a la ViewState in PHP5?

> Hello,
> I need your help in some programming problem. I have little experience
> in web programming.
> I have a page index.php (with announcements form). There is a button
> opening page print.php (with printout of announcement) containing data
> from $_POST (the data may not exist in database because printout can
> be done before submit).
> I would like such functionality: when user presses Back button, the
> page index.php should appear with data previously entered.
> I am not sure but it seems to me that in .NET there is ViewState
> mechanism for such things. As far as I know ViewState is not
> implemented in PHP.
> Thus, this is how I imagine the solution:
>
> print.php:
> collects $_POST data in $_SESSION;
> displays announcement printout using $_POST data
>
> index.php:
> fills in the announcement form using $_SESSION data, but if there's
> no such data, empty form is displayed
>
> Is it OK? Do you see better solution?

> Better is to use a browser (such as FireFox) which does remember the
> data entered also, and displays it with the page when the back button is
> pressed.

>> Better is to use a browser (such as FireFox) which does remember the
>> data entered also, and displays it with the page when the back button is
>> pressed.
> I don't know which browser the user will use.
> BTW, I use Firefox and it does not display entered data when back
> button is pressed.
>
> How do you like another solution of my problem: to show
> print_announcement.php in another window using window.open() function?

>BTW, I use Firefox and it does not display entered data when back
>button is pressed.