How to develop an online reservation system using PHP and CGI

How to use PHP and CGI to develop an online reservation system

Introduction:
In recent years, with the popularization of the Internet, more and more companies have begun to transform to the Internet and conduct online business. Online booking systems have become the first choice for many businesses. This article will introduce how to use PHP and CGI to develop a simple online reservation system. By studying this article, readers will learn how to use PHP and CGI for development, as well as related code examples.

1. Requirements Analysis
Before starting development, we need to conduct a requirements analysis to clarify the functions and characteristics of the system. In this reservation system, we need to implement the following functions:

1. User registration and login function: Users can log in by registering an account and manage personal information.
2. Product list display: The system needs to display the pre-orderable products to the user.
3. Product reservation: Users can select products and make reservations.
4. Order management: Users can view their orders and perform operations such as cancellation.
5. Administrator background: Administrators can manage product and order information.

2. System design and implementation

1. Database design
   In order to store user, product and order information, we need to design related database tables. In this system, we have designed the following tables:
   1) User table: stores the user's basic information, such as user name, password, email, etc.
   2) Product table: stores detailed information of products, such as product name, price, inventory, etc.
   3) Order table: stores order details, such as order number, product number, user number, etc.
2. Front-end design
   The design of the front-end page is the interface for users to interact with the system. The front-end design of this system can be implemented using HTML, CSS and JavaScript technologies. In the front-end design, we need to implement user registration, login page, product list page, order management page, etc.
3. Backend development
   Backend development uses PHP language and CGI modules. The PHP language is used to handle interaction with the database and the implementation of business logic, and the CGI module is used to exchange data with the front end. Here are some code examples:

(1) Implementation of user registration and login functions

//注册功能
function register($username, $password, $email){
    //将用户信息插入用户表
    //...
    return true;
}

//登录功能
function login($username, $password){
    //根据用户名和密码查询用户表，验证用户是否存在
    //...
    return true;
}

(2) Implementation of product list display and reservation functions

//展示商品列表
function showProductList(){
    //查询商品表，获取商品列表信息
    //...
    return $productList;
}

//商品预订功能
function makeReservation($productId, $userId){
    //判断商品库存是否足够
    //...
    //生成订单并插入订单表
    //...
    return true;
}

(3) Implementation of the order management function

//查看订单列表
function getOrderList($userId){
    //根据用户编号查询订单表，获取订单列表信息
    //...
    return $orderList;
}

//取消订单功能
function cancelOrder($orderId){
    //根据订单编号更新订单状态
    //...
    return true;
}

(4) Implementation of the administrator backend
The administrator backend can be developed using the same technology and needs to implement product management and order management functions. The code example is similar to the above and will not be repeated.

3. System Testing and Deployment
After completing the development, we need to test the system to ensure that the system's functions and performance meet the needs. Testing includes unit testing and overall testing. After the test passes, we can deploy the system to the server for user access.

Conclusion:
This article introduces how to use PHP and CGI to develop a simple online reservation system. By studying this article, readers can learn about system requirements analysis, system design and implementation, and system testing and deployment. I hope this article will be helpful to readers in developing online reservation systems.

Reference materials:
[1] Liao Xuefeng. PHP tutorial [EB/OL]. [2019-10-31]. https://www.liaoxuefeng.com/wiki/1016959663602400

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