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

Working with new PHP 8 operators

A number of new operators have been introduced with PHP 8. In addition, PHP 8 generally introduces a uniform and consistent manner in which these operators can be used. In this section, we examine the following operators:

  • Variadics operator
  • Nullsafe operator
  • Concatenate operator
  • Ternary operator

Let's start with a discussion of the variadics operator.

Using the variadics operator

The variadics operator consists of three leading dots (...) preceding a normal PHP variable (or object property). This operator has actually been with the language since PHP 5.6. It's also referred to as the following:

  • Splat operator
  • Scatter operator
  • Spread operator

Before we dive into the improvements PHP 8 has made using this operator, let's have a quick look at how the operator is normally used.

Unknown number of arguments

One of the most common uses for the variadics operator is in a situation...