Unlimited classification of thinkphp5 data

1.方式一

namespace app\index\model;

use think\Model;

class Classfiy extends Model{
    protected $table = 'classfiy';
    // 方式一
    public function htmllist(){
        $data=$this->select();

        return $this->htmllistM($data);
    }
    public function htmllistM($data,$pid=0,$lev=''){
        static $arr=array();
        foreach($data as $key=>$value){
            if($value['pid']==$pid){
                $value['lev']=$lev;
                $arr[]=$value;
                $this->htmllistM($data,$value['id'],$lev.'!--');
            }
        }
        return $arr;
    }
// 方式二
    public function getHtmlList(&$result = [], $pid = 0, $prefx = '')
    {
       $data = $this->select();
       // $data = $this->select()->toarray();//有时出错

       foreach ($data as $value) {
               if ($value['pid'] == $pid) {
                   $value['name'] = $prefx.$value['name'];
                   $result[] = $value;
                   $this->getHtmlList($result,$value['id'],$prefx.'|--');
           }
       }

       return $result;
        }
}

?>

方式一返回的数据形式是

{
   "ret": 200,
   "data": [
       {
           "id": 1,
           "name": "手机",
           "pid": 0,
           "static": 1,
           "time": 1588775166,
           "last_time": null,
           "delete_time": null,
           "lev": ""
       },
       {
           "id": 4,
           "name": "华为手机",
           "pid": 1,
           "static": 1,
           "time": 1588776159,
           "last_time": null,
           "delete_time": null,
           "lev": "!--"
       },
       {
           "id": 6,
           "name": "苹果手机",
           "pid": 1,
           "static": 1,
           "time": 1588776200,
           "last_time": null,
           "delete_time": null,
           "lev": "!--"
       },
       {
           "id": 2,
           "name": "电脑",
           "pid": 0,
           "static": 0,
           "time": 1588775190,
           "last_time": null,
           "delete_time": null,
           "lev": ""
       },
       {
           "id": 5,
           "name": "华为电脑",
           "pid": 2,
           "static": 0,
           "time": 1588776185,
           "last_time": 1588816674,
           "delete_time": null,
           "lev": "!--"
       },
       {
           "id": 7,
           "name": "苹果电脑",
           "pid": 2,
           "static": 1,
           "time": 1588776215,
           "last_time": 1588816980,
           "delete_time": null,
           "lev": "!--"
       }
   ],
   "msg": ""}

方式二返回的数据 格式是

{
"ret": 200,
"data": [
"{
"id": 1,
"name": "mobile phone",
"pid" ": 0,
"static": 1,
"time": 1588775166,
"last_time": null,
"delete_time": null
},
{
"ID": 4,
"name": "|-Huawei mobile phone",
"pid": 1,
"Static": 1,
"Time": 1588776159,
"last_time": null,
"delete_time": null
},
"id": 6,
"name": "|--iPhone",
"pid": 1,
"static": 1,
"time": 1588776200,
"last_time": null,
"delete_time": null
},
"id": 2,
"name": "computer",
"pid": 0,
"static": 0,
"time": 1588 775190,
"last_time": null,
"delete_time": null
},
"id": 5,
"name": "|--Huawei Computer",
"pid": 2,
"static": 0,
"time": 1588776185,
"last_time": 1588816674,
" delete_time": null
},
                                                                   "id": 7,
                                                                                                                                                                                                     "id": 7, : 1588776215,
"last_time": 1588816980,
"delete_time": null
}
],
"msg": ""

}

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