NYCPHP Meetup

[Oktay Altunergil]

Might you be referring to a 'session expired' issues rather than the 'page expired' issue caused by trying to post a form twice ? If not, please elaborate cause I don't see how this method will fix the latter.

Oktay

On Mon, 05 Aug 2002 12:39:35 -0400
Carlos A Hoyos <cahoyos at us.ibm.com> wrote:

> 
> 
> I once wrote a task managing application where users would login to see in
> the home page a queue of incoming tasks and work on them.
> Many users would hit the refresh button on home page, or hit the back
> button after reading a task, and because the home page was reached after a
> login screen (username & password posted), they would get the "page has
> expired message", very annoying.
> 
> The way I solved it:
> 1- I coded an authenticate function: User name & password get validated,
> and if OK, some important user data gets saved as session variables.
> 2- On top of each page, I call a validate function that starts the session
> and checks the session variables in (1). If they're not registered, it will
> display login page, otherwise continues with validation (acls,
> initialization, etc....)
> 
> When user first logins (in index.php), I get their username/password via a
> POST form. If authentication (2) returns true, I use "header" to forward
> them to the mainpage (main.php), free of all forms and thus, free of the
> "expired" problem when refresh/back buttons are hit.
> 
> Because on top of mainpage validation function gets called, nobody can
> access it without passing first through authentication.
> 
> 
> 
> So, you can save your post variables (either in the DB with session as a
> key, or link them to session variables (as cookies)) and then send a header
> that forwards to a new php page that will fetch your variables and display
> the page. Since this new page would not be associated to any post action --
> your variables came from the DB, not from post --, reloading or going out
> and back in with the back button will not give any "expired" problem.
> 
> Voila!!!!
> 
> 
> 
> 
> 
>