CODEWITHSUNDEEP
phpbuttonencryptionpaypal
Volomike
Volomike

Reputation: 24886

How do I make a PayPal encrypted buy now button with custom fields?

Is there a way that my PHP code can generate an encrypted BuyNow button that also includes custom fields and also implements an IPN URL and redirect page?

Upvotes: 1

Views: 2393

Answers (2)

TeAmEr
TeAmEr

Reputation: 4773

in the encrypted buttons theres is one field called 'custom', you can serialize an array into it and it will be returned to your IPN :)

Upvotes: 0

Volomike
Volomike

Reputation: 24886

You don't have to encrypt. Simply take the 'custom' variable, and, among other things you might need to put in there, add a hash of the price and product number, like so:

$sCustom .= '|' . md5($sSalt . $sProduct . $sPrice);

Then, when the IPN is processed, ensure that this hash was not disturbed with what is received back. If it was, then block the transaction.

Upvotes: 3

Related Questions