PHP Application Architecture: From Simple to Complex

The book "PHP Application Architecture" is not just another syntax reference guide, but a deep dive into the world of designing and building reliable, scalable, and easily maintainable web systems. If you already write confidently in PHP and feel that your code lacks structure, and project maintenance is turning into a nightmare — this book is for you.

What is this book about?

The author consistently guides the reader from basic principles to complex architectural solutions. You will learn how to turn a chaotic set of scripts into a coherent, logical system ready for growth and change. The book covers key topics:

• SOLID and GRASP principles — the foundation of any quality architecture. You will learn to apply them in practice, not just memorize definitions.
• GoF Design Patterns — a detailed breakdown of the most popular patterns (Factory, Strategy, Observer, Repository, and others) with examples of their implementation specifically in the context of PHP.
• Architectural styles — from classic MVC to modern hexagonal architecture (Ports & Adapters) and CQRS. You will understand which approach to choose for your project.
• Working with databases — Data Mapper, Active Record, Unit of Work, and Identity Map patterns. How to avoid common mistakes when designing the data access layer.
• Testing and refactoring — how architecture facilitates writing unit and integration tests. Step-by-step examples of refactoring "dirty" code.
• Dependency management — Dependency Injection and using containers (DIC) with examples from PHP-DI and Symfony DI.
• Asynchrony and queues — how to offload heavy tasks from the HTTP request using RabbitMQ, Redis, or Beanstalkd.

Who is this book for?

The book is intended for PHP developers with 1-2 years of experience who want to move to the next level. It will be useful for those who:

• Write in PHP but feel a lack of theoretical background in architecture.
• Work with frameworks (Laravel, Symfony, Yii) and want to understand how they work "under the hood".
• Face problems when scaling an existing project.
• Strive to write code that is easy to test and maintain.

What will you learn after reading?

• How to design applications that are resilient to changing requirements.
• How to properly organize code so it doesn't "rot" over time.
• How to choose and combine patterns to solve real-world problems.
• How to integrate third-party services without breaking the architecture.
• How to build a system that can be easily tested.

This book is your guide to the world of professional PHP development. It won't give you ready-made recipes for every occasion, but it will equip you with the tools to find those solutions yourself. Start building an architecture you'll be proud of!