session_is_registeredsession_is_registered (PHP 4, PHP 5) session_is_registered --
Find out whether a global variable is registered in a session
Descriptionbool session_is_registered ( string name )
session_is_registered() returns TRUE if there
is a global variable with the name name
registered in the current session.
Note:
If $_SESSION (or
$HTTP_SESSION_VARS for PHP 4.0.6 or less) is
used, use isset() to check a variable is
registered in $_SESSION.
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