Gain insights into object-oriented programming in PHP. Discover classes, objects, methods, inheritance, and more. Build dynamic server-side applications using OOP techniques and PHP database management.

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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

You’ve reached the end of the course! Congratulations on a job well done!


In this course, we covered the essentials of object-oriented PHP. We started by understanding what classes and objects are as well as how to use them to encapsulate code from the rest of the application. Additionally, we learned about inheritance as a means of reducing code duplication.

We also learned how to construct an application with the help of interfaces and polymorphism. In the final part, we began scratching the surface of real-world applications with namespaces that allow us to work with different code libraries. We used PDO as the database interface and MVC as the design pattern by which we can construct our applications in a well-tested way.

We hope that by this point you have a strong grasp of the object-oriented style of programming and can answer the following questions:


1. What are the benefits of encapsulating the code within classes?

2. Why use inheritance?

3. Why are interfaces and polymorphism such great ideas?

4. How can namespaces and the MVC pattern help build robust applications?

This lesson summarizes everything we've learned so far.


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

What Have We Learned?