在ThinkPhp中实现无限极分类

IndexController.class.php

<?php
namespace Home\Controller;
use Think\Controller;
class IndexController extends Controller {
    //查询全部数据
    public function index(){
        //实例化model
        $User=D('Address');
        $arr = $User->sel_all();
        //print_r($arr);die;
        $this->assign('arr',$arr);
        $this->display();
    }

}

?>

AddressModel.class.php

<?php
namespace Home\Model;
use Think\Model;
class AddressModel extends Model{
    //查询address表中所有数据
    public function sel_all(){
        $arr = $this->Table('address')->select();
        return $this->list_level($arr,$pid=0,$level=0);
    }
    //递归遍历数据
    public function list_level($arr,$pid=0,$level=0){
        //定义一个静态数组
        static $data = array();
        foreach($arr as $k => $v){
            if($v['pid'] == $pid){
                $v['level'] = $level;
                $data[] = $v;
                $this->list_level($arr,$v['id'],$level+1);
            }
        }
        return $data;
    }
}

View

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<table border='1'>
    <th>编号</th>
    <th>地区</th>
    <th>层级</th>
    <foreach name='arr' item='v'>
        <tr>
            <td>{$v.id}</td>
            <!--str_repeat('字符串','重复的次数');重复一个字符串-->
            <td><?php echo str_repeat('----',$v['level']);?>{$v.name}</td>
            <td>
                <if condition="$v['level'] eq 0">
                    一级分类
                    <elseif condition="$v['level'] eq 1"/>
                    二级分类
                    <else/>
                    三级分类
                </if>
            </td>
        </tr>
    </foreach>
</table>
</body>
</html>

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