How does the use of functions in PHP contribute to code reusability and maintainability?

Using functions in PHP allows us to encapsulate a specific set of instructions into a reusable block of code. This improves code reusability by allowing us to call the function whenever we need to perform that set of instructions, instead of rewriting the code each time. Additionally, functions help to improve maintainability by promoting modular code organization, making it easier to update or debug specific functionality without affecting other parts of the code. 

// Example of a function in PHP for calculating the area of a rectangle
function calculateRectangleArea($length, $width) {
    $area = $length * $width;
    return $area;
}

// Calling the function to calculate the area of a rectangle
$rectangleArea = calculateRectangleArea(5, 10);
echo "The area of the rectangle is: " . $rectangleArea;

Keywords

PHP functions code reusability maintainability software development modularity

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