# $extra: (optional) a function to be called right before tar-ing.
function make_tar($dirname, $files, $pre_archive_func = false, $tmpdir = false) {
if(!$tmpdir) {
# $extra: (optional) a function to be called right before tar-ing.
function make_tar($dirname, $files, $pre_archive_func = false, $tmpdir = false) {
if(!$tmpdir) {