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 PHP 8 error handling

Historically, many PHP error conditions were assigned an error level far below their actual severity. This gave developers a false sense of security as seeing only a Notice led them to believe that their code was not deficient. Many situations only formerly generated a Notice or a Warning when in fact their seriousness merited greater attention.

In this section, we look at a number of error-handling enhancements in PHP 8 that continue with the overall trend of enforcing good coding practices. The discussion in this chapter will help you to re-examine your code, with an eye toward greater efficiency and fewer maintenance issues down the road.

In the next several subsections, we have a look at changes to certain Notice and Warning error conditions that could have an impact on your code. Let's first have a look at changes in how PHP 8 handles undefined variables.

Undefined variable handling

One notorious feature of PHP is how it treats...