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(PHP 4, PHP 5)

session_id - Get and/or set the current session id


string session_id ( [string id] )

session_id() is used to get or set the session id for the current session.

The constant SID can also be used to retrieve the current name and session id as a string suitable for adding to URLs. See also Session handling.

Список параметров


If id is specified, it will replace the current session id. session_id() needs to be called before session_start() for that purpose. Depending on the session handler, not all characters are allowed within the session id. For example, the file session handler only allows characters in the range a-z, A-Z and 0-9!

Замечание: When using session cookies, specifying an id for session_id() will always send a new cookie when session_start() is called, regardless if the current session id is identical to the one being set.

Возвращаемые значения

session_id() returns the session id for the current session or the empty string ("") if there is no current session (no current session id exists).

Смотрите также: session_regenerate_id(), session_start(), session_set_save_handler(), session.save_handler.

Все функции сессии
Описание на ru2.php.net
Описание на php.ru