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Re: how to unset session variable when leaving page [message #174689 is a reply to message #174687]

Tue, 28 June 2011 03:03

Mick Gurling
Messages: 2
Registered: June 2011

Karma:

Junior Member

We Proxima Centaurians would never do that!
We like Earthlings
(Especially with onions and a little Franks Red Hot Sauce).

On Mon, 27 Jun 2011 22:41:25 +0000, Doug Miller wrote:

> In article
> <fdb4f334-c961-4c2c-809e-819767790b5c(at)x12g2000yql(dot)googlegroups(dot)com>, Co
> <vonclausowitz(at)gmail(dot)com> wrote: [snip lots of irrelevant stuff]
>> Is it possible to clear the session var when leaving the page?
>
> No. Think about it: your PHP script runs on *your server*. Suppose I'm
> visiting your web site, then navigate away to, say, Google. That page is
> served by *Google's* server -- how do you imagine that it might be
> possible for your server to know that I did that?
>
> The *only* thing your PHP script knows about is what gets sent to it
> from the browser. There is no way at all by which your script can tell
> the difference between these scenarios, because *none* of them result in
> the browser sending anything to your script:
> a) Your page is still displayed on my screen and I'm looking at it; b)
> Your page is still displayed on my screen, but I'm no longer looking at
> it because I stepped out for coffee;
> c) Your page is still open in my browser but I'm no longer looking at it
> because I'm watching something more interesting in a different tab; d)
> Your page is no longer displayed on my screen because I navigated to
> some other web site;
> e) Your page is no longer displayed on my screen because I turned my
> computer off and went to bed;
> f) Your page is no longer displayed on my screen because alien invaders
> from Proxima Centauri have reduced my entire city to a glowing heap of
> radioactive slag.

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[Message index]

		how to unset session variable when leaving page By: Co on Mon, 27 June 2011 18:35
		Re: how to unset session variable when leaving page By: Jerry Stuckle on Mon, 27 June 2011 21:29
		Re: how to unset session variable when leaving page By: unknown on Tue, 28 June 2011 23:31
		Re: how to unset session variable when leaving page By: Jerry Stuckle on Wed, 29 June 2011 00:23
		Re: how to unset session variable when leaving page By: dougatmilmacdotcom on Mon, 27 June 2011 22:41
		Re: how to unset session variable when leaving page By: Mick Gurling on Tue, 28 June 2011 03:03

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