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.

php-lamp.tar.gz

php-db

php-db-challenge

php-composer

php-package-install

php-redirect

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
- Create an abstract class named `User` with an abstract method named `stateYourRole()`.
- Add a `protected` property named `$username` to the `User` abstract class. Then, add the `public` setter and getter methods to set and get the `$username`.
- Create an `Admin` class that inherits the abstract `User` class.
Define the `stateYourRole()` method in the child class and make it return the string `admin`.
- Create another class named `Viewer` that inherits the `User` abstract class. Define the methods that should be defined in each child class of the `User` class.
- Inside the `test()` method, create an object from the `Admin `class. Set the `$username` to `Balthazar` and make it return the string `admin` by calling the appropriate 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
- Create an abstract class named `User` with an abstract method named `stateYourRole()`.
- Add a `protected` property named `＄username` to the `User` abstract class. Then, add the `public` setter and getter methods to set and get the `＄username`.
- Create an `Admin` class that inherits the abstract `User` class.
Define the `stateYourRole()` method in the child class and make it return the string `admin`.
- Create another class named `Viewer` that inherits the `User` abstract class. Define the methods that should be defined in each child class of the `User` class.
- Inside the `test()` method, create an object from the `Admin `class. Set the `＄username` to `Balthazar` and make it return the string `admin` by calling the appropriate 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!

Try to create an abstract class and make the child classes inherit from that abstract class.

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: Abstract Classes and Methods

Task