Create a file top_products.php that can be included anywhere on your site:
?>
: If a minor, unfamiliar shopping site shows highly exposed parameters like checkout.php?id=123 without clear branding or clean design, proceed with extreme caution. Your data might not be securely handled.
: In poorly designed carts, changing the id in the URL might allow a user to manipulate prices or quantities during the checkout process.
// 安全的写法2：使用参数化查询（推荐） $stmt = $mysqli->prepare("SELECT * FROM products WHERE id = ?"); $stmt->bind_param("i", $id); $stmt->execute(); php id 1 shopping top
// 生成签名 $signature = hash_hmac('sha256', $user_id . '|' . $timestamp, $secret_key);
// Cast the input directly to an integer $id = (int)$_GET['id']; Use code with caution. 3. Implement Strict Access Controls
?>
else $error = "Invalid product ID.";
session_start(); if (isset($_GET['id'])) $id = $_GET['id']; $_SESSION['cart'][] = $id; // Adding item to cart Use code with caution. 3. Creating a Top-Tier PHP Shopping System
<?php $category_id = 1; // "Top" category as per keyword
If your id parameter must be a number, force the variable to be an integer the moment the script receives it. This strips away any malicious text scripts an attacker might try to inject.
The “Add to Cart” form uses a simple POST request. Without CSRF protection, a malicious site could force a user’s browser to add items to their cart. Add a CSRF token to the form and validate it in cart.php . Create a file top_products
.price color: #d9534f; font-size: 24px; font-weight: bold; </style> </head> <body> <h1>Featured Top Item</h1>
-- Products table CREATE TABLE products ( id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255), category_id INT, price DECIMAL(10,2), sales_count INT DEFAULT 0 );
// 判断购物车中是否已有该商品，有则累加数量 if (isset($_SESSION['cart'][$product['id']])) $_SESSION['cart'][$product['id']]['num']++; else $_SESSION['cart'][$product['id']] = $product;