The Clean Architecture in PHP: A Short Review

I recently finished reading The Clean Architecture in PHP, and it was an enjoyable and practical journey through SOLID principles, design patterns, and Clean Architecture.

The book does a great job of introducing the theory behind these concepts before applying them to a growing PHP project. Instead of presenting architecture as a collection of abstract ideas, it demonstrates how an application can evolve while keeping its business logic maintainable and independent from external concerns.

One of the most interesting parts is the gradual transition between frameworks. The project moves from Zend to Laravel and then Symfony, showing how a well-decoupled application can adapt to different technologies without requiring major changes to its core business logic.

What I liked about the book

• It explains SOLID principles and common design patterns in a practical way.
• It introduces the theory briefly before applying it to a real project.
• The project grows throughout the book, making the architectural decisions easier to understand.
• It demonstrates how to isolate framework-specific code.
• It shows how the same application can be adapted to different PHP frameworks.
• It focuses on practical decoupling rather than architecture for its own sake.

Some topics were covered rather briefly, so I occasionally used additional resources to explore them in more detail. However, this did not take away from the overall learning experience.

Practical lessons I took from the book

• Keep business logic independent of frameworks whenever possible.
• Depend on abstractions rather than concrete implementations.
• Use dependency injection to make code easier to test and replace.
• Avoid putting too much responsibility into controllers or service classes.
• Introduce design patterns to solve real problems—not simply to make the code look sophisticated.
• Treat architecture as something that evolves as a project grows.
• Isolate framework-specific code at the boundaries of the application.
• Write tests for business rules independently of the database and web framework.
• Prefer small, focused classes over large classes with many responsibilities.
• Refactor continuously instead of waiting until the codebase becomes difficult to maintain.

Final thoughts

Overall, this book provides a practical introduction to Clean Architecture in PHP. Its biggest strength is the combination of theory and application: concepts are introduced and then demonstrated through a project that becomes more advanced over time.

I would recommend it to developers who already understand the basics of object-oriented programming and want to improve the structure, flexibility, and maintainability of their applications. It is also a useful resource for anyone who wants to understand why decoupling matters and how to apply it in a real-world project.

This is a short review because the book felt less like a collection of isolated lessons and more like an enjoyable journey through better software design.