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session_is_registered
(PHP 4, PHP 5)
session_is_registered — Find out whether a global variable is registered in a session
Описание
bool session_is_registered ( string $name )
Finds out whether a global variable is registered in a session.
Список параметров
- name
-
The variable name.
Возвращаемые значения
session_is_registered() returns TRUE if there is a global variable with the name name registered in the current session, FALSE otherwise.
Примечания
Замечание: 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.
Предостережение
If you are using $_SESSION (or $HTTP_SESSION_VARS), do not use session_register(), session_is_registered() and session_unregister().