数据表结构

id	name	pid

 

 

private function tree($data,$p_id=0){        foreach($data as $row){            if($row['pid']==$p_id){                $tmp = $this->tree($data,$row['id']);                if($tmp){                    $row['child']=$tmp;                }else{                    $row['leaf'] = true;                }                $tree[]=$row;                            }        }        Return $tree;    }