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

A collection of variables and functions working with these variables.

It sets and gets the class’s own properties and methods.

A class is the embodiment of a real-life object.


Which definition best explains the term “class?”

Which definition best explains the term “class?”

An object that allows us to work with a class.

Which definition best explains the term “object?”

Which definition best explains the term “object?”

It groups the code that is related to one topic.

Which definition best explains the term “property”?

Which definition best explains the term “property”?

Which definition best explains the term “method”?

Which definition best explains the term “method”?

Class name: `user`

Class properties: `FirstName`, `LastName`

Class method: `Hello()`

Class name: `User`

Class properties: `$firstName`, `$lastName`

Class method: `hello()`

Class name: `user`

Class properties: `FirstName`, `LastName`

Class method: `hello()`

Consider a user class that will contain the first and last name of each user and will be able to say hello to anyone who uses the application.

What is the correct class name, names of the properties for the first and last name, and the name of the method that returns hello?


Consider a user class that will contain the first and last name of each user and will be able to say hello to anyone who uses the application.
What is the correct class name, names of the properties for the first and last name, and the name of the method that returns hello?

What is the output of the following code?

```
<?php
class Car {
 public $comp;
 public $color = "beige";
 public $hasSunRoof = true;
}
 $bmw = new Car;
 echo $bmw -> color;
?>
```

What is the output of the following code?
<pre><code>&lt;?php
class Car {
 public $comp;
 public $color = &quot;beige&quot;;
 public $hasSunRoof = true;
}
 $bmw = new Car;
 echo $bmw -&gt; color;
?&gt;
</code></pre>

What is the output of the following code?

```
<?php
class Car {
 public $comp;
 public $color = "black";
 public $hasSunRoof = true;
}
 $car1 = new Car ();
 $car2 = new Car ();
 $car1 -> comp = "BMW";
 $car2 -> comp = "Mercedes Benz";
 echo $car1 -> color; 
 echo "\n";
 echo $car2 -> comp;
?>
```

What is the output of the following code?
<pre><code>&lt;?php
class Car {
 public $comp;
 public $color = &quot;black&quot;;
 public $hasSunRoof = true;
}
 $car1 = new Car ();
 $car2 = new Car ();
 $car1 -&gt; comp = &quot;BMW&quot;;
 $car2 -&gt; comp = &quot;Mercedes Benz&quot;;
 echo $car1 -&gt; color; 
 echo &quot;\n&quot;;
 echo $car2 -&gt; comp;
?&gt;
</code></pre>

A short quiz to test your understanding of classes and objects in PHP.

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

Quiz: Classes and Objects