How to use PHP to develop a high-concurrency flash sale system

How to use PHP to develop a high-concurrency flash sale system

With the rapid development of e-commerce, flash sale activities have become an important means for major e-commerce platforms to attract consumers. However, high concurrent access places extremely high demands on the performance and affordability of the website. In this article, we will introduce how to use PHP language to develop a high-concurrency flash sale system and provide some specific code examples.

1. System architecture design

When designing a high-concurrency flash sale system, the following aspects need to be considered:

1. Database design: flash sale product information should be stored in In the database, query efficiency can be improved through indexes. At the same time, in order to avoid high pressure on the database, you can consider using caching technology, such as Redis.
2. Front-end optimization: Through CDN technology, static resources are distributed to various nodes around the world to speed up user access and reduce the load on the back-end server.
3. Load balancing: Use load balancing technology to evenly distribute user requests to multiple servers to improve the system's concurrent processing capabilities.

2. Code implementation

The following is a code example of a high-concurrency flash sale system implemented in PHP language:

1. Database design

First, create a database named "seckill" and create a table named "goods" to store information about flash sale products. Fields in the table include "id", "name", "stock", and "create_time".

CREATE DATABASE seckill;
USE seckill;
CREATE TABLE goods (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(50) NOT NULL,
    stock INT DEFAULT 0,
    create_time DATETIME
);

2. Product list page

Create a file named "index.php" to display the list of flash sale products. In the page, use PHP code to get the product list from the database and display it.

<?php
$link = mysqli_connect("localhost", "root", "password", "seckill");
$result = mysqli_query($link, "SELECT * FROM goods");
while ($row = mysqli_fetch_assoc($result)) {
    echo "<p>商品名称：" . $row["name"] . "</p>";
    echo "<p>库存数量：" . $row["stock"] . "</p>";
    echo "<a href='seckill.php?id=" . $row["id"] . "'>秒杀</a>";
}
?>

3. Seckill interface

Create a file named "seckill.php" to process users' seckill requests. During the processing, it is first necessary to determine whether the inventory of the product is sufficient. If it is insufficient, the information of flash sale failure will be returned; if it is sufficient, the inventory quantity of the product in the database will be modified, and the information of flash sale success will be returned.

<?php
$link = mysqli_connect("localhost", "root", "password", "seckill");

$id = $_GET["id"];

// 判断商品的库存是否足够
$result = mysqli_query($link, "SELECT * FROM goods WHERE id = $id");
$row = mysqli_fetch_assoc($result);
if ($row["stock"] <= 0) {
    echo "秒杀失败，商品库存不足";
    return;
}

// 修改商品的库存数量
mysqli_query($link, "UPDATE goods SET stock = stock - 1 WHERE id = $id");

echo "秒杀成功";
?>

3. System performance test

In order to verify the performance and concurrent processing capabilities of the system, we can use tools such as Apache JMeter to conduct stress testing. By adjusting the number of concurrent threads and request frequency, observe the server's response time and success rate, and evaluate the performance limits of the system.

Summary:

The above are some basic ideas and sample codes for developing a high-concurrency flash sale system using PHP language. Of course, actual applications also need to be optimized and improved according to specific circumstances. I hope this article will be helpful to everyone in developing a high-concurrency flash sale system!

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