I need to be able to delete a user's session (force him to login again). E.g. I want to delete and ban the user from my site, but even if I delete his data from the DB his session will be still active and thus he can continue to be active on the site until he logs out and tries to log in again.
How should I find and delete the session of a currently logged in user?
Sessions are stored on the filesystem and I'd like to keep it that way.
Thanks, Hamlet