function post()
 {
     $tid = isset($_POST['tid']) ? intval($_POST['tid']) : 0;
     $content_i = replaceSpecialChar(h($_POST['content']));
     if (empty($content_i)) {
         $this->error('请输入内容');
     }
     if ($tid > 0 && !empty($content_i)) {
         $topic = gettopic($tid);
         //获取话题内容
         import('ORG.Net.IpLocation');
         $ip = new IpLocation();
         if ($_POST['attach']) {
             $post['attach'] = serialize($_POST['attach']);
         }
         //添加附件
         $post['gid'] = $this->gid;
         $post['uid'] = $this->mid;
         $post['tid'] = $tid;
         $post['content'] = h($_POST['content']);
         $post['istopic'] = 0;
         $post['ctime'] = time();
         $post['ip'] = $ip->get_client_ip();
         $title_data['actor'] = $this->mid;
         $body_data['gid'] = $this->gid;
         $body_data['tid'] = $tid;
         $body_data['title'] = $topic['title'];
         if (isset($_POST['quote'])) {
             //如果引用帖子
             $qid = isset($_POST['qid']) ? intval($_POST['qid']) : 0;
             //引用帖子id
             $post['quote'] = $qid;
             $postData = getPost($qid);
             if ($postData['uid'] != $this->mid) {
                 //通知
                 $cate = "notification";
                 $this->api->notify_setAppId($this->appId);
                 $this->api->notify_send($postData['uid'], 'group_topic_quote', $title_data, $body_data, $url, $cate);
                 setScore($this->mid, 'group_topic_reply');
             }
         }
         $result = $this->post->add($post);
         //添加回复
         if ($result) {
             //添加回复通知
             if (!($topic['uid'] == $this->mid || $postData['tid'] == $topic['id'])) {
                 //如果不是回复自己
                 //通知
                 $cate = "notification";
                 $this->api->notify_setAppId($this->appId);
                 $this->api->notify_send($topic['uid'], 'group_reply', $title_data, $body_data, $url, $cate);
                 setScore($this->mid, 'group_topic_reply');
             }
             //添加动态
             $this->api->feed_publish('group_topic_post', $title_data, $body_data, $this->appId, 0, $this->gid);
             $this->topic->setField('replytime', time(), 'id=' . $tid);
             $this->topic->setInc('replycount', 'id=' . $tid);
         }
         redirect(__APP__ . "/Topic/topic/gid/{$this->gid}/tid/" . $tid);
     }
     redirect(__APP__ . "/Topic/index/gid/{$this->gid}");
 }