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

Exceptions and error handling

An exception in modern PHP is an object that represents the data for a particular error condition. Exceptions are not generally created with create but instead they are thrown, as in they are created and unleashed with one magic keyword: throw.

If you don't know about exceptions, it's time to hit the docs:

PHP: Exceptions - Manual

Once an exception is thrown, then it must be caught or it will become a Fatal Error. I always imagine it a bit like setting off the timer on a bomb. The bomb gets passed from handler to handler until it either hits someone who has the right tools to disable it, or we run out of layers that can possibly handle it and it goes off… boom.

We catch exceptions with the catch keyword. The catch keyword is always used with a type hint for what kind of exceptions it will catch. This can be quite specific, or can be totally general by hinting for Throwable...