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

Inheritance–the classical parent, child, and "is a" style

Inheritance describes the way that PHP allows us to create formal and hierarchical graphs of related objects with a single-parent, multiple-child structure.

Even if you decide to avoid ever using inheritance in your own, lovingly crafted PHP, you will not be able to avoid the fact that inheritance plays a huge role in the built-in classes and interfaces and is also a major feature of big, must-have libraries such as PHPUnit.

To get a full understanding of the PHP inheritance model, your first port of call should be the official documentation:

PHP Manual – Object Inheritance

Inheritance in OOP refers to the fact that a class can inherit properties and methods from a parent class.

Have a look at the very simple demonstration that follows, which demonstrates one-level inheritance and also illustrates what is and is not accessible...