Apache, PHP: send filename through $_GET

Question

Hello,

I'm having an upload Java applet to handle large files upload. The use of this upload is mandatory, so dropping it is not an option. The problem is that, after the upload, the applet redirects to a given url and sends some info through $_GET. I can't change that ( the sending method, the params order ). And the last param sent is the filename. So the redirect link looks like this :

index.php?page=editions&action=save&idPublications=1&filename=filename.pdf

Now, the problem is that the Apache handles this link like it was a PDF file ( raises 404 error ), not index.php with lots of query params. If instead of filename.pdf I have some other type of file it works perfectly. I tried some tricks with the .htaccess, I'm guessing that's where I should work, but not really experienced.

Any ideas ?

Regards,

Gabriel Poama-Neagra