PHP is a programming language that is used to create dynamic websites. PHP is a server-side scripting language, which means that the code is executed on the server, and the results are sent to the client’s browser. PHP is a popular language for web development because it is easy to learn, and it is free.
PHP is an object-oriented programming language. This means that you create objects, which are like templates for the data that you want to store. You can then create methods for the objects, which are like the functions that you would use in a traditional programming language.
In this tutorial, we will create a simple PHP program that will calculate the area of a rectangle. We will start by creating a class called Rectangle. The Rectangle class will have two properties, width and height, and one method, calculateArea().
The calculateArea() method will take two parameters, width and height, and will return the area of the rectangle.
class Rectangle {
private $width;
private $height;
public function calculateArea($width, $height) {
return $width * $height;
}
}
Now that we have created our Rectangle class, we can create a program that will use it.
width = 5;
$rectangle->height = 3;
echo $rectangle->calculateArea();
}
}
This program will create a new instance of the Rectangle class, and set the width and height properties to 5 and 3, respectively. It will then call the calculateArea() method, and print the result to the screen.
When you run this program, you will see the following output:
15
