递归查询无限级分类最底层分类

传一个id，查询无限级分类最底层分类

findInfo(9);
function findInfo($id,&$data = array()) {
        $test = M('test','','');
        $result = $test->where("pid=$id")->field('id,name')->select();
        if(!$result[0]['id']){
           return $data;
        }else{
           return $this->findInfo($result[0]['id'],$result);
        }


    }