How can object-oriented programming principles be applied to enhance the functionality and efficiency of the provided PHP code?

Issue: The provided PHP code lacks proper organization and structure, making it difficult to maintain and extend. By applying object-oriented programming principles such as encapsulation, inheritance, and polymorphism, we can enhance the functionality and efficiency of the code. 

<?php
// Define a class for better organization and encapsulation
class Calculator {
    // Add methods to perform calculations
    public function add($num1, $num2) {
        return $num1 + $num2;
    }

    public function subtract($num1, $num2) {
        return $num1 - $num2;
    }

    public function multiply($num1, $num2) {
        return $num1 * $num2;
    }

    public function divide($num1, $num2) {
        if ($num2 == 0) {
            return "Cannot divide by zero";
        }
        return $num1 / $num2;
    }
}

// Create an instance of the Calculator class
$calculator = new Calculator();

// Use the methods of the Calculator class to perform calculations
echo $calculator->add(5, 3); // Output: 8
echo $calculator->subtract(5, 3); // Output: 2
echo $calculator->multiply(5, 3); // Output: 15
echo $calculator->divide(6, 3); // Output: 2
?>

Keywords

Object-oriented programming PHP code functionality efficiency libraries

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