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

Object inheritance


The OOP paradigm places objects at the heart of application design, where objects can be looked at as units that contain various properties and methods. Interaction between these properties and methods defines the internal state of an object. Every object is built from a blueprint called a class. There is no such thing as an object without the class, at least not in a class-based OOP.

Note

We differentiate class-based OOP (PHP, Java, C#, ...) and prototype-based OOP (ECMAScript / JavaScript, Lua, ...). In class-based OOP, objects are created from classes; in prototype-based OOP, objects are created from other objects.

The process of building or creating new objects is called instantiation. In PHP, like many other languages, we use the new keyword to instantiate an object from a given class. Let's take a look at the following example:

<?php

class JsonOutput
{
  protected $content;

  public function setContent($content)
  {
    $this->content = $content;
  }

  public...