具體方法：

// 遞歸重新排序無限極子分類數組
function recursive($array,$pid=0,$level=0){
    $arr = array();
    foreach ($array as $v) {
        if($v[‘pid‘] == $pid){
            $v[‘level‘] = $level;
            $v[‘html‘] = str_repeat(‘--‘,$level);
            $arr[] = $v;            
            $arr = array_merge($arr
 
,recursive($array,$v[‘id‘],$level+1));
        }
    }
    return $arr;
}
//遞歸獲取所有的子分類的ID
function get_all_child($array,$id){
    $arr = array();
    foreach($array as $v){
        if($v[‘pid‘] == $id){
            $arr[] = $v[‘id‘];
            $arr = array_merge($arr,get_all_child($array,$v[‘id‘]));
        };
    };
    
 
return $arr;
}

增刪改方法示例：

<?php
namespace Admin\Controller;
use Think\Controller;
class CategoryController extends Controller {
    public function index(){
        $cateTopList = M(‘category‘)->select();
        $cateTopList = recursive($cateTopList);
        $this->assign(‘cateTopList‘,$cateTopList
 
);
        $this->display();
    }
    public function addTop(){        
        $this->display();
    }
    public function addCate(){
        $data = I(‘post.‘);
        if(M(‘category‘)->add($data)){
            $this->success(‘添加成功‘, ‘index‘);
        }else{
            $this->error(‘添加失敗‘);
        };
    }
    // 添加子分類
    public function addChild(){
        $pid = I(‘get.pid‘);
        $where = array(‘id‘ => $pid);
        $pCateName = M(‘category‘)->where($where)->getField(‘name‘);        
        $this->assign(‘pid‘,$pid);
        $this->assign(‘pCateName‘,$pCateName);        
        $this->display();
    }
    //修改分類
    public function edit(){
        $pid = I(‘get.pid‘);
        $where = array(‘id‘ => $pid);
        $pCateName = M(‘category‘)->where($where)->getField(‘name‘);
        $this->assign(‘pid‘,$pid);
        $this->assign(‘pCateName‘,$pCateName);
        $this->display();
    }
    public function editCate(){
        $post = I(‘post.‘);        
        $date = array(
            ‘id‘ => $post[‘pid‘],
            ‘name‘ => $post[‘name‘]
        ); 
        if(M(‘category‘)->save($date)){
            $this->success(‘修改成功‘,‘Index‘);
        }else{
            $this->error(‘修改失敗‘);
        };
    }
    //刪除分類
    public function delCate(){
        $get = I(‘get.pid‘);
        $cateId = M(‘category‘)->field(array(‘id‘,‘pid‘))->select();
        $delId = get_all_child($cateId,$get);
        $delId[] = $get;    
        $where = array(
            ‘id‘ => array(‘IN‘,$delId)
        );
        if(!M(‘category‘)->where($where)->delete()){
            $this->error(‘刪除失敗‘);
        };
        $this->success(‘刪除成功‘,U(‘index‘));
    }
}

問答項目---欄目增刪改方法示例