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

Handling arrays in PHP 8

Aside from improvements in performance, the two main changes in PHP 8 array handling pertain to the handling of negative offsets and curly brace ({}) usage. Since both of these changes could result in application code breaks following a PHP 8 migration, it's important to cover them here. Awareness of the issues presented here gives you a better chance to get broken code working again in short order.

Let's have a look at negative array offset handling first.

Dealing with negative offsets

When assigning a value to an array in PHP, if you do not specify an index, PHP will automatically assign one for you. The index chosen in this manner is an integer that represents a value one higher than the highest currently assigned integer key. If no integer index key has yet been assigned, the automatic index assignment algorithm starts at zero.

In PHP 7 and below, however, this algorithm is not applied consistently in the case of a negative integer...