get_dirsize( string $directory, int $max_execution_time = null ): int|false|null

8674function get_dirsize( $directory, $max_execution_time = null ) {8675 8676	/*8677	 * Exclude individual site directories from the total when checking the main site of a network,8678	 * as they are subdirectories and should not be counted.8679	 */8680	if ( is_multisite() && is_main_site() ) {8681		$size = recurse_dirsize( $directory, $directory . '/sites', $max_execution_time );8682	} else {8683		$size = recurse_dirsize( $directory, null, $max_execution_time );8684	}8685 8686	return $size;8687}