search
HomeBackend DevelopmentPHP TutorialHow to build a caching proxy server using PHP and REDIS

How to build a cache proxy server using PHP and Redis

Caching is a technology that effectively improves system performance. In web development, using a caching proxy server is a common optimization method. This article will introduce how to build a caching proxy server using PHP and Redis, with code examples.

  1. Installing and configuring Redis

First, you need to install Redis on the server. You can install it through the following command:

sudo apt-get install redis-server

After the installation is complete, you need to perform some configuration on Redis. You can edit the /etc/redis/redis.conf file and modify the following two configuration items:

bind 127.0.0.1
maxmemory 128mb

Change the bind configuration item to the IP address of the server, and maxmemory Modify the configuration item to an appropriate value (depending on the memory of the server).

  1. Writing PHP code

Next, let’s write PHP code to implement the function of the caching proxy server. First create a ProxyServer.php file, and then add the following code:

<?php
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

$cacheKey = md5($_SERVER['REQUEST_URI']);

$cachedResponse = $redis->get($cacheKey);

if ($cachedResponse) {
    echo $cachedResponse;
} else {
    // Your original logic here

    // Get the response from the upstream server
    $response = get_response_from_upstream_server();

    // Store the response in Redis with a TTL of 1 hour
    $redis->setex($cacheKey, 3600, $response);

    echo $response;
}
?>

In the above code, we first use the Redis PHP extension to connect to the Redis server. We then calculate a unique cache key $cacheKey based on the currently requested URL. Next, we try to get the cached response from Redis. If it exists, the cached response is returned directly; otherwise, custom logic is executed, the response is obtained from the upstream server, and the response is stored in Redis, setting the expiration time to 1 hour. .

It should be noted that in the above code, get_response_from_upstream_server() is a custom method in which you can write the logic implementation of sending requests to the upstream server and obtaining responses.

  1. Configure the Web server

Finally, modify the configuration file of the Web server (such as Nginx or Apache) to forward the request to the caching proxy server we wrote.

For example, in Nginx, you can add the following code in the nginx.conf file or the corresponding virtual host configuration file:

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://127.0.0.1:8080;
    }
}

In the above code, ## The #proxy_pass directive forwards the request to the caching proxy server, whose address is http://127.0.0.1:8080.

    Test
After completing the above steps, you can access the relevant URL in the browser for testing. On the first visit, the cache proxy server will obtain the response from the upstream server and store it in Redis. Subsequent visits will directly obtain the response from Redis and return it, thus improving the access speed.

Summary

This article introduces how to build a caching proxy server using PHP and Redis. By using a caching proxy server, the performance and response speed of the system can be greatly improved. Hope this article is helpful to you.

Reference link:

    https://redis.io/download
  • https://www.php.net/manual/en/book.redis .php
  • https://nginx.org/

The above is the detailed content of How to build a caching proxy server using PHP and REDIS. 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

Video Face Swap

Video Face Swap

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

Hot Tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

EditPlus Chinese cracked version

EditPlus Chinese cracked version

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

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!