NYCPHP Meetup

[David Krings]

Hi,

    you need to set the page to not getting cached by a browser. I once 
looked this up and found several sources that claim that these two lines 
at the beginning of a page will turn caching off:
header("Cache-control: private");
header('P3P: CP="NOI ADM DEV PSAi COM NAV OUR OTRo STP IND DEM"');

 From what I can tell, this works. But to be honest, I have no idea what 
this really does or if it does anything, especially the second line. 
Writing this kinda makes me want to know more about it, so I did a quick 
google and found http://www.w3.org/P3P/ that has some more info. The 
first line is most likely needed to pass on the cache preferences 
through the header rather than take the browser default.

    Hope this helps,

             David

Aaron Fischer wrote:
> Howdy,
>
> I have a logout page where I destroy the session.  However, if I click 
> one of the application links it lets me back in.  I believe the 
> browser is loading the application page from history.  If I refresh 
> the page it kicks me out to the login page, which is the desired 
> behavior but I would like that to happen right away.
>
> How do I ensure that my application pages are loading a fresh copy?  
> If I can make that happen then presumably it will prevent this issue.
>
> The strange thing is that this doesn't seem to happen for another 
> application I built but I haven't been able to find a difference in 
> the code I wrote.  (Am testing both in the same browser.)
>
> Thanks,
>
> -Aaron
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