How can the readability and maintainability of the code be improved through proper indentation and coding style?

Proper indentation and coding style can greatly improve the readability and maintainability of code by making it easier to follow the logic and structure of the code. This can be achieved by consistently using indentation to show the hierarchy of code blocks, using clear and descriptive variable names, and following a consistent coding style guide.

// Example of properly indented and styled PHP code
function calculateTotal($price, $quantity) {
    $subtotal = $price * $quantity;
    $taxRate = 0.08;
    $tax = $subtotal * $taxRate;
    $total = $subtotal + $tax;

    return $total;
}