What is the DRY (Don't Repeat Yourself) principle and how does it apply to PHP programming?

The DRY (Don't Repeat Yourself) principle is a software development principle that states that duplication in logic should be minimized by abstraction; every piece of knowledge must have a single, unambiguous representation within a system. In PHP programming, this means avoiding repeating the same code or logic in multiple places within your codebase by creating reusable functions or classes. 

// Example of applying the DRY principle in PHP
function calculateArea($length, $width) {
    return $length * $width;
}

$rectangle1Area = calculateArea(5, 10);
$rectangle2Area = calculateArea(8, 12);

Keywords

DRY principle PHP programming code duplication reusable functions maintainability

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