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().