page redirection using $_SERVER['HTTP_REFERER']?>

[murali]

hi,
I am trying to prevent the user from using the browser's back button so that I can above page expired msg.

Now to do that I have the following code
<script language='javascript'>
function gooBack()
{
var lastURL;
lastURL="<?echo $_SERVER['HTTP_REFERER']?>
document.location.replace(lastURL);
}
</script>

I use frames in my page. The above code works fine but for one condition. Now if I have a php page calling itself and from there if I call the homepage the entire homepage is listed in the current frame.
meaning I have the topframe also listed in my second frame.
is there any way to fix this?

[elToro]

Maybe you could do something like this in the JavaScript...

if (lastURL == "url-of-frameset")
{
   document.location.replace("url-of-main-frame");
}

...subsituting the actual values, of course.

[Truti]

Use some php headers!

If you use all the headers in a row, there is not manny browsers there try to save the file (last file!)

header("Expires Date in the future");
header("last-Modified: " . gmdate("D, d M Y H:i:s") . "GMT");
header("Cache-Controle: no-cache, must-revalidate");
header("Progma: no-cache");

Truti