This type of file download script I have used in most of my web application. When you want to download any file you need to send the file name to this application, rest of the thing PHP will handle.

download.php
index.php
files\make-Zip-in-PHP.jpg
.....\PHP-file-download-script.jpg
.....\tick.jpg
.....\webinfopedia.txt
files

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．