Exploring Advanced Concepts in PHP OOP Classes and Functions! #oop

Introduction:

PHP is a widely-used open-source programming language for web development. PHP is an acronym for “Hypertext Preprocessor.” PHP is popular because it is easy to learn and use, and it has a large developer community. Object-Oriented Programming (OOP) is a programming paradigm that enables us to build complex software systems by using objects, classes, and inheritance. In this article, we will explore PHP OOP classes and functions.

PHP OOP Classes:

Classes are the building blocks of OOP. A class is a blueprint for creating objects that have properties and methods. Properties are variables that store data, and methods are functions that perform actions. To create a class in PHP, we use the “class” keyword, followed by the name of the class. For example, let’s create a class called “Person”:

Code:
class Person {
public $name;
public $age;

public function __construct($name, $age) {
$this-name = $name;
$this-age = $age;
}

public function sayHello() {
echo “Hello, my name is ” . $this-name . ” and I am ” . $this-age . ” years old.”;
}
}
In this example, we have created a class called “Person” that has two properties: $name and $age. We have also defined a constructor method using the “__construct” keyword, which sets the initial values of the properties. Finally, we have defined a method called “sayHello” that echoes a message to the screen.

To create an instance of a class, we use the “new” keyword, followed by the name of the class. For example:

Code:
$person = new Person(“John”, 25);
$person-sayHello();
// outputs: “Hello, my name is John and I am 25 years old.”
In this example, we have created an instance of the “Person” class and passed in the name “John” and age “25” as arguments to the constructor. We have then called the “sayHello” method on the instance, which outputs a message to the screen.

PHP OOP Functions:

Functions in PHP OOP are similar to regular functions in PHP, but they are defined inside a class and can only be called on instances of that class. To define a function inside a class, we use the “function” keyword, followed by the name of the function. For example:

Code:
class Calculator {
public function add($a, $b) {
return $a + $b;
}

public function subtract($a, $b) {
return $a – $b;
}
}
In this example, we have defined a class called “Calculator” that has two methods: “add” and “subtract”. The “add” method takes two arguments and returns their sum, while the “subtract” method takes two arguments and returns their difference.

Github: https://github.com/Umii010?tab=repositories
Quora: https://www.quora.com/profile/UmerShahzad
Do Like Subscribe and Share with Your Friends Keep Learning and Keep Exploring.