->data[$data] = $value;
        } else {
            // 清空数据
            $this->data = [];
            if (is_object($data)) {
                $data = get_object_vars($data);
            }
            if (true === $value) {
                // 数据对象赋值
                foreach ($data as $key => $value) {
                    $this->setAttr($key, $value, $data);
                }
            } else {
                $this->data = $data;
            }
        }
        return $this;
    }

 public function comment($id)
 {
     $model = new Model('Article');
     $article = $model->find(array('articleId' => $id));
     if (empty($article)) {
         $this->error('文章不存在');
     }
     $key = get_client_ip() . '-view-article-' . $id;
     $cache = S($key);
     if (!empty($cache)) {
         $this->error('评论间隔必须大于1分钟');
     }
     $nickname = I('nickname');
     $content = I('content');
     if (empty($nickname)) {
         $this->error('昵称不能为空');
     }
     if (empty($content)) {
         $this->error('评论内容不能为空');
     }
     $data = array('nickname' => $nickname, 'content' => $content, 'createdAt' => time(), 'createdIp' => get_client_ip(), 'articleId' => $id);
     $commentModel = new Model('Comment');
     if (!$commentModel->data($data)->add()) {
         $this->error('评论失败');
     }
     S($key, 1, 60);
     $data['createdAt'] = date('m-d H:i', $data['createdAt']);
     $this->ajaxReturn($data);
 }