I have a deposit page where people can deposit money on their accounts, but I would like to extend this with other payment methods and also I don't want to have certain information in the form visible to people (those who now how to manipulate form data using firebug).

So I want to submit the form to a confirmation page where the data is processed and where new data is added like the paypal e-mail and the IPN link that needs to be send to, and only then redirected to paypal.

is there php code I can use to submit the form immediatly once the data is processed? or should this be done in the meta tag or something like that?