Upload Problem

I have created an upload system for desktop users to upload files on my directory. The code was working properly on local server and other hosts but when I tried here, the code is not working. When I click it shows a blank page
here is the link
http://solutiongeek.in/donate%20us.php

Building files sharing hosting is forbidden here.

I just want to collect pdf files from my users, are they going to allow me for this?

@download said:
I just want to collect pdf files from my users, are they going to allow me for this?

Not really. Especially if “your users” are literally anyone on the internet who knows the URL. Because that’s what you currently have presented. If you heavily restrict uploading to a limited number of files and file types, and only to previously invited users, then it could be OK. But what you’ve created here is a public file sharing site.