Async PHP: The Complete Guide

The book "Asynchronous PHP: The Complete Guide" is the first publication of its kind in Russian, systematically revealing the paradigm of asynchronous programming in the PHP ecosystem. The author, Artyom Belyakov, a developer with 10 years of experience building high-load web services, consistently guides the reader from the basic concepts of non-blocking I/O to building production-ready microservices.

Unlike traditional PHP books that focus on synchronous execution, this guide breaks stereotypes and shows how PHP can effectively compete with Node.js and Go in the real-time domain. You will learn how to handle thousands of concurrent connections in a single process and build chats, games, streaming services, and APIs with WebSocket.

What you will learn:

• The foundation of asynchrony: event loop, coroutines, generators, promises, and async/await in PHP 8+
• Core frameworks: a deep dive into ReactPHP (building TCP/UDP servers, HTTP clients) and Swoole (building microservices, working with process pools)
• Working with databases: asynchronous drivers for MySQL, PostgreSQL, and Redis, preventing blocking
• Timeouts and debugging: profiling asynchronous code, exception handling, logging in non-blocking mode
• Advanced scenarios: WebSocket servers, task queues (RabbitMQ, Kafka), integration with external APIs via asynchronous HTTP requests
• Deployment and monitoring: containerization of asynchronous applications, configuring Supervisor, and load balancing

The book is intended for PHP developers with at least 1 year of experience who want to go beyond "scripting" PHP and learn to build scalable systems. A basic understanding of OOP and working with Composer is sufficient for reading. Each chapter contains practical code examples ready to run and assignments for independent work.

Special attention is paid to comparison with synchronous approaches: you will see how the same tasks (request processing, file handling, data parsing) are solved in an asynchronous style and why this yields a performance gain of up to 10 times on I/O operations. The final part covers building a complete web application: from WebSocket authorization to asynchronous email sending and report generation.

After reading, you will be able to confidently design architectures where PHP works as an asynchronous engine, handling thousands of parallel tasks without increasing memory consumption. This is not just a book — it is a bridge from classic PHP to modern reactive programming.