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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

## Constructor method

We use the `__construct()` method in order to do something as soon as we create an object out of a class. A method of this kind is called a **constructor**.

> **Note:** The names of **magic methods** always start with two underscores. The `__construct()` magic method is no exception.

Usually, we use the constructor to set a value to a property.
In our simple example, we should set the value of the `$model` property as soon as we create the object, so we add a constructor inside the class that sets the value of the `$model` property.

# Constructor method

We use the `__construct()` method in order to do something as soon as we create an object out of a class. A method of this kind is called a **constructor**.

> **Note:** The names of **magic methods** always start with two underscores. The `__construct()` magic method is no exception.

Usually, we use the constructor to set a value to a property.
In our simple example, we should set the value of the `$model` property as soon as we create the object, so we add a constructor inside the class that sets the value of the `$model` property.

# Constructor method

We use the `__construct()` method in order to do something as soon as we create an object out of a class. A method of this kind is called a **constructor**.

> **Note:** The names of **magic methods** always start with two underscores. The `__construct()` magic method is no exception.

Usually, we use the constructor to set a value to a property.
In our simple example, we should set the value of the `＄model` property as soon as we create the object, so we add a constructor inside the class that sets the value of the `＄model` property.

Learn about the constructor method and how to write a constructor method without risking an error.

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

The construct() Magic Method

Constructor method