PHP Program to Find Area and Perimeter of Rectangle

Calculating the area and perimeter of a rectangle is a fundamental geometric operation. The area of a rectangle is given by the formula Area = length * width, and the perimeter is given by Perimeter = 2 * (length + width). In this article, we will explore how to calculate the area and perimeter of a rectangle in PHP using different approaches.

Area and Perimeter of Rectangle using Functions

Calculating the area and perimeter of a rectangle is by defining separate functions for each calculation, namely calculateArea and calculatePerimeter.

Example: Illustration of calculating the area and perimeter of a rectangle in PHP using functions.

PHP

<?php

// To calculate area
function calculateArea($length, $width) {
    return $length * $width;
}

// To calculate perimeter
function calculatePerimeter($length, $width) {
    return 2 * ($length + $width);
}

// Given values
$length = 10;
$width = 5;

$area = calculateArea($length, $width);
$perimeter = calculatePerimeter($length, $width);

echo "Area of Rectangle: $area\n";
echo "Perimeter of Rectangle: $perimeter";

?>

Output

Area of Rectangle: 50
Perimeter of Rectangle: 30

Time Complexity: O(1)

Auxiliary Space: O(1)

Area and Perimeter of Rectangle using a Class

Calculating the area and perimeter of a rectangle is by defining a class to represent a rectangle and including separate methods for calculating the area and perimeter, namely calculateArea and calculatePerimeter .

Example: Illustration of calculating the area and perimeter of a rectangle in PHP using classes.

PHP

<?php

class Rectangle {
    public $length;
    public $width;

    public function __construct($length, $width) {
        $this->length = $length;
        $this->width = $width;
    }

      // To calculate the area
    public function calculateArea() {
        return $this->length * $this->width;
    }

      // To calculate the area
    public function calculatePerimeter() {
        return 2 * ($this->length + $this->width);
    }
}

// Driver code
$rectangle = new Rectangle(10, 5);

$area = $rectangle->calculateArea();
$perimeter = $rectangle->calculatePerimeter();

echo "Area of the rectangle: $area\n";
echo "Perimeter of the rectangle: $perimeter";

?>

Output

Area of the rectangle: 50
Perimeter of the rectangle: 30

Time Complexity: O(1)

Auxiliary Space: O(1)