Have you had experience using standard hints in PHP to clarify data types?

In PHP, type hints allow explicitly specifying the expected type of function arguments or return values. This helps prevent errors and improves code readability.

Example of using type hints:

function sum(int $a, int $b): int {
    return $a + $b;
}

echo sum(5, 10); // 15
// sum('5', '10'); // will cause an error if strict types are enabled

Since PHP 7, you can specify types for scalar values (int, float, string, bool), as well as for classes, interfaces, arrays, and callable. Enabling strict types (declare(strict_types=1);) makes PHP strictly check types.