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I'm storing some user information in session so I don't have to query the database every single time user changes page. What if this user uses multiple browsers/computers and olders sessions have invalid data now? How do I keep them in sync? Logging out the older sessions of the user is fine, but I would like to avoid writing session info to db, if possible.

I do realize it's a fairly common problem, but I couldn't come up with right stuff after googling.

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Store the session in a database for each specific user.

Then each time the users access your site (regardless of which browser) - all the information is always in one location, and you dont have to do any fancy 'sync' stuff.

Note: they will still have to 'login' from each different browser. During the login process, you will need to check if a session already exists in the database for that user. If it does, you need to attach this new login to that session (rather than create a new one).

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Well - you cant store the session in the cookie on each browser - because you will have no way to 'sync' the data reliably. So it needs to be file/database storage - i.e. a centralised location on your server.
You could serialize session anx store it in a file. But I always precer databases to files. Its much more stable
any link for the process you're describing (about storing it in database)? I am a little stuck with searching for this as I mentioned.
Try this stackoverflow.com/questions/2950355/…

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