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

Chapter 4: Scalar, Arrays, and Special Types

Welcome to Section 2. In this part of the book, we are going to look at something that has become much more of a first-class feature in modern PHP: types.

The release of PHP 7 marked a significant turning point in the history of PHP. It ended a long period of stagnation that included the abandonment of a whole version – PHP 6. With PHP 7, we got some significant and highly useful changes to the language, and one of those was the introduction of scalar type declarations:

PHP: New features - Manual

PHP 7 brought the advent of scalar type hints and strict type checking. This allowed us to write code with a clearer API and built-in assurances that parameters are at least of the correct type, which allowed a significant reduction in boilerplate code to confirm parameters are correct. It also brought in the concept of return types. These two added features tipped the...