Book Image

Mastering PHP 7

By : Branko Ajzele
Book Image

Mastering PHP 7

By: Branko Ajzele

Overview of this book

PHP is a server-side scripting language that is widely used for web development. With this book, you will get a deep understanding of the advanced programming concepts in PHP and how to apply it practically The book starts by unveiling the new features of PHP 7 and walks you through several important standards set by PHP Framework Interop Group (PHP-FIG). You’ll see, in detail, the working of all magic methods, and the importance of effective PHP OOP concepts, which will enable you to write effective PHP code. You will find out how to implement design patterns and resolve dependencies to make your code base more elegant and readable. You will also build web services alongside microservices architecture, interact with databases, and work around third-party packages to enrich applications. This book delves into the details of PHP performance optimization. You will learn about serverless architecture and the reactive programming paradigm that found its way in the PHP ecosystem. The book also explores the best ways of testing your code, debugging, tracing, profiling, and deploying your PHP application. By the end of the book, you will be able to create readable, reliable, and robust applications in PHP to meet modern day requirements in the software industry.
Table of Contents (24 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
16
Debugging, Tracing, and Profiling

Zend OPcache


One major downside of PHP is that it loads and parses the PHP script on every request. Written in plain text, the PHP code is first compiled to opcodes, then the opcodes are executed. While this performance impact might not be noticeable with small applications that have one or few scripts in total, it makes a big difference with larger platforms, such as Magento, Drupal, and so on.

Starting from PHP 5.5, there is an out-of-the-box solution to this problem. The Zend OPcache extension addresses the repetitive compilation issue by storing the compiled opcodes in shared memory (RAM). Turning it on or off is simply a matter of changing the configuration directive.

There are quite a few configuration directives, a few of which will get us started:

  • opcache.enable: This defaults to 1 and is changeable via PHP_INI_ALL.
  • opcache.enable_cli: This defaults to 0 and is changeable via PHP_INI_SYSTEM.
  • opcache.memory_consumption: This defaults to 64 and is changeable via PHP_INI_SYSTEM, which defines...