session_is_registeredPHP ManualPrevNextsession_is_registeredsession_is_registered -- Find out if a variable is registered in a session Descriptionbool session_is_registered(string name); session_is_registered() returns true if there is a variable with the name name registered in the current session. Note: This function was added in PHP 4.0. PrevHomeNextsession_unregisterUpsession_decode