Hi, I am looking to use gravity forms to dynamically build a paypal invoice. I would like certain fields to be populated dynamically using a post's fields. For the invoice I require the item name to be the post title, and the item price to be pulled from a custom field called "price". As well, I don't want the visitor to be able to change the value obviously.
I was told the following, but am not sure of how to do this: "Use custom PHP and Gravity Forms hooks to dynamically populate those fields. You also have to do it in such a way that it doesn't trigger Gravity Forms built in pricing security which prevents users from tampering with prices by manipulating the form data"
I can't seem to get this to work and would appreciate any suggestions. Thanks!