PHP mall development skills: Designing shopping cart and order management systems

PHP mall development skills: Designing a shopping cart and order management system

In the development process of a complete PHP mall, the shopping cart and order management system are very important components. The shopping cart is used to allow users to add and manage their purchased items, while the order management system is used to process and track users' orders. Here are some tips for designing a shopping cart and order management system, along with code examples.

1. Design the shopping cart system

1. Database design

When starting, you first need to design the shopping cart database structure. You can create a data table named "cart", which contains the following fields:

• cart_id: Shopping cart ID (primary key)
• user_id: User ID, used to communicate with the user Association
• product_id: Product ID, used to associate with the product
• quantity: Product quantity
• created_at: Creation time
• updated_at: Update time

2. Add items to the shopping cart

When the user chooses to purchase an item, the item can be added to the shopping cart through the following code:

<?php
session_start();

// 创建购物车数组
if(!isset($_SESSION['cart'])){
    $_SESSION['cart'] = array();
}

// 获取商品详情（这里的商品信息可以从数据库查询得到）
$product_id = $_POST['product_id'];
$product_name = 'Test Product';
$product_price = 10.00;

// 将商品添加到购物车数组
$item = array(
    'product_id' => $product_id,
    'product_name' => $product_name,
    'product_price' => $product_price,
    'quantity' => 1
);
array_push($_SESSION['cart'], $item);
?>

3. Shopping cart page display

When users browse the shopping cart, they can display the list of products in the shopping cart and the total price of the shopping cart through the following code:

<?php
session_start();

// 获取购物车中的商品列表
$cart = $_SESSION['cart'];

// 展示购物车中的商品列表
foreach($cart as $item){
    echo $item['product_name'].' - '.$item['product_price'].'<br>';
}

// 计算购物车总价
$total_price = 0;
foreach($cart as $item){
    $total_price += $item['product_price'] * $item['quantity'];
}

echo 'Total Price: '.$total_price;
?>

4. Delete items in the shopping cart

When the user wants to delete an item in the shopping cart, he or she can use the following code:

<?php
session_start();

// 获取要删除的商品ID
$product_id = $_POST['product_id'];

// 查找并删除购物车中的对应商品
foreach($_SESSION['cart'] as $key => $item) {
    if($item['product_id'] == $product_id) {
        unset($_SESSION['cart'][$key]);
        break;
    }
}
?>

2. Design order management system

1. Database design

In the order management system, the database structure also needs to be designed. You can create a data table named "orders", which contains the following fields:

• order_id: order ID (primary key)
• user_id: user ID, used to associate with the user
• total_price: total order price
• created_at: creation time
• updated_at: update time

2. Create order

After the user confirms the purchase of goods, the order information can be inserted into the order management database through the following code:

<?php
session_start();

// 获取用户ID和订单总价
$user_id = 1; // 这里假设用户ID为1
$total_price = $_POST['total_price'];

// 将订单信息插入到数据库
$conn = mysqli_connect('localhost', 'username', 'password', 'database_name');
$sql = "INSERT INTO orders (user_id, total_price) VALUES ('$user_id', '$total_price')";
mysqli_query($conn, $sql);

// 清空购物车
unset($_SESSION['cart']);
?>

3. View the order

The user can use the following code Code to view all your orders:

<?php
session_start();

// 获取用户ID
$user_id = 1; // 这里假设用户ID为1

// 查询数据库中与该用户相关的订单
$conn = mysqli_connect('localhost', 'username', 'password', 'database_name');
$sql = "SELECT * FROM orders WHERE user_id = '$user_id'";
$result = mysqli_query($conn, $sql);

// 展示用户的所有订单
while($row = mysqli_fetch_assoc($result)){
    echo 'Order ID: '.$row['order_id'].' - Total Price: '.$row['total_price'].'<br>';
}
?>

The above are some tips and code examples for designing shopping cart and order management systems in PHP mall development. I hope this helps you, and I wish you success in developing your mall!

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