Why is it important to separate application logic and output logic in PHP development?

It is important to separate application logic and output logic in PHP development to improve code readability, maintainability, and scalability. By separating these concerns, it becomes easier to make changes to the application logic without affecting the output logic, and vice versa. This separation also allows for better testing and debugging of the code. 

<?php
// Application logic
function calculateTotal($price, $quantity) {
    return $price * $quantity;
}

// Output logic
$price = 10;
$quantity = 5;
$total = calculateTotal($price, $quantity);

echo "Total: $" . $total;
?>

Keywords

MVC separation of concerns code maintainability security vulnerabilities XSS attacks

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