Shopping cart deletion and emptying function

1. The function of canceling the product is as follows:

a Tag add link:

<a href="shoppingcart. php?a=delone&key=<?php echo $key ?>" onclick="">Cancel</a>

if judgement, add one more :

<?php
//取消购物车里的一件商品
elseif($a=="delone"){
    $key=$_GET["key"];
    $shoppingcart=unserialize($_COOKIE["shoppingcart"]);
    unset($shoppingcart[$key]);
    if(empty($_COOKIE)){
        setcookie($shoppingcart,"",time()-3600);
    }else{
        setcookie("shoppingcart",serialize($shoppingcart));
    }
    header("location:shoppingcart.php");
    exit();
}

To cancel an item, you only need to unset the corresponding key value

2, clear shopping cart function

Add a tag to send get request:

<a href="shoppingcart.php?a=empty">Clear Shopping cart</a>

If add one more to the judgment:

<?php
//清空购物车
elseif($a=="empty"){
    //清除整个cookie保存的商品信息
    unset($_COOKIE["shoppingcart"]);
    setcookie("shoppingcart","",time()-3600);
    echo "<div class='shoppingcartempty'>您的购物车目前没有商品！3秒后跳回首页......</div>";
    header("Refresh:3;url=goods.php");
}

3, the effect is shown below