count down

Anon

I have a script that I want to limit the amount of time a visitor can stay on it.

Say 2 hours.

After that, the visitor will be forced to leave by sending a new header, meta refresh, or whatever. I'll figure out that later.

My problem is how do I get the script to countdown.

Say the user visits at 8:00am. the user can only stay 'till 10:00am.

I know php is a bad way of doing this, but I would like to use javascript/php.

javascript will do a live countdown. When time is up, the next time the visitor clicks on a link or refreshes the page, the script will send the user elsewere.

How can I get javascript and php to work together, assigning variables, etc..

Please help me out with the coding. If you have other ideas, that would be great too!

I tried using cookies, but I send out header information before I call my cookies and I can't send header information before. I dont' feel like re-writing my code either.

Anon

"I tried using cookies, but I send out header information before I call my cookies and I can't send header information before. I dont' feel like re-writing my code either."

I can't send header information after the cookie because of my authentication method.

Anon

I found a javascript code that counts down the amount of seconds requested.

How can I get the remaining time into a query string.

eg.
$time_left = 7200; //start with 2 hrs

</form>
</body>

Can anyone help me with this?

[deleted]

You can access cookies at any point in your script.
Only the setcookie() sends headers.

So, just set a cookie at the first access to your site.
From then on, allways check if that cookie is set.

In the cookie you store the time that the user logged on.
On every page, you compare the cookie time with the current time. If four hours have passed, deny access.

The problem is, at which point will you let a user back into your site?

Also, this system is peanuts to crack. All a hacker has to do is forge a cookie. Not difficult.