PayPal IPN Script PHP

The job is to write a PayPal IPN script for our website that will: 1.) Send out an e-mail if a sale happens. Here you have to read a out a license key from a mysql database, where the flag "used" is "False". after reading the key, set the flag "used" to "True" in the database. 2.) Write all data into a PayPal table in mysql database. Include the license key here if a sale happen. Only send e-mail with real purchases. Not refunds, claims or open payments. To Do: - Make a PHP Script - Make a MYSQL script to create license key table. - Make a MYSQL script to create PayPal table - Little Admin PHP page where we can see all listings from PayPal table. (25 each page). With navigation. Find function on this page to find with license key or e-mail. Secured by login. - Little script to submit a textfile with license keys to the license key table. PHP script will run on a Windows Server.