sessn_cache_expire -- Return current cache expire session_cache_limiter -- Get and/or set the current cache limiter session_commit -- 别名 session_write_close() session_decode -- Decodes session data from a string session_destroy -- Destroys all data registered to a session session_encode -- 将当前会话数据编码为一个字符串 session_get_cookie_params -- Get the session cookie parameters session_id -- Get and/or set the current session id session_is_registered -- Find out whether a global variable is registered in a session session_module_name -- Get and/or set the current session module session_name -- Get and/or set the current session name session_regenerate_id -- Update the current session id with a newly generated one session_register -- Register one or more global variables with the current session session_save_path -- Get and/or set the current session save path session_set_cookie_params -- Set the session cookie parameters session_set_save_handler -- Sets user-level session storage functions session_start -- Initialize session data session_unregister -- Unregister a global variable from the current session session_unset -- Free all session variables session_write_close -- Write session data and end session 选至PHP手册