Tuesday , 18 June 2019
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Tag Archives: object oriented programming

Abstract Classes – PHP OOP Tutorial

Abstract Classes

Today, we’ll be discussing what abstract classes are and how we could use them. There will be times where you’ll create a class that you don’t want anyone to use directly, but instead extend it. Let’s take a closer look at this Creating Abstract Classes We’re going to deviate from our Pet class for a bit. Mostly because we don’t …

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Static Methods and Properties – PHP OOP Tutorial

Static Methods and Properties

Let’s learn how to create static methods and properties. Anything that’s static is basically something that can be accessed without needing an instantiation of the class. You also have the advantage of having a value that is consistent through each instance of the class. Let’s take a look at this. Creating Static Properties Inside our Pet Class, add this bit of …

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Constants – PHP OOP Tutorial

Constants

Constants are variables that don’t change value during the lifetime of a program. Defining constants in classes are a bit different than defining constants outside of a class. Defining Constants In our CanadianPet class, add this bit of code. [crayon-5d09191846670645400994/] To define a constant, we use the const keyword. We then follow it by the name of the constant and …

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Scope Resolution Operator – PHP OOP Tutorial

Scope Resolution Operator

The scope resolution operator may sound intimidating, but it’s actually quite simple to use. What it basically does is it allows you to access static, constant, or overridden methods and properties of a class. We haven’t discussed static and constant properties and methods yet. We will soon in a another tutorial, but for now, we can use it to access …

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Constructor Method – PHP OOP Tutorial

Constructor Method

It’s always good practice to have things set up when someone creates an instance of your class instead of calling a bunch of functions to do so. Users should only have to call set methods when they need to update or change some properties in your class. The constructor method is the perfect solution to setting up your class for …

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Encapsulation – PHP OOP Tutorial

Encapsulation

Encapsulation may seem like an intimidating topic, but it’s actually quite simple. Object oriented programming is based on 3 principles which are encapsulation, inheritance, and polymorphism. In this tutorial, we’ll be talking about encapsulation and why it’s important to understand this principle. We’ll talk about the other 2 in future tutorials. What is encapsulation? So, what is the meaning behind …

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Extending Classes – PHP OOP Tutorial

Extending Classes

Let’s talk about extending classes for a moment. One of the benefits of using classes is that it’s easy to share your classes with other developers. They can extend the class if you allow them to.  So instead of going into your class and updating the code, they can create a different class that only changes a few things here …

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