I have a web site using a PHP and HTML. I would like one of the PHP scripts modified.

The script that I need modified is the sinnin.php which includes the payment to PayPal. The admin.php script would probably need to be modified also.

Now, I set the monthly fee in the admin panel. I also set a monthly or yearly payment. I use the yearly.

I would like to have ten codes and discount amounts added to the admin panel that I can change easily whenever necessary.

Then I would like a box in the sign up form which would be titled "promotional code". When a person is signing up, they will be able to add the promotion code and receive the corresponding discount on the price.