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 the shift from resources to objects

The PHP language has always had an uneasy relationship with resources. Resources represent a connection to an external system such as a file handle or a connection to a remote web service using the client URL (cURL) extension. One big problem with resources, however, is that they defy attempts at data typing. There's no way to distinguish a file handle from a cURL connection—they're both identified as resources.

In PHP 8, a major effort has taken place to move away from resources and to replace them with objects. One of the earliest examples of this trend prior to PHP 8 is the PDO class. When you create a PDO instance, it automatically creates a database connection. Starting with PHP 8, many functions that previously produced a resource now produce an object instance instead. Let's start our discussion by having a look at extension functions that now produce objects rather than resources.

PHP 8 extension...