[PHP] POST Referral

[Boget, Chris]

Is it possible, in PHP, for a page to determine if it
was accessed via a form's submission (POST/GET)?

IOW, if you click on a link to get to a page, you can
find out (usually; I know it's not 100%) what page
the user was at before when s/he clicked the link by
accessing the $HTTP_REFERER variable.  Is there
any way to do the same type of check but determine
if it was due to the submission of a form (instead of
by a link as $HTTP_REFERER would suggest)?

Thanks!

Chris