Introduction to PHP 8 Best Practices
Explore PHP 8 best practices by understanding method signature updates, namespace parsing, and async programming. Learn how to optimize performance, handle migrations, and write efficient code that minimizes memory use and avoids common pitfalls.
Mastering PHP 8 best practices
In this chapter, we will be introduced to the best practices that are currently enforced in PHP 8. We will cover several significant method signature changes and how their new usage continues the general PHP trend of helping us produce better code. We will also have a look at how private methods, interfaces, traits, and anonymous class usage have changed. Finally, we will discuss important changes in how namespaces are parsed.
Mastering the best practices that will be covered in this chapter will not only move us toward writing better code but also teach us how to avoid the potential code breaks that might arise if we fail to grasp these new practices. In addition, the techniques discussed in this chapter will help us write code that’s more efficient than was possible in the past.
Improving performance
PHP 8 introduces a number of new features that have a positive effect on performance. Also, a number of internal improvements, especially in array handling and managing object references, led to a substantive performance increase over earlier PHP versions. In addition, many of the PHP 8 best practices covered in this chapter lead to greater efficiency and lower memory usage. In this chapter, we’ll discover how to optimize our PHP 8 code to achieve maximum performance.
PHP 8 includes a technology referred to as weak references. By mastering this technology, discussed in the last lesson of this chapter, our applications will use far less memory. By carefully reviewing the material covered in this chapter and by studying the code examples, we will be able to write faster and more efficient code. Such mastery will vastly improve our standing as a PHP developer and result in satisfied customers, as well as improving our career potential.
Migrating existing PHP applications to PHP 8
Throughout this course, we have been warned of potential code breaks. Unfortunately, there are not really any good tools available that can scan our existing code and check for potential code breaks. In this chapter, we learn about the development of a set of classes that form the basis of a PHP 8 backwards-compatible (BC) break scanner.
We will learn the recommended process to migrate an existing customer PHP application to PHP 8. After reading through this chapter and carefully studying the examples, we will be much better equipped to handle a PHP 8 migration. With knowledge of the overall migration procedure, we will gain confidence and will be able to perform PHP 8 migrations with a minimal number of problems.
Creating PHP 8 applications using asynchronous programming
In recent years, an exciting new technology has taken the PHP community by storm: asynchronous programming, also known as PHP async. The asynchronous programming model addresses an issue present in any application code written using the traditional synchronous mode of programming: our application is forced to wait for certain tasks to complete before providing results. The central processing unit of the server upon which our application is running is idle, while mundane input/output (I/O) tasks are performed. PHP async allows our application to take full advantage of hardware resources by suspending blocking I/O tasks until later. The net effect is a massive increase in performance, as well as the ability to handle a geometrically larger number of user requests.
After reading through this chapter and carefully studying the examples, we will be able to develop PHP async applications. In addition, we will be able to take advantage of the sync capabilities of selected PHP extensions and frameworks. By the time we are done working through this chapter, we will be in a position to improve the performance of our applications from five times up to a staggering 40 times faster!
