I'm working on a custom checkout page and am trying to figure out two things.
1. How can I check to see if the user is signed in from a custom checkout page? I'm using the SSO method to verify if they're a user, but I'm not sure how to check any of the data from the custom cart theme I'm laying out. Does it cache PHP or just HTML/CSS?
2. Assuming you can access the FoxyCart session data, are the session fields similar to what's called through the API? For instance, is customer first name "customer_last_name"? The session variables page in the wiki discusses transaction data, but not user data.