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

PSR-4 - autoloading standard


To this date, the PHP-FIG group has released two autoloading standards. Predating PSR-4 was PSR-0. It was the first standard released by the PHP-FIG group. Its class naming had certain backward compatibility features aligned with an even older PEAR standard. Whereas, each level of the hierarchy was separated with a single underscore, indicating pseudo-namespaces and directory structure. The PHP 5.3 release then brought official namespace support to the language. PSR-0 allowed both the old PEAR underscore mode and the use of the new namespace notation. Allowing the underscores for some time to follow eased the transition to namespaces and encouraged wider adoption. Pretty soon, Composer came on the scene.

Note

Composer is a popular dependency manager for PHP that deals with packages and libraries by installing them in a vendor/ directory of our project.

With Composer's vendor/ directory philosophy, there was no single main directory for PHP sources as with PEAR....