How to use PHP to develop the shopping list function of WeChat applet?

How to use PHP to develop the shopping list function of WeChat applet?

With the rapid development of mobile Internet, WeChat mini programs have become one of the indispensable tools in many people’s daily lives. The shopping list function is one of the common and practical functions in mini programs. This article will introduce how to use PHP to develop the shopping list function of WeChat applet and provide specific code examples.

1. Preparation work

Before we start, we need to prepare the following work:

1. WeChat developer tools: used to develop and debug the integration of WeChat applets development environment.
2. PHP environment: used to realize background data interaction and processing.

2. Design database

The shopping list function needs to save the user’s shopping information, so we need to design the corresponding database. Suppose we need to save the following information:

1. User information: including user ID, user name, etc.
2. Product information: including product ID, product name, price, etc.
3. Shopping cart information: including shopping cart ID, user ID, product ID, quantity, etc.

Relational databases such as MySQL can be used to store this information.

3. Implement the backend interface

1. Write an interface to obtain a product list

On the server side, we need to write an interface to obtain a product list for small users Program call. You can use PHP to write an interface to return data to the applet in JSON format. The following is a simplified example:

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "dbname";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 查询商品列表
$sql = "SELECT * FROM products";
$result = $conn->query($sql);
$products = array();
if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        $products[] = $row;
    }
}

// 返回结果
echo json_encode($products);
$conn->close();
?>

2. Write an interface for adding products to the shopping cart

On the server side, we also need to write an interface for adding products to the shopping cart, For small programs to call. Also use PHP to write an interface to store data in the database. The following is a simplified example:

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "dbname";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 获取参数
$user_id = $_POST['user_id'];
$product_id = $_POST['product_id'];
$quantity = $_POST['quantity'];

// 添加商品到购物车
$sql = "INSERT INTO shopping_cart (user_id, product_id, quantity) VALUES ('$user_id', '$product_id', '$quantity')";
if ($conn->query($sql) === TRUE) {
    echo "添加成功";
} else {
    echo "添加失败";
}

$conn->close();
?>

4. Calling the interface in the mini program

In the mini program, we need to implement the shopping list function by calling the background interface.

1. Get the product list and display it

On the front-end page of the mini program, we can obtain all product information by calling the interface for obtaining the product list provided by the backend. The following is a simplified example:

wx.request({
  url: 'http://localhost/products.php',
  success: function(res) {
    let productList = res.data;
    // 展示商品列表...
  }
})

2. Add items to the shopping cart

On the front-end page of the mini program, we can add items to the shopping cart by calling the backend provided interface to add items to the shopping cart. The following is a simplified example:

wx.request({
  url: 'http://localhost/addToCart.php',
  method: 'POST',
  data: {
    user_id: '123',
    product_id: '456',
    quantity: '1'
  },
  success: function(res) {
    let result = res.data;
    // 处理添加结果...
  }
})

Through the above steps, we can use PHP to develop the shopping list function of the WeChat applet. Of course, based on actual needs and server environment, the code needs to be modified and optimized accordingly. Hope this article helps you!

The above is the detailed content of How to use PHP to develop the shopping list function of WeChat applet?. For more information, please follow other related articles on the PHP Chinese website!