Clearing the previous output when pressing the back button

[no_maam]

Hi folks! How do i get the browser to refresh the page (so the previous output isn't shown) when pressing the back button ? I tryed with meta refresh but i need the page to be refreshed only once .
Thanks.

[microbluechip]

This is due to the browser caching the HTML from the previous page and displaying this to you rather than re-executing the page. As far I am aware if you disable the cache you will simply get a page expired message. The only way is to link back to the page in order to re-execute it. The back button is a pain to script around.

[no_maam]

Is there a way of using <META HTTP-EQUIV="Refresh" ;URL=.... > to refresh the page only once ?

[TheDefender]

You can use an IF/ESLE to check the referring page and use a header() element to reload the page if the referring page is the one you are posting to. Of course, you would have to do this at the start of your script before anything is sent to the browser, but it is an option.

[no_maam]

@
Its an option. I guess there aren't any elegant solutions to this problem.

[TheDefender]

No, not really.

[crimaniak]

RULE:
If your page process any data entered by user it sould not display any output. Just process data and redirect using header('Location:...).
Requests to process data and requests to display pages must be fully separated.