public function save()
 {
     global $wpdb;
     $table_name = SNS_DB_PREFIX . 'backups';
     $options = Sns_Option::get_options(true);
     $option_list = array();
     foreach ($options as $option => $data) {
         if ($option == Sns_Option::FULL) {
             $option_list = array($option);
             break;
         }
         if ($option != Sns_Option::COUNT) {
             $option_list[] = $option;
         }
     }
     $destination = new Sns_Destination($this->type);
     $destinations = $destination->get_destinations();
     $destination_list = array();
     foreach ($destinations as $name => $dst) {
         if ($dst->status == Sns_Destination::SET) {
             $destination_list[] = $name;
         }
     }
     $info = json_encode(array('options' => $option_list, 'destinations' => $destination_list));
     $data = array('type' => $this->type, 'info' => $info, 'backup_date' => date('Y-m-d H:i:s'), 'hash' => $this->hash, 'filename' => $this->filename);
     $r = $wpdb->insert($table_name, $data);
     if ($r === false) {
         throw new Sns_Exception_DB_Error('Error on inserting into ' . $table_name . ' data: ' . json_encode($data));
     }
 }