仿微信评论代码

　今天项目遇到仿照微信的评论，但是又要有个顶级评论！

.首先看下数据库

user_id   是用户登陆表的id    cate_id是详情页id     pid关联id

// 互相评论回复逻辑   里面有一些点赞和评论数 用户名 用户头像这些，不用可删除  

public function getCommlists($cateId,$pinid,$userId){
        if(empty($cateId)){
            return array();
        }
        $res = M('comment')->where(array('status'=>'1','is_del'=>'0','cate_id'=>$cateId))->order('addtime desc')->select();
        $dataList = $stack = array();
       
        if($res){
            foreach($res AS $k=>$v){   //先将评论的数据进行入库（即comment_id=0）
                
                if($v['pid'] == $pinid){
                    $nickname = $this->user_name_infor($v['user_id']);
                    $infoname = $this->user_name_infor($v['pid']);

                     $v['nickname'] = $nickname['nickname']; 
                     $v['nickname_img']  = $nickname['icon']?$this->img_url.$nickname['icon']:'';
                     $v['infoname'] = $infoname['nickname']; 
                     $v['infoname_img']  =$infoname['icon']?$this->img_url.$infoname['icon']:'';
                     $v['addtime']  = date('Y-m-d H:i:s',$v['addtime']);
                   // $v['like_num'] = $this->zan_infor($v['id']);
                    //是否可删除
                     if($userId == $_v['user_id']){
                        $_v['is_dels']  =1;
                    }else{
                         $_v['is_dels'] =0;
                    }

                    $v['_level'] = 0;   //设置层级数
                    $v['_root'] = $v['id'];   //标识评论id
                    array_push($stack,$v);   //入栈
                    unset($res[$k]);
                }
            }
            while(!empty($stack)){
                $node = array_pop($stack);   //出栈
                $dataList[] = $node;
                foreach($res as $_k=>$_v){
                    if($_v['pid'] == $node['id']){
                         $nickname = $this->user_name_infor($_v['user_id']);
                         $infoname = $this->user_name_infor($_v['pid']);
                         $_v['nickname'] = $nickname['nickname']; 
                         $_v['nickname_img']  = $nickname['icon']?$this->img_url.$nickname['icon']:'';
                         $_v['infoname'] = $infoname['nickname']; 
                         $_v['infoname_img']  =$infoname['icon']?$this->img_url.$infoname['icon']:'';
                         $_v['addtime']  = date('Y-m-d H:i:s',$_v['addtime']);
                       // $_v['like_num'] = $this->zan_infor($_v['id']);
                          //是否可删除
                             if($userId == $_v['user_id']){
                                $_v['is_dels']  =1;
                            }else{
                                 $_v['is_dels'] =0;
                            }
                        $_v['level'] = $node['_level']+1;   //设置层级数
                        $_v['_root'] = $node['_root'];   //标识评论id
                        array_push($stack,$_v);   //入栈
                        unset($res[$_k]);
                    }
                }
            }
        }
      
        $dataList['count'] = count($dataList);
        return $dataList;
    }

// 根据id 获取用户信息
  public function  user_name_infor($user_id){
              $username =   M("User")->where(['id'=>$user_id])->find(); 
              return $username;  
  }

// 根据id 获取评论点赞数
  public function  zan_infor($id){
              $like_num = M("Comment_zan")->where(['com_id'=>$id])->count();
              return $like_num;  
  }

// 把查询出来的字集 挂到第一集评论下面   $userId用户登陆的id  数据表中的user_id  

          $res =  M('comment')->where($where)->order('addtime desc')->select();   
         
          foreach ($res as $k => $v) {
                  $er=$this->getCommlists($cateId,$v['id'],$userId);
                  $user_res =  $this->user_name_infor($v['user_id']);
                  $res[$k]['nickname'] =$user_res['nickname']; 
                  $res[$k]['img'] =$user_res['icon']?$this->img_url.$user_res['icon']:'';
                  $res[$k]['children'] = $er;
                  $res[$k]['count'] =  $res[$k]['children']['count'];// 提取评论数
                  $res[$k]['is_top'] = $v['sort'];
                  $res[$k]['addtime']  = date('Y-m-d H:i:s',$v['addtime']);
                  unset( $res[$k]['children']['count']);
                  $res[$k]['like_num']  = $this->zan_infor($v['id']);
                   //是否可删除
                     if($userId == $v['user_id']){
                        $res[$k]['is_dels']  =1;
                    }else{
                         $res[$k]['is_dels'] =0;
                    }
          }