<?php declare(strict_types = 1);

/**
 * @see http://php.net/date
 * @phpstan-param non-empty-string&literal-string $format
 * @phpstan-return non-empty-string
 */
function date_wrapper(string $format, int $timestamp = null): string
{
	if ($timestamp !== null) {
		return \date($format, $timestamp);
	}

	return \date($format);
}