How can using variables for function arguments in PHP improve code readability and maintainability?

Using variables for function arguments in PHP can improve code readability and maintainability by making it clear what values are being passed into the function. This can help other developers quickly understand the purpose of the function and how it should be used. Additionally, using variables allows for easier modification of function arguments in the future, as you only need to update the variable value rather than every instance of the argument in the function call. 

// Before using variables for function arguments
function calculateTotal($price, $quantity) {
    return $price * $quantity;
}

$total = calculateTotal(10, 5);

// After using variables for function arguments
$price = 10;
$quantity = 5;

function calculateTotal($price, $quantity) {
    return $price * $quantity;
}

$total = calculateTotal($price, $quantity);

Keywords

variables function arguments PHP code readability maintainability

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