Book Image

Mastering PHP Design Patterns

By : Junade Ali
Book Image

Mastering PHP Design Patterns

By: Junade Ali

Overview of this book

Design patterns are a clever way to solve common architectural issues that arise during software development. With an increase in demand for enhanced programming techniques and the versatile nature of PHP, a deep understanding of PHP design patterns is critical to achieve efficiency while coding. This comprehensive guide will show you how to achieve better organization structure over your code through learning common methodologies to solve architectural problems. You’ll also learn about the new functionalities that PHP 7 has to offer. Starting with a brief introduction to design patterns, you quickly dive deep into the three main architectural patterns: Creational, Behavioral, and Structural popularly known as the Gang of Four patterns. Over the course of the book, you will get a deep understanding of object creation mechanisms, advanced techniques that address issues concerned with linking objects together, and improved methods to access your code. You will also learn about Anti-Patterns and the best methodologies to adopt when building a PHP 7 application. With a concluding chapter on best practices, this book is a complete guide that will equip you to utilize design patterns in PHP 7 to achieve maximum productivity, ensuring an enhanced software development experience.
Table of Contents (14 chapters)
Mastering PHP Design Patterns
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Adapter


There are two types of Adapter pattern. I have a clear preference for Object Adapters over Class Adapters where possible; I will explain this in detail later.

The Adapter pattern allows an existing class to be used with an interface that it doesn't match. It is often used to allow existing classes to work with others without needing to alter their source code.

This can be quite useful in a polymorphic setting where you are using third-party libraries, each with their own interface.

Fundamentally, an Adapter helps two incompatible interfaces work together. Otherwise incompatible classes can be made to work together by converting the interface of one class into an interface expected by the clients.

Class Adapter

In a Class Adapter, we use inheritance to create an adapter. A class (the adapter) can inherit another (the adaptee); using standard inheritance we are able to add additional functionality to the adaptee.

Let's suppose we have an ATM class, in our ATM.php file:

<?php 
 
...