session expiry between browser and after browser or system shutdown?

I am in need of session variable must be exist even after browser closed or system shutdown. But in my page it will not support session scope between browsers that is at first i signin with firefox while i login with chrome browser it comes to 开发者_StackOverflow社区login page . Why these happen . Please any body help me to solve this problem.

Thanks and Regards, Alagar Pandi.P alagar.pandi@gmail.com

Session scope between browsers is not possible. Sessions are identified by a token, which must first be given to the user, and then passed back later by the browser in some form. Generally this is done with cookies, although it can also be done by appending the token to URLs as the visitor browses around the site.

Since web browsers are separate pieces of software with their own methods of handling cookies, you cannot share cookies between browsers, and therefore you cannot share cookie-based sessions. It is possible to copy-and-paste a URL from a web site that contains a session token into another browser and continue the session there, but most sites use cookies, so this is not often possible, and it certainly doesn't accomplish what you would like to do.

What you ask is generally considered impossible, but also usually not an issue. On the plus side, it is also a process generally understood by most users. Users do not expect to log in to a site with one browser, and then boot up another and still be logged in.

session expiry between browser and after browser or system shutdown ?

Neither after browser close nor system shutdown

Session is expired when its get timeout on server side, and it depends on each web server settings, for example, after 20 mintues.

Cookies are the only way to track users. They can either be persistent or not. If a cookie is persistent it is stored in the user's computer as a file and has an expiration date but only the browser that created it will be able to access it again. There's no way to achieve cross-browser cookies.

Then you should use. Client side cookies rather than session variables.

Session exists only until the browser close or system shutdown.

If you still want to proceed with session variable, then store the session value in the DB and whenever the login page loads check the db if the user hasn't signed out manually, if yes then show him main page otherwise show hime the login page.