Book Image

PHP 8 Programming Tips, Tricks and Best Practices

By : Doug Bierer
Book Image

PHP 8 Programming Tips, Tricks and Best Practices

By: Doug Bierer

Overview of this book

Thanks to its ease of use, PHP is a highly popular programming language used on over 78% of all web servers connected to the Internet. PHP 8 Programming Tips, Tricks, and Best Practices will help you to get up-to-speed with PHP 8 quickly. The book is intended for any PHP developer who wants to become familiar with the cool new features available in PHP 8, and covers areas where developers might experience backward compatibility issues with their existing code after a PHP 8 update. The book thoroughly explores best practices, and highlights ways in which PHP 8 enforces these practices in a much more rigorous fashion than its earlier versions. You'll start by exploring new PHP 8 features in the area of object-oriented programming (OOP), followed by enhancements at the procedural level. You'll then learn about potential backward compatible breaks and discover best practices for improving performance. The last chapter of the book gives you insights into PHP async, a revolutionary new way of programming, by providing detailed coverage and examples of asynchronous programming using the Swoole extension and Fibers. By the end of this PHP book, you'll not only have mastered the new features, but you'll also know exactly what to watch out for when migrating older PHP applications to PHP 8.
Table of Contents (17 chapters)
Section 1: PHP 8 Tips
Section 2: PHP 8 Tricks
Section 3: PHP 8 Best Practices

Understanding changes in namespaces

The concept of a namespace was introduced in PHP 5.3 as a means of isolating hierarchies of classes. Unfortunately, the original algorithm that was used to parse namespace names had several flaws. In addition to being overly complicated, the way in which namespace and class names were tokenized internally was performed in an inconsistent manner, leading to unexpected errors.

Before we get into the benefits and potential backward compatible breaks, let's have a look at how the namespace tokenization process has changed.

Discovering differences in tokenization

The tokenization process is an important part of the interpretation process and takes place when your PHP code is executed. In the process of producing byte code, the PHP program code is broken down into tokens by the PHP parsing engine.

The following table summarizes namespace tokenization changes:

Table 9.5 – Namespace tokenization differences in...