Dynamic Paypal button encryption

Question

I\'m designing a Order Site using PHP & Mysql. In the final stage the user is given Paypal buttons to pay for the Orders he has made. So, the Item Name, Value are variab

Answer 1

The only way you can do this is by dynamically querying PayPal to encrypt the button each time.

However this method is not efficient, I think it would be much better to use PayPal IPN. There are many examples and classes online on how to do this.