What is the scope of the session variable $_SESSION['']? If I have a bunch of webpage surveys strung together, one after the other, will a session variable expire after a certain amount of time or will it exist as long as you don't close the browser? What happens if you hibernate your computer?
I seemed to have lost a session variable after hibernating and I'm not sure if that's the issue or if there is some other problem.
分享 The session as a whole (not just single variables) can be continued or lost for many reasons.
In the default configuration, the session is meant to be "lost" when the browser closes because the browser will remove the cookie identifying the session. It is still somewhere on the server until the session garbage collection deletes it. Because of that, a browser that is idle for a long time might still loose it's session because PHP will remove ones that haven't been used lately.
Check the configuration. In particular, you might want to adjust "session.gc_maxlifetime" and "session.cookie_lifetime" to your needs if you need to keep your sessions around longer.
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