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I have a simple web page that has 3 tabs in my main content area. Once a user clicks on a particular tab, I use jquery and ajax to fetch some data from server and (of course) without reloading everything I change some div below those three tabs.

I use $.post to get data from the server and there are 3 different php files on a server that I call (one for each tab) and get data from.

Is it possible to start a php session when a user clicks on the first tab and save some $_SESSION variables and then use them when a user clicks on the second or third tab so that I know what user clicked on the second or third tab?

Thanks! Newman

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Yes, the sessions are shared across all php scripts. So whatever you save in the first tab will be readable on 2nd and 3rd tab. Keep in mind that

Edit: Thing to keep in mind here is that the domain should remain the same for all scripts to be able to see the session.

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Well, what I actually want is to store data that I get in php (trough shell_exec) and save it in $_SESSION array and display in other tabs. Is this possible?
i am not sure about the relevance of shell_exec here , prolly you can share your code?
Well, I wan to do something as simple as this: $_SESSION[mac]=shell_exec('ifconfig | awk '/eth0/ {print $5}' '); and then use this variable for something in other tabs.
well sure .. i can not guarantee if you would get any output from your shell_exec command, but if you do it should save perfectly in the session var and should be accessible in other tabs. If you are having issues make sure your shell_exec command returns valid output. Also make sure all tab scripts have session_start at the top of the script.
I know, I just wrote that from my head, syntax is definitely wrong :) But I was just wondering will this work just by using session_start() on in every php file. How is than session identified for different users?
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