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

Composer autoloader

Not only does Composer handle dependency management, which is already no mean feat, it also provides us with a simple developer experience when writing code that uses our dependencies, or even our application code.

The problem that it solves is that it will automatically require the PHP files for any classes that are needed by any other classes. Loading PHP files on demand saves us a huge amount of boilerplate code and general pain. The term for automatically loading PHP files is known as "autoloading."

Old-fashioned versus autoloaded

To illustrate what autoloading is all about, let's have a look at some old-fashioned PHP code and compare it with some modern autoloader-based code.

First, let's define two classes that we will require/autoload.

First, we have two simple classes:



namespace Book\Part4\Chapter10\Dependencies...