apply_filters( 'admin_url', string $url, string $path, int|null $blog_id, string|null $scheme )

3593	 * @param string      $url     The complete admin area URL including scheme and path.3594	 * @param string      $path    Path relative to the admin area URL. Blank string if no path is specified.3595	 * @param int|null    $blog_id Site ID, or null for the current site.3596	 * @param string|null $scheme  The scheme to use. Accepts 'http', 'https',3597	 *                             'admin', or null. Default 'admin', which obeys force_ssl_admin() and is_ssl().3598	 */3599	return apply_filters( 'admin_url', $url, $path, $blog_id, $scheme );3600}3601 3602/**3603 * Retrieves the URL to the includes directory.3604 *3605 * @since 2.6.0