Book Image

The Art of Modern PHP 8

By : Joseph Edmonds
5 (1)
Book Image

The Art of Modern PHP 8

5 (1)
By: Joseph Edmonds

Overview of this book

PHP has come a long way since its introduction. While the language has evolved with PHP 8, there are still a lot of websites running on a version of PHP that is no longer supported. If you are a PHP developer working with legacy PHP systems and want to discover the tenants of modern PHP, this is the book for you. The Art of Modern PHP 8 walks you through the latest PHP features and language concepts. The book helps you upgrade your knowledge of PHP programming and practices. Starting with object-oriented programming (OOP) in PHP and related language features, you'll work through modern programming techniques such as inheritance, understand how it contrasts with composition, and finally look at more advanced language features. You'll learn about the MVC pattern by developing your own MVC system and advance to understanding what a DI container does by building a toy DI container. The book gives you an overview of Composer and how to use it to create reusable PHP packages. You’ll also find techniques for deploying these packages to package libraries for other developers to explore. By the end of this PHP book, you'll have equipped yourself with modern server-side programming techniques using the latest versions of PHP.
Table of Contents (19 chapters)
Section 1 – PHP 8 OOP
Free Chapter
Chapter 1: Object-Oriented PHP
Section 2 – PHP Types
Chapter 5: Object Types, Interfaces, and Unions
Section 3 – Clean PHP 8 Patterns and Style
Section 4 – PHP 8 Composer Package Management (and PHP 8.1)
Section 5 – Bonus Section - PHP 8.1


The Model represents the data and business logic for our app. In the toy MVC there is no real business logic, but in a full app, you would expect at least some form of CRUD functionality. In a real app, the Model is expected to be the most substantial aspect and certainly the bit that requires the most thorough testing, as in some regards it represents the true nature and purpose of the app itself.

In our toy, the Model is purely serving to retrieve data, but it is enough for us to introduce you to another design pattern, namely the Repository.

Entity pattern

An entity is a unit of data that represents a single thing. In the ubiquitous language of our application, the entity name will be meaningful and describe clearly what it represents.

For our toy MVC, we have two entity types:

  • Category
  • Post

The relationship between our entities is a one-to-many relation between Categories and Posts – meaning that Categories are related to zero or more...