So I have a web app that was running fine on my old server with my old hosting company.
Moved to a dedicated server yesterday, new IP, new name servers for the domain.
The name server changes haven't fully propagated but on my laptop I can get to it through the fully qualified domain. On my desktop, I have to use the IP.
Problem is, when I log in to the web app either through the IP or domain, if I click on another users profile, the userid cookie (session variable) that's set on login gets changed to the userid of the profile I just clicked on. This never happened before the move and I'm wondering if it's cookie funkiness because the name server and IP change hasn't fully propagated yet. I can't see anywhere in the code where this could happen.
It's happening with other session variables as well. I'm not sure what it could be as the server configs are the same (php version, mysql version) and I just moved all the files and data over to the new server
I know all this is pretty vague but I thought I'd see if anyone knew what I was talking or has heard of something like this happening before.
Ready to panic over here O_o
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I figured it out:
register_globals was set to "on" on the new server and was "off" on the old server.
http://us2.php.net/registe
That is a nasty, nasty config option I had no idea about.
Basically, I would set the $_SESSION["userid"] when a user logged in and when I set the page variable $userid, it would also change the session variable.
That is some crazy behavior and I don't know why anyone would want it enabled.
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by: mrcoffee365Posted on 2008-02-27 at 13:05:37ID: 20998386
Name changes and hosting changes can make cookies disappear, for example if they aren't returned to the new server because network routing hasn't propagated completely yet.
What they can't do is make your code behave differently, or change the data in a cookie.
So -- something is different.
Are you _sure_ that your click of a different user causes the change in your cookie data? There could be 2 different cookies, for the 2 domains, and sometimes you see one, and sometimes the other.
Or your code on the server could be behaving differently, even though you can't find where that's happening.
If you post the before and after cookies, then we might be able to help with further debugging. That is, the cookie that has one value from one browser from one machine, you click on a link on a page on that machine, and the cookie has a different value.