http://www.php.net/manual/en/session.configuration.php#ini.session.cookie-lifetime
says that a session.cookie_lifetime of 0 \"goes until the browser is closed\". Is
Wait there is the confusion .....
"Session" will not lost if the the browser get closed....its the "Cookies" which get lost on close of browser.
"Session" is altogether is different from "Cookies". Session stays at server and can be destroyed explicitly. Whereas "Cookies" resides at client end and can be destroyed manually or at a particular time interval or on browser close.