Design Patterns in PHP: A Practical Guide

This book is your guide to the world of design patterns in PHP. If you are already familiar with the basics of the language and want to move to the next level, creating flexible, maintainable, and scalable applications — this edition is for you.

The book thoroughly covers classic GoF (Gang of Four) patterns, as well as popular architectural patterns used in modern PHP frameworks (Laravel, Symfony, Yii). Each pattern is explained through real business tasks that every developer encounters.

What you will learn:

• Creational patterns: Singleton, Factory Method, Abstract Factory, Builder, Prototype — how to manage object creation without tight coupling to classes.
• Structural patterns: Adapter, Decorator, Facade, Proxy, Composite — how to flexibly build relationships between classes and objects.
• Behavioral patterns: Strategy, Observer, Command, Chain of Responsibility, State — how to organize interaction between objects.
• Architectural patterns: MVC, Active Record, Repository, Dependency Injection, Service Locator — how to build the application skeleton.
• Anti-patterns: which solutions to avoid and how to refactor legacy code.

Book features:

• Each pattern is accompanied by complete PHP code with explanations.
• UML diagrams for structure visualization.
• Examples of integration with popular frameworks (Laravel, Symfony).
• Practical exercises at the end of each chapter to reinforce the material.
• A chapter on testing patterns using PHPUnit.

Who this book is for:

• Junior developers who want to systematize their knowledge and write professional code.
• Middle developers striving to improve the architecture of existing projects.
• Team Leads and architects looking for a reference on PHP patterns.
• Anyone transitioning from procedural style to OOP and wanting to avoid common mistakes.

The book is written in simple and clear language, without excessive academicism. You will not just learn the names of patterns — you will learn to feel when and which pattern to apply. After reading, you will be able to design systems that are easy to extend, test, and maintain.

The author, a senior developer with 10 years of experience in PHP, shares not only theory but also real cases from commercial development. All examples are tested on PHP 8.x and are compatible with the latest versions of frameworks.

Start writing code you won't be ashamed to show your colleagues, and forget about endless edits to legacy projects. This book will become your desktop reference for years to come.