/**
  * logs attempts
  * @param bool errorsOnly (only if error occured, otherwise always)
  * @returns null if not logged, true otherwise
  * 2009-12-18 ms
  */
 protected function _logAttempt($errorsOnly = true)
 {
     if ($errorsOnly === true && empty($this->error) && empty($this->internalError)) {
         return null;
     }
     if (!$this->settings[$this->Model->alias]['log']) {
         return null;
     }
     //App::import('Component', 'RequestHandler');
     $msg = 'IP \'' . CakeRequest::clientIP() . '\', Agent \'' . env('HTTP_USER_AGENT') . '\', Referer \'' . env('HTTP_REFERER') . '\', Host-Referer \'' . CommonComponent::getReferer() . '\'';
     if (!empty($this->error)) {
         $msg .= ', ' . $this->error;
     }
     if (!empty($this->internalError)) {
         $msg .= ' (' . $this->internalError . ')';
     }
     $this->log($msg, 'captcha');
     return true;
 }