How to use PHP to develop an online store that supports coupons

How to use PHP to develop an online mall that supports coupons

With the rapid development of e-commerce, more and more people choose to shop online. In order to attract more users and increase sales, many online malls provide coupon functions. This article will introduce how to use PHP to develop an online mall that supports coupons.

1. Requirements Analysis
Before starting development, we need to determine the functional requirements of the mall. Generally, an online mall that supports coupons should include the following functions:

1. User registration and login: Users can use the mall by registering an account and authenticating through the login function.
2. Product browsing and purchasing: Users can browse products on the mall and select the products they need to purchase to place an order.
3. Coupon management: The mall administrator can manage coupons, including creating coupons, setting the coupon validity period and discount amount, etc.
4. Use of coupons: Users can use coupons to enjoy discounts when purchasing goods.
5. Order management: The mall administrator can view and manage users' orders.

2. Technology selection
In development, we chose to use the PHP programming language as the back-end development language. PHP is a popular open source scripting language for rapid development of web applications. In addition, we also need to use HTML, CSS and JavaScript to implement the front-end interface. The database selects MySQL as the storage system.

3. Database design
Before we start writing code, we need to design the database model first. In this case, we need to create the following database tables:

1. User table (users): stores basic information of users, such as user name, password, email, etc.
2. Product table (products): stores basic information of products, such as product name, price, inventory, etc.
3. Coupon table (coupons): stores basic information of coupons, such as coupon code, validity period, discount amount, etc.
4. Order table (orders): stores the user's order information, including order number, user ID, product ID, quantity, total price, etc.

4. Development process

1. Create database: Create a database named "online_store" in MySQL, and create the above table structures respectively.
2. Writing user registration and login functions: Create a file named "register.php" for user registration, and another file named "login.php" for user login. On the registration page, users need to fill in user name, password, email and other information, and save the registration information to the user table. On the login page, users need to enter their username and password for identity verification. If the verification is passed, they will jump to the mall homepage.
3. Writing product browsing and purchasing functions: Create a file named "index.php" as the homepage of the mall. On this page, we will display all product information and provide a purchase button. When the user clicks the buy button, a dialog box will pop up asking the user to enter the coupon code (if any) and then save the order information to the order table.
4. Writing coupon management function: Create a file named "admin.php" for coupon management. On this page, the mall administrator can add, edit, and delete coupons. The administrator can set the validity period, discount amount and other information of the coupon and save it to the coupon table.
5. Writing coupon usage function: When purchasing goods, you need to add a function to check coupons. When the user enters the coupon code, the backend will query the coupon table to check the validity of the coupon. If the coupon is valid, the discount amount is calculated into the total order price.
6. Write order management function: Create a file named "orders.php" for order management. On this page, the mall administrator can view the user's order information, including order number, user ID, product ID, quantity, total price, etc.

5. Testing and Deployment
After writing the code, we need to test and deploy. In a local testing environment, you can use software such as XAMPP or WAMP to simulate the server environment. After deploying the code to the server, the online mall can be accessed via domain name or IP address.

6. Summary
This article introduces how to use PHP to develop an online mall that supports coupons. By designing a database model and writing functions such as registration, login, product browsing, purchase and coupon management, we can build a complete online mall system and support the use of coupons. Of course, this is just a basic application case, and developers can expand and optimize functions according to actual needs.

Reference materials:

1. PHP official website: http://php.net/
2. MySQL official website: https://www.mysql.com/
3. W3School: https://www.w3schools.com/

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