search
HomeBackend DevelopmentPHP TutorialApplication scenarios of queue message persistence and message deduplication in PHP and MySQL

Application scenarios of queue message persistence and message deduplication in PHP and MySQL

Application scenarios of queue message persistence and message deduplication in PHP and MySQL

Queue is a common data structure that is widely used in software development Applied to asynchronous message processing, task scheduling, log collection and other scenarios. Among them, message persistence and message deduplication are two important features of the queue, which can ensure message reliability and data consistency. In PHP and MySQL, queue applications can use Redis as the message middleware and MySQL to store and manage queue metadata. Specific examples are as follows.

First, you need to install and configure Redis and MySQL to support queue operations. We assume that the installation and configuration of Redis and MySQL have been completed, and the Redis and MySQL extensions have been installed in PHP.

The following is a code example that uses PHP and Redis to implement a queue:

<?php

// 链接Redis
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

// 将消息插入队列
$redis->rpush('queue', 'message1');
$redis->rpush('queue', 'message2');
$redis->rpush('queue', 'message3');

// 从队列中读取消息
$message = $redis->lpop('queue');
while ($message) {
    echo $message . PHP_EOL;
    $message = $redis->lpop('queue');
}
?>

In the above code, we use the rpush method of Redis to insert the message into the end of the queue, and use the lpop method to remove the message from the queue. Read the message at the head of the queue and read through the loop until the queue is empty.

Next, we need to use MySQL to achieve message persistence and deduplication. First, create a table to store the metadata of the message, including fields such as message ID and processing status.

CREATE TABLE `queue` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `message` varchar(255) DEFAULT NULL,
  `status` tinyint(1) DEFAULT '0',
  PRIMARY KEY (`id`),
  UNIQUE KEY `message` (`message`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Then, we can write PHP code to persist the message into MySQL, and perform deduplication judgment before inserting to prevent repeated insertion of the same message.

<?php

// 链接MySQL
$mysqli = new mysqli('localhost', 'root', 'password', 'database');

// 将消息插入队列
$message = 'message1';
$exists = $mysqli->query("SELECT * FROM queue WHERE message = '$message'");
if ($exists->num_rows == 0) {
    $mysqli->query("INSERT INTO queue (message) VALUES ('$message')");
}

// 从队列中读取消息
$result = $mysqli->query("SELECT * FROM queue WHERE status = 0");
while ($row = $result->fetch_assoc()) {
    echo $row['message'] . PHP_EOL;
    
    // 标记消息为已处理
    $id = $row['id'];
    $mysqli->query("UPDATE queue SET status = 1 WHERE id = $id");
}

// 关闭连接
$mysqli->close();
?>

In the above code, we use the mysqli extension to connect to the MySQL database and determine whether the message already exists in the queue through query. If it does not exist, the message is inserted into the queue. When reading messages, we query for unprocessed messages and read each message through a loop and mark its status as processed.

In summary, queue message persistence and message deduplication are commonly used technologies in development, which can ensure message reliability and data consistency. This article introduces code examples for using PHP and Redis to implement queues, and combines them with MySQL to achieve message persistence and deduplication. I hope this article can help you understand the application scenarios and implementation methods of queues.

The above is the detailed content of Application scenarios of queue message persistence and message deduplication in PHP and MySQL. 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
The Continued Use of PHP: Reasons for Its EnduranceThe Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesPHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages ​​that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedPHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryPHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideChoosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguagePHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondPHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values ​​and handle functions that may return null values.

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

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Tools

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.

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool