if ($filename == $file . '.tgz') return 'application/x-tar-gz';
$file = basename($filename, '.gz');
if ($filename == $file . '.gz') return 'application/x-gzip';
if ($filename == $file . '.tgz') return 'application/x-tar-gz';
$file = basename($filename, '.gz');
if ($filename == $file . '.gz') return 'application/x-gzip';