php cache save

[supernatural_247]

Please see: http://www.projectors411.com/project...ifications.php

If you select any manufacturer and then a model and then click submit, it will show the specs. But then if you click your browser's back button, it shows this error:

Warning: Page has Expired The page you requested was created using information you submitted in a form. This page is no longer available. As a security precaution, Internet Explorer does not automatically resubmit your information for you.

To resubmit your information and view this Web page, click the Refresh button.

How do I get rid of this message and show the dropdown forms again?

[brian.mark]

The problem is in your headers. Either your Apache server is configured odd or you're doing something in PHP to rewrite some of the headers.

HTTP/1.1�200�OK(CR)(LF)
Date:�Fri,�02�Sep�2005�02:18:07�GMT(CR)(LF)
Server:�Apache(CR)(LF)
X-Powered-By:�PHP/4.4.0(CR)(LF)
Set-Cookie:�PHPSESSID=941f4ec96644f325395db1cbcf2ee1ac;�path=/(CR)(LF)
Expires:�Thu,�19�Nov�1981�08:52:00�GMT(CR)(LF)
Cache-Control:�no-store,�no-cache,�must-revalidate,�post-check=0,�pre-check=0(CR)(LF)
Pragma:�no-cache(CR)(LF)
Connection:�close(CR)(LF)
Transfer-Encoding:�chunked(CR)(LF)
Content-Type:�text/html(CR)(LF)
(CR)(LF)

Those are your headers. The no-cache, cache-control, and expires all need to be removed if you want the back button to work properly.

Once you've made some changes and want to test what it returns, try loading your page again with this tool. Very simple, but it works well.

Brian.