Paypal integration with IPN

Avg Bid (CAD)
Project Budget (CAD)
$15 - $60

Project Description:
I need paypal to sell digitals files, protecting my file url and add purchased file in a MySQL table:
Paypal button will be displayed on my website with my prices , file ID and file type variables for each file (I have 4 differents file extension for the same thing but at different prices..
When someone buy a file, the paypal script must verified if the payment has been made and match the price.
Paypal IPN will send a message to a listener who will add the purchase in a mysql table (id, file_id, date) and redirect the buyer to a download page.

Download page must hide the real url of my files. No one must be able to find where the files are located.
IMPORTANT: Protect file locations! Hides the URL of files! Limit downloads ( Maximum 3 ). Set the number of times that a customer is allowed to download a file ( 24 hours).

PM for more info, also I will send you my website url if you got the job.

Skills required:
MySQL, Paypal API, PHP
About the employer:
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