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

3554	 * @param string      $url     The complete site URL including scheme and path.3555	 * @param string      $path    Path relative to the site URL. Blank string if no path is specified.3556	 * @param string|null $scheme  Scheme to give the site URL context. Accepts 'http', 'https', 'login',3557	 *                             'login_post', 'admin', 'relative' or null.3558	 * @param int|null    $blog_id Site ID, or null for the current site.3559	 */3560	return apply_filters( 'site_url', $url, $path, $scheme, $blog_id );3561}3562 3563/**3564 * Retrieves the URL to the admin area for the current site.3565 *3566 * @since 2.6.0