create account after first order, then add order to order history

I have added a button to the checkout success page, to enable a customer, who doesn't yet have an account, to create one, using their name and billing details from the latest transaction.

However, at the point the order was placed, the customer had no account details, so the order wasn't associated with them, therefore will not appear in their order history.

My thought was, store the session_id in the form to be posted with the other details, so I can update the orders table after the new account is created. The form is then populated, just before my session is killed.

However, though my other form fields are successfully posted to my registration page, the session id isn't.

all i am doing is a simple echo $_POST['fieldname']

to be able to create the order history, the customer should be creating the account before they place the order, not after. it's rather backwards to create the account after the order is placed.


as for the form element not having a value the checkout success page, that is to be expected.

the confirm page is set to post to itself, process the transaction, then redirect to the success page.

the form data is only available to the forms action page. once the action page is done loading or redirects to another p[age, the form data is not longer available.

there is no post being made to the success page.

once the success page loads and the session is cleared. there is no way to tie the order to the user