The script does not work.

The script does not work. "test.php" file missing as requested in the form.

haha, bad joke man.

You're right, test.php is missing, but that don't mean the script generally doesn't work!

Make your own test.php with this content:

<?php

include("encoder.class.inc.php");

if(isset($_POST['file'])):
$encoder = new Encode;
$encoder->encode($_POST['file']);
else:
die("no file given!");
endif;

?>

Don't use a directory name, i think it won't work, i can't see special code for reading and encoding files of a directory recursively.

$uncompressed = gzuncompress($compressed_string);