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

Arrays and iterables

Now that we have looked at the simple scalar types, we should look at the single most utilized compound type in PHP – the array – and its close relation, iterables.


Arrays in PHP are hugely powerful and useful. You can use it to pass a handful of values around, or you can let it grow to tremendous sizes and eat all your system's RAM if you so choose.

Have a look at the official docs for arrays:

PHP: Arrays - Manual

What the docs say, in more words than me, is that arrays are the single tool that ticks a load of data structure boxes. An array consists of keys and associated values. The keys can be int or string. If they are not specified, then they are int starting at 0.

There are a huge number of built-in functions that assist with efficiently processing arrays. You should always try to use the built-in functions instead of creating your own, so try to learn the...