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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

## Task

Let’s consider a `User` class that contains a `private` property with the name of `$firstName`.
* Create a setter method to set the `$firstName` property value. Remember to use the suitable access modifier `(public/private)`.
* Create a getter method to return the `$firstName` value.
* Inside a `test()` method, create a new user object with the name of `$user1`, set its name using the setter method to `Joe`, and return its name from the `test()` method using the getter method.

## Coding exercise

Since these problems are designed for your practice,  try to solve them yourself first. If you get stuck, you can click the “Show Solution” button to see how the problem can be solved. Good luck!

# Task

Let’s consider a `User` class that contains a `private` property with the name of `$firstName`.
* Create a setter method to set the `$firstName` property value. Remember to use the suitable access modifier `(public/private)`.
* Create a getter method to return the `$firstName` value.
* Inside a `test()` method, create a new user object with the name of `$user1`, set its name using the setter method to `Joe`, and return its name from the `test()` method using the getter method.

# Coding exercise

Since these problems are designed for your practice,  try to solve them yourself first. If you get stuck, you can click the “Show Solution” button to see how the problem can be solved. Good luck!

# Task

Let’s consider a `User` class that contains a `private` property with the name of `＄firstName`.
* Create a setter method to set the `＄firstName` property value. Remember to use the suitable access modifier `(public/private)`.
* Create a getter method to return the `＄firstName` value.
* Inside a `test()` method, create a new user object with the name of `＄user1`, set its name using the setter method to `Joe`, and return its name from the `test()` method using the getter method.

# Coding exercise

Since these problems are designed for your practice,  try to solve them yourself first. If you get stuck, you can click the “Show Solution” button to see how the problem can be solved. Good luck!

Add a property to a class and write appropriate getter and setter functions.

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

Challenge: Access Modifiers

Task

Coding exercise