exit script

Anon

hi, how do i set a script to do something when the user exits out of the site?

dopefish

Trying to clarify what you want to do:

You have a link on one of your pages (yourserver.com/links.php) to some other server (otherserver.com/aaa.htm), and when the user clicks the link, you want to send them one last page/message before they go to otherserver.com. Is this right?

If so: Change your link from:
<a href="http://otherserver.com/aaa.htm">link</a>
to:
<a href="redirect.php?link=http://otherserver.com/aaa.htm">link</a>

redirect.php will contain your action or 'goodbye' message. You can use a META REFRESH to automatically bounce the user:
<?
print("<meta http-equiv=\"refresh\" content=\"10;URL=$link\">");
//(goodbye message/action here)
?>

Does that make sense?

Anon

No. That's not what I'm trying to do. For example:

Someone comes to my site, they are added to a DB, once they leave, they are removed. I got the adding part but I don't know how to do the removing part.
I want it so even if they just push ALT + F4, it removes them. Or even if they're computer crashes, anything. How do I do this?

jrottman

The only possible way to do this is to use html:

That page will load up, like a popup, and remove them, but they also could close the page before it removes them. What you are trying to do will not work and is a bad idea. Depending on what you are trying, use cookies.

Jason Rottman
Webmaster
Project Manager
www.stardefenders.com

Anon

I'm trying to make a counter kinda.
It displays how many people are on the site at the very moment.

kparker

You know, this idea has been rehashed so many times here it's not funny. :-) The short version is, you can't do exactly what you want, because of the stateless nature of http. What most people do as a substitute is to timestamp every logged-in page load in the user table, and then at periodic intervals (e.g. every 5 minutes) remove everyone who hasn't had a new page load since last time. This gives the count of people who have looked at pages in the last N minutes, but often the designer plays fast and loose and presents it as simple The Count of Users Logged In.

As a side issue, one thing no one has ever bothered to explain is why you would even want to do this. It sure doesn't bother me not to know this information about phpbuilder itself, for example.