PHP tp6 购物车的流程

本文主要是介绍PHP tp6 购物车的流程，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

控制层

/加入购物车  表单提交
    public function addcart()
    {
//        if(request()->isGet()){
//            //如果是get请求 跳转到首页
//            $this->redirect('home/index/index');
//        }
        //接收数据
        $params = input();
//        var_dump($params);die;
        //参数检测
        $validate = $this->validate($params, [
            'goods_id' => 'require|integer|gt:0',
            'number' => 'require|integer|gt:0',
            'spec_goods_id' => 'integer|gt:0',
        ]);
        if($validate !== true){
            $this->error($validate);
        }
        //判断登录状态：已登录，添加到数据表；未登录，添加到cookie
        //处理数据 调用封装好的方法
        \app\home\logic\CartLogic::addCart($params['goods_id'], $params['spec_goods_id'], $params['number']);
        //结果页面展示
        //查询商品相关信息以及SKU信息
        $goods = \app\common\model\Goods::getGoodsWithSpec($params['spec_goods_id'], $params['goods_id']);
        return view('addcart', ['goods' => $goods, 'number' => $params['number']]);
    }

    public function index()
    {
        //查询所有的购物记录
        $list = \app\home\logic\CartLogic::getAllCart();
//        var_dump($list);die;
        //对每一条购物记录 查询商品相关信息（商品信息和SKU信息）
        foreach($list as &$v){
            //$v['goods_id']  $v['spec_goods_id']
            $v['goods'] = \app\common\model\Goods::getGoodsWithSpec($v['spec_goods_id'], $v['goods_id'])->toArray();
        }
        unset($v);
        return view('index', ['list' => $list]);
    }

    /**
     * ajax修改购买数量
     */
    public function changenum()
    {
        //接收参数  id  number
        $params = input();
        //参数检测
        $validate = $this->validate($params, [
            'id' => 'require',
            'number' => 'require|integer|gt:0'
        ]);
        if($validate !== true){
            $res = ['code' => 400, 'msg' => '参数错误'];
            echo json_encode($res);die;
        }
        //处理数据
        \app\home\logic\CartLogic::changeNum($params['id'], $params['number']);
        //返回数据
        $res = ['code' => 200, 'msg' => 'success'];
        echo json_encode($res);die;
    }

    /**
     * ajax删除购物记录
     */
    public function delcart()
    {
        //接收参数
        $params = input();
        //参数检测
        /*$validate = $this->validate($params, [
            'id' => 'require'
        ]);
        if($validate !== true){
            $res = ['code' => 400, 'msg' => $validate];
            echo json_encode($res);die;
        }*/

        if(!isset($params['id']) || empty($params['id'])){
            $res = ['code' => 400, 'msg' => '参数错误'];
            echo json_encode($res);die;
        }
        //处理数据
        \app\home\logic\CartLogic::delCart($params['id']);
        //返回数据
        $res = ['code' => 200, 'msg' => 'success'];
        echo json_encode($res);die;
    }

    /**
     * ajax修改选中状态
     */
    public function changestatus()
    {
        //接收参数
        $params = input();
        //参数检测
        $validate = $this->validate($params, [
            'id' => 'require',
            'status' => 'require|in:0,1'
        ]);
        if($validate !== true){
            $res = ['code' => 400, 'msg' => $validate];
            echo json_encode($res);die;
        }
        //处理数据
        \app\home\logic\CartLogic::changeStatus($params['id'], $params['status']);
        //返回数据
        $res = ['code' => 200, 'msg' => 'success'];
        echo json_encode($res);die;
    }
}


//逻辑层

    public static function getAllCart()
    {
        //判登录断用户是否
        if (session('?uid')) {
            $user_id = session('uid.id');
            $data = \app\home\model\Cart::where('user_id', $user_id)->select();//将列表展示
            return $data->toArray();
        } else {
            $cart = \cookie('cart')?:[];
//            dd($cart);
            if (empty($cart)) {
                return [];
            }
            $cart_data = unserialize($cart);
//            dd($cart_data);
            return array_values($cart_data);
        }

    }

    public static function addCart($goods_id, $spec_goods_id, $number, $is_selected)
    {
        if (session('?uid.id')) {
            $user_id = session('uid.id');
//            如果登录
            $data = \app\home\model\Cart::where('goods_id', $goods_id)
                ->where('spec_goods_id', $spec_goods_id)
                ->where('user_id', $user_id)
                ->find();
            if (!$data) {
//                   找到相同的数据
                $cart_arr = [
                    'number' => $number,
                    'is_selected' => $is_selected,
                    'spec_goods_id' => $spec_goods_id,
                    'goods_id' => $goods_id,
                    'user_id' => $user_id,
                ];
                $goods = \app\home\model\Cart::create($cart_arr);
                return $goods;
            } else {
                $cart_data['number'] = $data['number'] + $number;
                \app\home\model\Cart::update($cart_data, ['id' => $data['id']]);
                return $data;
            }

        } else {
//            未登录
//            取出cookie 如果是第一次在浏览器上加购商品是数组；
            //如果不是取出cookie值进行反序列hua；
            $cart = \cookie('cart') ?: [];
//            拼接$key
            $key = $goods_id . '_' . $spec_goods_id;

            if (is_array($cart)) {
                $cart[$key]= [
                    'number' => $number,
                    'is_selected' => $is_selected,
                    'spec_goods_id' => $spec_goods_id,
                    'goods_id' => $goods_id,
                ];
                \cookie('cart', serialize($cart));
            }
            $cart_arr = unserialize($cart);
//            dd($cart_arr);
            if (isset($cart_arr[$key])) {
//                如果存在键 数量加一
                $cart_arr[$key]['number']+= $number;
                \cookie('cart', serialize($cart_arr));
//                dd($cart_arr);
            } else {
                $cart_arr[$key] = [
                    'number' => $number,
         
              'is_selected' => $is_selected,
                    'spec_goods_id' => $spec_goods_id,
                    'goods_id' => $goods_id,
                ];
            }
            \cookie('cart', serialize($cart_arr));
            return array_values($cart_arr);
        }
    }

//    cookie中取出数据
   static function getCookie()
    {
        //如果不是取出cookie值进行反序列hua；
            $cart = \cookie('cart') ?: [];
            if(empty($cart)){
                return [];
            }
        $cart_arr = unserialize($cart);
          foreach ($cart_arr as &$v){
             self::addCart($v['goods_id'],$v['spec_goods_id'],$v['number'],$v['is_selected']);
          }
          unset($val);
          \cookie('cart',null);

    }

//model层
    //获取商品以及sku信息
    public static function getGoodsWithSpec($spec_goods_id, $goods_id)
    {
        //如果有sku的id， 就以之作为查询条件
        if($spec_goods_id){
            //有sku，且有多个，需要根据sku的id取指定的一个
            $where = ['t2.id'=>$spec_goods_id];
        }else{
            //没有sku， 就根据商品id查询，sku相关的字段都是null
            $where = ['t1.id' => $goods_id];
        }
        //如果没有，就以商品id作为查询条件
        $goods = self::alias('t1')
            ->join('pyg_spec_goods t2', 't1.id=t2.goods_id', 'left')
            ->field('t1.*, t2.value_ids, t2.value_names, t2.price, t2.cost_price as cost_price2, t2.store_count')
            ->where($where)
            ->find();
//        //如果sku信息中，price  cost_price 大于0，则覆盖商品信息中的对应字段
        if($goods['price'] > 0){
            $goods['goods_price'] = $goods['price'];
        }
        if($goods['cost_price2'] > 0){
            $goods['cost_price'] = $goods['cost_price2'];
        }
        return $goods;
    }

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