yii2 实现购物车功能

1.商品列表中点击加入购物车，则跳转到购物车列表，效果如图所示：

视图代码goods/list.php中。代码如下：

<?php echo Html::a(' 加入购物车',['cart','id'=>$info['goods_id']])?>

控制器GoodsController.php中，开启session.

use yii/web/Session;$session = new Session;$session->open();

/** * 加入购物车 */public function actionCart($id){ //获取添加到购物车的商品的信息 $goods_model=new Goods(); $good_info=$goods_model->findOne($id); //信息为空或者数量<0,则不存在要购买的商品,否则把要购买的商品添加到session中 if(empty($good_info) || count($good_info)<0){exit("No Goods"); }else{$good_info['num']=1;//判断购物车中是否已经存在该商品，存在的话数量叠加，if(isset($_SESSION["shoplist"][$good_info['goods_id']])){ //若存在数量叠加 $num=$_SESSION["shoplist"][$good_info['goods_id']]['num']; $num++; $_SESSION["shoplist"][$good_info['goods_id']]['num']=$num; //$_SESSION["shoplist"][$good_info['goods_id']]['num'] ++;}else{ //若不存在，作为新购买的商品添加到购物车中 $_SESSION["shoplist"][$good_info['goods_id']]=$good_info;}// $_SESSION['shoplist'][]=$good_info;return $this->redirect('./index.php?r=cart/list'); }}

2.购物车列表页：

use yii/web/Session;$session = new Session;$session->open();

/** * 购物车列表 */public function actionList(){ $cart_list=$_SESSION['shoplist']; return $this->render('list',['cart_list'=>$cart_list]);}

3.删除购物车中的商品和清空购物车

视图cart/list.php中<?php echo Html::a('删除',['delete','id'=>$info['goods_id']],['onclick'=> 'return confirm("Confirm to delete?")'])?>

控制器CartController.php中/** * 购物车中的单一商品删除 */public function actionDelete(){ $cart_list=$_SESSION['shoplist'];//判断是删除一个商品还是请空购物车 if($_GET['id']){//从session中删除指定的商品信息unset($_SESSION["shoplist"][$_GET['id']]); }else{//清空session中商品,清空购物车unset($_SESSION["shoplist"]); } return $this->redirect("./index.php?r=cart/list");}