/**
  * 
  * 删除评论
  */
 public function delComment()
 {
     $PS = new PaperService();
     $url = U('Forum/index', array('id' => I('get.post_id')));
     if (empty(session(home)) || empty(I('get.', '', 'intval'))) {
         $this->error('不好意思,该操作有误', $url);
     }
     $res = $PS->doDelComment(I('get.', '', 'intval'));
     $res ? $this->success('删除评论成功', $url) : $this->error($res, $url);
     exit;
 }