PHP development: Use PHP-PM and RoadRunner to implement PHP process pool and HTTP high-concurrency service

In today's era of rapid development of the Internet, high concurrency has become a problem that every web programmer must face. How to improve the performance and concurrent processing capabilities of PHP applications is an important issue related to user experience and program health and stability. As a commonly used web programming language, PHP's high-concurrency processing methods are also constantly being upgraded and innovated. PHP-PM and RoadRunner are representatives, which can help PHP build process pools and HTTP high-concurrency services.

1. PHP-PM - Fast PHP Process Manager

Currently, Apache and Nginx are the most commonly used PHP servers. However, their architecture has limited support for PHP's concurrent processing capabilities, resulting in the inability to handle highly concurrent HTTP requests. Even in some complex scenarios, PHP process pool technology needs to be used to cope with high performance requirements.

PHP-PM is a fast PHP process manager that can use the ReactPHP library and PHP-FPM for secondary development to realize the function of the PHP process pool. With PHP-PM, each PHP process can handle multiple HTTP requests. This means that the distribution of HTTP requests between different processes can be managed, avoiding the additional time-consuming of PHP-FPM and Apache/Nginx starting a new PHP process each time and then processing the request for it.

The characteristics of PHP-PM are as follows:

1. Supports multi-threading, multiple worker processes can be started based on the php-fpm process, and each worker process can handle multiple HTTPs requests to improve concurrent processing performance.
2. The memory overhead is small. Since PHP files that have been loaded in a PHP-FPM process can be shared, compared with PHP in the Apache/Nginx process model, PHP-PM does not need to load PHP files repeatedly with each request, which reduces the cost. memory overhead.
3. Improve performance, PHP-PM can preload PHP files when starting. Because these files are shared among all worker processes, they do not need to be loaded repeatedly on every request, greatly improving performance.

When using PHP-PM, you need to ensure that PHP is installed and supports PHP-FPM and Composer. In addition, you also need to install the swoole extension.

2. RoadRunner - a super-fast PHP application server

RoadRunner is a super-fast PHP application server. It provides external services in PHP-PM mode and has built-in stronger and more powerful The fast feature allows PHP to process HTTP requests more quickly and efficiently.

The features of RoadRunner are as follows:

1. High performance, compared with similar products, RoadRunner’s performance is even better. Using binaries and optimized PHP-FFI libraries makes RoadRunner start extremely fast, and supports automatic restart, smooth upgrade and other functions.
2. The working mode is flexible and can be adapted to a variety of application scenarios. Examples include HTTP (including PSR-7 and Symfony applications), WebSockets, HTML 5 events, and more.
3. The standardized PHP application deployment method provides a toolbox to ensure that applications can run normally in various environments and has a good entry point to start various PHP applications.

Compared with PHP-PM, RoadRunner supports a wider range of application scenarios. When using RoadRunner, you need to pay attention to the following points:

1. Follow the official documentation of RoadRunner, install RoadRunner using the binary file, and create a .rr.yaml configuration file in the project root directory.
2. Make sure the application uses composer to manage pre-dependencies and provide a running script. PHP applications can use Symfony Process to create and run PHP processes to ensure correct operation.
3. When using RoadRunner to launch an application, it is recommended to set the development environment to run in debug mode to check the actual effect of the application in this environment. At the same time, you can also use official monitoring tools to monitor application concurrency and performance.

3. Conclusion

High-performance PHP applications can meet the needs of different business scenarios, such as e-commerce websites, social networks, online games, etc. This article introduces two different PHP server tools, PHP-PM and RoadRunner. They are both tools for high-concurrency and high-performance processing scenarios, which can effectively improve the performance and concurrent processing capabilities of PHP applications. Developers can choose the tools that suit their needs to improve the performance and stability of PHP applications.

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