search
HomeBackend DevelopmentPHP TutorialHow to use PHP to develop a simple online ordering function

How to use PHP to develop a simple online ordering function

Sep 21, 2023 am 11:21 AM
PHP development ordering function

How to use PHP to develop a simple online ordering function

How to use PHP to develop a simple online ordering function

With the popularity of the Internet, more and more restaurants have begun to provide online ordering services. With the power and flexibility of the PHP language, it is very practical and interesting to develop a simple online ordering function. This article will introduce how to use PHP to develop a simple online ordering system and provide specific code examples.

1. Database design

Before we start writing code, we need to design a database to store menu information and customer orders. We can use the MySQL database and create two tables to store this information. First, we create a menu table (menu), containing information such as dish names, prices, and descriptions. Secondly, create an order table (orders), including order number, dish name, quantity and total price and other information.

The structure of the menu table is as follows:

CREATE TABLE menu (
  id INT(11) AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(50) NOT NULL,
  price DECIMAL(10,2) NOT NULL,
  description TEXT,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

The structure of the orders table is as follows:

CREATE TABLE orders (
  id INT(11) AUTO_INCREMENT PRIMARY KEY,
  order_number VARCHAR(50) NOT NULL,
  menu_id INT(11) NOT NULL,
  quantity INT(11) NOT NULL,
  total_price DECIMAL(10,2) NOT NULL,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (menu_id) REFERENCES menu(id)
);

2. Create a web interface

Next, we create a simple A web interface to display menus and process customer orders. First, create an index.php file and add the following code in the file:

<!DOCTYPE html>
<html>
<head>
    <title>在线点餐</title>
</head>
<body>
    <h1 id="菜单">菜单</h1>
    
    <?php
        // 连接数据库
        $conn = new mysqli("localhost", "root", "", "restaurant");
        
        // 检查数据库连接是否成功
        if ($conn->connect_error) {
            die("数据库连接失败: " . $conn->connect_error);
        }
        
        // 查询菜单
        $sql = "SELECT * FROM menu";
        $result = $conn->query($sql);
        
        // 显示菜单
        if ($result->num_rows > 0) {
            while ($row = $result->fetch_assoc()) {
                echo "<p>" . $row["name"] . ": $" . $row["price"] . "</p>";
                echo "<p>" . $row["description"] . "</p>";
                echo "<form action='order.php' method='post'>";
                echo "<input type='hidden' name='menu_id' value='" . $row["id"] . "'>";
                echo "<input type='number' name='quantity' min='1' value='1'>";
                echo "<input type='submit' value='加入订单'>";
                echo "</form>";
                echo "<hr>";
            }
        } else {
            echo "暂无菜单";
        }
        
        // 关闭数据库连接
        $conn->close();
    ?>
    
</body>
</html>

In the above code, we first connect to the database and query the menu data. Then, display the menu data on the web page through a loop and provide a join order button for each menu item. After clicking the button, it will jump to the order.php file for processing.

3. Processing Orders

In the order.php file, we process the addition of customer orders and calculate the total price. Add the following code in the file:

<?php
    // 接收菜单ID和数量
    $menu_id = $_POST["menu_id"];
    $quantity = $_POST["quantity"];
    
    // 连接数据库
    $conn = new mysqli("localhost", "root", "", "restaurant");
    
    // 检查数据库连接是否成功
    if ($conn->connect_error) {
        die("数据库连接失败: " . $conn->connect_error);
    }
    
    // 查询菜单
    $sql = "SELECT * FROM menu WHERE id = $menu_id";
    $result = $conn->query($sql);
    
    // 添加订单
    if ($result->num_rows > 0) {
        while ($row = $result->fetch_assoc()) {
            $order_total = $row["price"] * $quantity;
            
            // 生成订单号
            $order_number = "OD" . time();
            
            // 插入订单数据
            $sql = "INSERT INTO orders (order_number, menu_id, quantity, total_price) VALUES ('$order_number', $menu_id, $quantity, $order_total)";
            
            if ($conn->query($sql) === TRUE) {
                echo "订单添加成功";
            } else {
                echo "订单添加失败: " . $conn->error;
            }
        }
    } else {
        echo "菜单不存在";
    }
    
    // 关闭数据库连接
    $conn->close();
?>

In the above code, we first receive the menu ID (menu_id) and quantity (quantity) parameters from the index.php interface. Then, connect to the database and query the prices of the selected menu. Next, we calculate the total order price and generate the order number, and insert the order data into the orders table.

4. Test run

Open the index.php interface in the browser, you can see the menu list and click the Add Order button. After clicking the button, it will jump to the order.php file for processing, and display a message indicating whether the order was added successfully or failed.

Summary

Through the above steps, we successfully developed a simple online ordering function using PHP. Using the powerful functions of PHP and database, we can easily implement the ordering function, and can carry out secondary development and expansion according to needs. When writing such functions, we should pay attention to protecting the security of database connections and processing user input data to ensure the stability and security of the system.

The above is the detailed content of How to use PHP to develop a simple online ordering function. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How do you modify data stored in a PHP session?How do you modify data stored in a PHP session?Apr 27, 2025 am 12:23 AM

TomodifydatainaPHPsession,startthesessionwithsession_start(),thenuse$_SESSIONtoset,modify,orremovevariables.1)Startthesession.2)Setormodifysessionvariablesusing$_SESSION.3)Removevariableswithunset().4)Clearallvariableswithsession_unset().5)Destroythe

Give an example of storing an array in a PHP session.Give an example of storing an array in a PHP session.Apr 27, 2025 am 12:20 AM

Arrays can be stored in PHP sessions. 1. Start the session and use session_start(). 2. Create an array and store it in $_SESSION. 3. Retrieve the array through $_SESSION. 4. Optimize session data to improve performance.

How does garbage collection work for PHP sessions?How does garbage collection work for PHP sessions?Apr 27, 2025 am 12:19 AM

PHP session garbage collection is triggered through a probability mechanism to clean up expired session data. 1) Set the trigger probability and session life cycle in the configuration file; 2) You can use cron tasks to optimize high-load applications; 3) You need to balance the garbage collection frequency and performance to avoid data loss.

How can you trace session activity in PHP?How can you trace session activity in PHP?Apr 27, 2025 am 12:10 AM

Tracking user session activities in PHP is implemented through session management. 1) Use session_start() to start the session. 2) Store and access data through the $_SESSION array. 3) Call session_destroy() to end the session. Session tracking is used for user behavior analysis, security monitoring, and performance optimization.

How can you use a database to store PHP session data?How can you use a database to store PHP session data?Apr 27, 2025 am 12:02 AM

Using databases to store PHP session data can improve performance and scalability. 1) Configure MySQL to store session data: Set up the session processor in php.ini or PHP code. 2) Implement custom session processor: define open, close, read, write and other functions to interact with the database. 3) Optimization and best practices: Use indexing, caching, data compression and distributed storage to improve performance.

Explain the concept of a PHP session in simple terms.Explain the concept of a PHP session in simple terms.Apr 26, 2025 am 12:09 AM

PHPsessionstrackuserdataacrossmultiplepagerequestsusingauniqueIDstoredinacookie.Here'showtomanagethemeffectively:1)Startasessionwithsession_start()andstoredatain$_SESSION.2)RegeneratethesessionIDafterloginwithsession_regenerate_id(true)topreventsessi

How do you loop through all the values stored in a PHP session?How do you loop through all the values stored in a PHP session?Apr 26, 2025 am 12:06 AM

In PHP, iterating through session data can be achieved through the following steps: 1. Start the session using session_start(). 2. Iterate through foreach loop through all key-value pairs in the $_SESSION array. 3. When processing complex data structures, use is_array() or is_object() functions and use print_r() to output detailed information. 4. When optimizing traversal, paging can be used to avoid processing large amounts of data at one time. This will help you manage and use PHP session data more efficiently in your actual project.

Explain how to use sessions for user authentication.Explain how to use sessions for user authentication.Apr 26, 2025 am 12:04 AM

The session realizes user authentication through the server-side state management mechanism. 1) Session creation and generation of unique IDs, 2) IDs are passed through cookies, 3) Server stores and accesses session data through IDs, 4) User authentication and status management are realized, improving application security and user experience.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.