On Tuesday 02 April 2002 16:59, Erik Price wrote:
> On Thursday, March 28, 2002, at 06:50 PM, Michael Virnstein wrote:
> > This is not possible. You cannot force the browser
> > not to go back in its history, don't even trie to find a solution for
> > this...
> > the question you should ask yourself is not how to disable the browser
> > history
> > but how you can prevent your page by getting screwed by multiple posts.
>
> I see. Then, when I try to do something similar to this on FedEx.com or
> Amazon.com, is it JavaScript that redirects me to an error page? If so
> then I will have to use both tactics -- preventing a form from being
> resubmit, and JavaScript to "disable" the back button (unethical as it
> may be).
i dont know if this really would solve your problem, but what i am using
sometimes is:
if( $save_data )
{
$id = save( $_REQUEST['data'] );
if( $id != false ) // is it a valid id?
{
header('Location:'.$_SERVER['PHP_SELF'].'?id='.$id );
die();
}
}
explaination: what it does is saving the $_REQUEST['data'] and on success, it
reloads the same page again but without the posted data to show exactly the
data that had been saved i use the $id returned by the 'save'-method, which
is the id of the data set that was saved
so reload or back buttons wont disturb
on reload, simply the same page with the GET-param is reloaded
and back button goes to the page before, since it seems the
"header"-redirection is not saved in the history
this only works for special cases:
- if you load the same page again, and want to show the entered data, it has
to be the same page for showing and editing the data
- showing data also has to work using $_GET-parameters, as this is what the
"header" function does
drawbacks are:
- only useful in some special cases
- browser gets contacted once more, than actually necessary ('header')
--
Wolfram
... translating template engine ....
http://sf.net/projects/simpletpl
... authentication system ....
http://sf.net/projects/auth
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