22     protected static $COMPOSE_ID;  variable in rcmail_action_mail_compose
39         self::$COMPOSE_ID = rcube_utils::get_input_value('_id', rcube_utils::INPUT_GET);
42         if (self::$COMPOSE_ID && $_SESSION['compose_data_' . self::$COMPOSE_ID]) {
43             self::$COMPOSE =& $_SESSION['compose_data_' . self::$COMPOSE_ID];
48 …while (self::$COMPOSE_ID && !is_array(self::$COMPOSE) && $rcmail->db->is_replicated() && $retries+…
51             if ($_SESSION['compose_data_' . self::$COMPOSE_ID]) {
52                 self::$COMPOSE =& $_SESSION['compose_data_' . self::$COMPOSE_ID];
60             if (self::$COMPOSE_ID) {
65                     || self::$COMPOSE_ID != $_SESSION['last_compose_session']
71             self::$COMPOSE_ID = uniqid(mt_rand());
74             $_SESSION['compose_data_' . self::$COMPOSE_ID] = [
75                 'id'      => self::$COMPOSE_ID,
81             self::$COMPOSE =& $_SESSION['compose_data_' . self::$COMPOSE_ID];
410                     $attachment = $attach + ['group' => self::$COMPOSE_ID];
416                         'group'    => self::$COMPOSE_ID,