Configure PayPal ipn response -- 2

Second Posting Due to Incompletion ( Urgent Requirement ) Please do not bid if you are unable to deliver this before the end of Sat 5th September. Hi Everyone, I have setup a php mysql system and need help setting up a script to receive the PayPal response and send order number once paid to a Php page which handles emailing invoice to customer. At the moment once I receive PayPal email, I have to manually enter the order number into a php script which then sends end user their confirmation email using data from MySQL <form action="[login to view URL]" method="post"> <p>Booking Ref: <input type="text" name="invoice" /></p> <p>payment_status: <input type="text" name="payment_status" value="Completed" /></p> <p>User Mail: <input type="text" name="UzrMail" /></p> <p><input type="submit" /></p> </form> So I need the following: 1 setup the PayPal ipn or api script. 2. Create sequential PayPal booking reference 3. Send order reference to email script Our current paypal button is atached: I need this setup on my test production server first and you will need to provide details of what would be required to move to live server upon successful live tests are completed. Thanks for taking time to review this project.