In PHP, how do I create arrays with strong typing?

In PHP, to create arrays with strong typing, we can make use of type hints and return types. Here's an example:


        <?php
        declare(strict_types=1);

        function createIntArray(array $numbers): array {
            foreach ($numbers as $number) {
                if (!is_int($number)) {
                    throw new InvalidArgumentException('All elements must be integers.');
                }
            }
            return $numbers;
        }

        $myArray = createIntArray([1, 2, 3, 4]);
        print_r($myArray);
        ?>