Building a PHP mall: implementing payment and shipping processes

Building a PHP mall: implementing the payment and delivery process

Introduction:
In today's Internet era, e-commerce has become the main way for people to purchase goods. As a powerful and easy-to-learn programming language, PHP is widely used in e-commerce development. This article will introduce in detail how to use PHP to build a simple mall website and implement the payment and delivery process.

Part One: Mall Website Construction
In order to build a mall website, we first need a page that can display product information and a shopping cart function. The following is a simple PHP code example:

<?php
// 获取商品数据
$products = [
    ['id' => 1, 'name' => '商品1', 'price' => 100],
    ['id' => 2, 'name' => '商品2', 'price' => 200],
    ['id' => 3, 'name' => '商品3', 'price' => 300]
];

// 展示商品列表
foreach ($products as $product) {
    echo "商品名称：" . $product['name'] . "，价格：" . $product['price'] . "元 <a href='cart.php?action=add&id=" . $product['id'] . "'>加入购物车</a><br>";
}

// 购物车页面（cart.php）
session_start();

if (isset($_GET['action']) && $_GET['action'] == 'add' && isset($_GET['id'])) {
    $productId = $_GET['id'];
    $_SESSION['cart'][] = $productId;
}

echo "<a href='checkout.php'>去结算</a>";

In the above code, we first define an array $products containing product information. Then use a foreach loop to display the product information and provide the "add to shopping cart" function. It should be noted that in order to implement the shopping cart function, we use session to save the user's shopping cart data.

Part 2: Payment Process
After the user completes the selection of the product, the payment function needs to be implemented so that the user can pay for the order. We can use third-party payment platforms such as Alipay or WeChat Pay to implement payment functions. The following is a code example for payment using Alipay:

<?php
// 支付页面（checkout.php）
session_start();

$orderId = uniqid(); // 生成订单号

// 将订单信息存储到数据库中
// ...

$totalPrice = 0;
foreach ($_SESSION['cart'] as $productId) {
    // 查询商品信息
    $product = getProductById($productId);
    // 计算总价
    $totalPrice += $product['price'];
}

// 调用支付宝接口进行支付
$payUrl = 'https://api.alipay.com/pay';
$redirectUrl = urlencode('http://www.example.com/payment_result.php?order_id=' . $orderId);
$paymentUrl = $payUrl . '?total_price=' . $totalPrice . '&redirect_url=' . $redirectUrl;

echo "<a href='$paymentUrl'>支付订单</a>";

In the above code, we first generate a unique order number and store the order information into the database. Then, by looping through the items in the shopping cart, the total price of the order is calculated. Finally, the payment URL is generated, and the user clicks on the URL to jump to the payment page for payment.

Part 3: Shipping Process
After the user completes the payment, the merchant needs to ship the product to the user. The following is a code example of a simple shipping process:

<?php
// 支付结果页（payment_result.php）
$orderId = $_GET['order_id'];

// 根据订单号查询订单信息
$order = getOrderById($orderId);

if ($order['status'] == 'paid') {
    // 发货操作
    $shippingCompany = '顺丰快递';
    $shippingNumber = 'SF' . uniqid();
    // 更新订单状态为“已发货”
    updateOrderStatus($orderId, 'shipped');
    echo "已发货，物流公司：" . $shippingCompany . "，快递单号：" . $shippingNumber;
} else {
    echo "支付未完成，无法发货";
}

In the above code, we first query the order information based on the order number and determine the payment status. If the order status is "Paid", the shipment operation is performed and the order status is updated to "Shipping". Otherwise, it will prompt that the payment has not been completed and the goods cannot be shipped.

Conclusion:
Through the above code examples, we successfully built a shopping mall website using PHP and implemented the payment and delivery process. Of course, this is just a simple example, and issues such as security and user experience also need to be considered in actual development. I hope this article can be helpful to everyone in building a PHP mall and implementing the payment and shipping process.

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