CMS Made Simple Forums

I am creating an action that can be called either from backend or from frontend, but in each of the contexts it must behave slightly differently. Namely, in the backend I don't need to check for Front End Users permissions.

My question is, how do I tell if the action was called with an URL in the Front End or in the Back End?

in the backend, $returnid is empty.

Thank you!

True Calguy, and also, in the frontend there is no $smarty.get.sp_ var