title: Dynamic Paypal button encryption
body: <p>I'm designing a Order Site using PHP &amp; 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 variables.
  These values being variables, I cannot use an encrypted button from Paypal. I'll have to use either a non-encrypted button or encrypt it before showing it to the user.</p>
  
  <p>I wish to encrypt it for security reasons. I would like to know how to do it on my server.</p>