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php-package-install

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Object-oriented programming is perhaps the dominant development paradigm for leading languages including Java, C#, and Python. The rich class and inheritance framework wasn’t fully implemented in modern PHP until 2015, and best practices for object-oriented programming are still emerging.

This course is an introduction to object-oriented programming in PHP. You’ll start with the basics of the OOP paradigm and get familiar with classes, objects, methods, and properties. You’ll then chain methods and properties using the this keyword before working with access modifiers and magic methods. With these basics down, you’ll take a deep dive into object-oriented programming in PHP, including inheritance, abstraction, polymorphism, and namespaces. After exploring exception handling, you’ll use these object-oriented techniques to build, manage, and edit a PHP database.

By the end of this course, you’ll be prepared to build dynamic server-side applications using object-oriented programming in PHP.

Object-Oriented Programming in PHP

In addition to magic methods, the PHP language offers several **magic constants**.
For example, we may use the magic constant `__CLASS__` in order to get the name of the class in which it resides.

> **Note:** Magic constants are written in uppercase letters and prefixed and suffixed with two underlines.

## The `__CLASS__` magic constant

Let’s take a look at the following example in which we use the `__CLASS__` magic constant in the getter method:

 

In addition to magic methods, the PHP language offers several **magic constants**.
For example, we may use the magic constant `__CLASS__` in order to get the name of the class in which it resides.

> **Note:** Magic constants are written in uppercase letters and prefixed and suffixed with two underlines.

# The `__CLASS__` magic constant

Let’s take a look at the following example in which we use the `__CLASS__` magic constant in the getter method:

 

Learn about the magic constants and their usage.

Introduction

Classes and Objects

Using the $this Keyword for Chaining Methods and Properties

Access Modifiers

Magic Methods and Constants Unveiled

Inheritance in Object-oriented Programming

Abstract Classes and Interfaces

Polymorphism and Type Hinting

Static Methods & Properties and Traits

Namespaces & Dependency Injection

Exception Handling

PHP Database

Model-view-controller (MVC)

Conclusion

Appendix

Magic Constants

The `CLASS` magic constant