note 24457 modified in function.unset by jmcastagnetto

[Editor's note: this note is partially correct, you can destroy session a variable using session_unregister(), and then you can safely unset() it.] If you unset session variables with unset($_SESSION['foo']) the variables will only be unset from the $_SESSION array inside the calling script. Calling isset($_SESSION['foo']) on the next page will return true! It seems that it is impossible to delete only certain session variables permanently. You can, however, delete all variables with session_unset(). --was-- If you unset session variables with unset($_SESSION['foo']) the variables will only be unset from the $_SESSION array inside the calling script. Calling isset($_SESSION['foo']) on the next page will return true! It seems that it is impossible to delete only certain session variables permanently. You can, however, delete all variables with session_unset(). http://www.php.net/manual/en/function.unset.php