How can type hints improve the code in the PHP forum thread?

The issue in the PHP forum thread is the lack of type hints in the function parameters, which can lead to potential bugs and make the code harder to understand. By adding type hints, we can improve code readability, catch errors early, and make the code more maintainable.

function calculateSum(int $num1, int $num2): int {
    return $num1 + $num2;
}