tp3.2.3無限級分類

一、數據庫（存儲分類信息的表）

二、代碼實現

1、添加分類

public function add(){
    $cate=D('category');
    if(IS_POST){
        $data['cate_name']=I('cate_name');
        $data['cate_ename']=I('cate_ename');
        $data['cate_keywords']=I('cate_keywords');
        $data['cate_desc']=I('cate_desc');
        $data['cate_type']=I('cate_type');
        $data['parentid']=I('parentid');
        $data['cate_content']=I('cate_content');
        $data['cate_pic']='';
        if($_FILES['cate_pic']['tmp_name']!=''){
            $upload=new \Think\Upload();
            $upload->maxSize=3145728 ;
            $upload->exts=array('jpg', 'gif', 'png', 'jpeg');
            $upload->savePath='./Public/Uploads/';
            $upload->rootPath='./';
            $info=$upload->uploadOne($_FILES['cate_pic']);
            if(!$info){
                $this->error($upload->getError());
            }else{
$data['cate_pic']=$info['savepath'].$info['savename'];
            }
        }
        if($cate->create($data)){
            if($cate->add()){
                $this->success('添加成功！',U('lst'));
            }else{
                $this->error('添加失敗！',U('lst'));
            }
        }else{
            $this->error($cate->getError());
        }
        return;
    }
    $cateres=$cate->catetree();
    $this->assign('cateres',$cateres);
    $this->display();
}

注：添加成功失敗提醒用的是tp自帶的，界面特醜，建議使用javascript。

2、顯示分類

控制器：

public function lst(){
    $cate=D('category');
    $category=$cate->catetree();
    $this->assign('cates',$category);
    $this->display();
}

模型：

//分類樹
public function catetree(){
    $data=$this->select();
    return $this->resort($data);
}
public function resort($data,$parentid=0,$level=0){
    static $ret=array();
    foreach ($data as $k=>$v){
        if($v['parentid']==$parentid){
            $v['level']=$level;
            $ret[]=$v;
            $this->resort($data,$v['cate_id'],$level+1);
        }
    }
    return $ret;
}

3、刪除分類

刪除分類有兩種處理方式：一種是其下一級分類改爲頂級分類；另一種是將其所有子級分類刪除。下面是第二種處理方法的代碼實現：
控制器：

public function del($cate_id){
    $cate=D('category');
    if($cate->delete($cate_id)){
        $this->success('刪除成功！',U('lst'));
    }else{
        $this->error('刪除失敗！');
    }
}

模型：

public function childrenid($cate_id){
    $data=$this->select();
    return $this->getChildrenid($data,$cate_id);
}
public function getChildrenid($data,$parentid){
    static $ret=array();
    foreach ($data as $k=>$v){
        if($v['parentid']==$parentid){
            $ret[]=$v['cate_id'];
            $this->getChildrenid($data,$v['cate_id']);
        }
    }return $ret;
}
public function _before_delete($options){
    if(is_array($options['where']['cate_id'])){
        $arr=explode(',',$options['where']['cate_id'][1]);
        $soncates=array();
        foreach($arr as $k=>$v){
            $soncates2=$this->childrenid($v);
            $soncates=array_merge($soncates,$soncates2);
        }
        $soncates=array_unique($soncates);
        $soncates=implode(',',$soncates);
        if($soncates){
            $this->execute("delete from cy_category where cate_id in ($soncates)");
        }
    }else{
        $childrenids=$this->childrenid($options['where']['cate_id']);
        $childrenids=implode(',',$childrenids);
        if($childrenids){
            $this->execute("delete from cy_category where cate_id in ($childrenids)");
        }
    }
}