Get and/or set the current session id session_get_cookie_params session_is_registered Session Functions PHP Manual session_id (PHP 4, PHP 5)session_id — Get and/or set the current session id Description 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. Parameters id 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! Note: 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. Return Values 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). See Also session_regenerate_id() session_start() session_set_save_handler() session.save_handler session_get_cookie_params session_is_registered Session Functions PHP Manual
