I would like to build a few .php pages in order to process a form and then present API errors and thank-yous. Is that possible on the WP CMS? What would I need to do in order to make that happen?
As an alternative solution, I would like to process a form wholly within a WordPress page. Is it possible to have wordpress php functions and other php notation on the same page? For example, may I start a session before the header is called?