我目前正在研究购物车系统。它需要用户登录才能访问购物车。所以我写了一些代码来禁止用户未登录时访问购物车页面。但是，每当我尝试清空购物车时，我都会被注销。我只想销毁购物车 session 而不是用户 session 。这是我的代码:
对于购物车页面:
<?php
session_start();
if(isset($_SESSION['userID'])){
}
elseif(!isset($_SESSION['userID'])){
echo
"<script>
alert('You must be logged in.');
window.location.href='index.php#login'
</script>";
}
?>
<?php
include ('../import/layout.php');
?>
<body>
<div class="site-wrapper" id="index">
<div class="site-wrapper-inner">
<div class="cover-container">
<?php
include ('../import/nav-two.php');
?>
<!-- <div class="inner cover">
</div>
<div class="mastfoot">
<div class="inner">
<p>© 2015 Aroma Chicken House Restaurant, All Rights Reserved.
<a class="menu-item pull-right" href="#index">Back to Top</a>
</p>
</div>
</div> -->
</div>
<div id="cart">
<div class="container">
<?php
include ('../cart/index.php');
?>
</div>
</div>
</div>
</div>
</body>
对于购物车更新:
<?php
session_start();
include_once("config/config.php");
//empty cart by distroying current session
if(isset($_GET["emptycart"]) && $_GET["emptycart"]==1)
{
$return_url = base64_decode($_GET["return_url"]); //return url
session_destroy();
header('Location:'.$return_url);
}
//add item in shopping cart
if(isset($_POST["type"]) && $_POST["type"]=='add')
{
$product_code = filter_var($_POST["product_code"], FILTER_SANITIZE_STRING); //product code
$product_qty = filter_var($_POST["product_qty"], FILTER_SANITIZE_NUMBER_INT); //product code
$return_url = base64_decode($_POST["return_url"]); //return url
//MySqli query - get details of item from db using product code
$results = $mysqli->query("SELECT product_name,price FROM products WHERE product_code='$product_code' LIMIT 1");
$obj = $results->fetch_object();
if ($results) { //we have the product info
//prepare array for the session variable
$new_product = array(array('name'=>$obj->product_name, 'code'=>$product_code, 'qty'=>$product_qty, 'price'=>$obj->price));
if(isset($_SESSION["products"])) //if we have the session
{
$found = false; //set found item to false
foreach ($_SESSION["products"] as $cart_itm) //loop through session array
{
if($cart_itm["code"] == $product_code){ //the item exist in array
$product[] = array('name'=>$cart_itm["name"], 'code'=>$cart_itm["code"], 'qty'=>$product_qty, 'price'=>$cart_itm["price"]);
$found = true;
}else{
//item doesn't exist in the list, just retrive old info and prepare array for session var
$product[] = array('name'=>$cart_itm["name"], 'code'=>$cart_itm["code"], 'qty'=>$cart_itm["qty"], 'price'=>$cart_itm["price"]);
}
}
if($found == false) //we didn't find item in array
{
//add new user item in array
$_SESSION["products"] = array_merge($product, $new_product);
}else{
//found user item in array list, and increased the quantity
$_SESSION["products"] = $product;
}
}else{
//create a new session var if does not exist
$_SESSION["products"] = $new_product;
}
}
//redirect back to original page
header('Location:'.$return_url);
}
//remove item from shopping cart
if(isset($_GET["removep"]) && isset($_GET["return_url"]) && isset($_SESSION["products"]))
{
$product_code = $_GET["removep"]; //get the product code to remove
$return_url = base64_decode($_GET["return_url"]); //get return url
foreach ($_SESSION["products"] as $cart_itm) //loop through session array var
{
if($cart_itm["code"]!=$product_code){ //item does,t exist in the list
$product[] = array('name'=>$cart_itm["name"], 'code'=>$cart_itm["code"], 'qty'=>$cart_itm["qty"], 'price'=>$cart_itm["price"]);
}
//create a new product list for cart
$_SESSION["products"] = $product;
}
//redirect back to original page
header('Location:'.$return_url);
}
?>
最佳答案
关于
unset($_SESSION["products"])
而不是
session_destroy()
每个用户只有一个 session 。所以没有办法销毁“特定” session 。您可以做的是删除负责显示购物车的 session 内容(如上所示)。
关于php - 如何销毁 PHP 中的特定 session 变量？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28602173/