PHP Design Patterns: A Practical Guide

This book is a comprehensive guide to applying Design Patterns in PHP. It is intended for developers who want to go beyond simply writing code and learn how to create flexible, maintainable, and scalable applications.

What is this book about?

The book covers all 23 classic design patterns from the "Gang of Four" (GoF) book, adapted for modern PHP. You won't just study the theory — each pattern is broken down using real-world web development examples: working with databases, handling HTTP requests, creating APIs, and building user interfaces.

Who is this book for?

• Junior and Mid-level PHP developers who want to improve the quality of their code
• Programmers transitioning from procedural programming to Object-Oriented Programming
• Team leads and architects looking for proven solutions to common problems
• Anyone preparing for technical interviews who wants to systematize their knowledge

What will you learn?

• Creational Patterns: Singleton, Factory Method, Abstract Factory, Builder, Prototype
• Structural Patterns: Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy
• Behavioral Patterns: Chain of Responsibility, Command, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor
• SOLID Principles and their relationship with patterns
• Anti-patterns — common mistakes and how to avoid them
• Integrating patterns with popular frameworks (Laravel, Symfony) and CMS

Book features

• All code examples are written in PHP 8.x using strict typing and modern language features
• Each pattern is accompanied by a UML diagram to visualize the structure
• Practical exercises after each chapter to reinforce the material
• Comparison of different implementations of the same pattern and recommendations for choosing

The book is written in a lively style, without excessive academicism. The author shares not only technical knowledge but also experience applying patterns in real commercial projects. You will learn not just to copy templates, but to understand when and which pattern is truly needed, and when it is better to avoid it.

This is not a reference book for skimming through — it is a practical guide that will help you change your approach to development and start writing code that is easy to maintain, test, and extend.