function DetectOperaMobile()
   {
      if ((stripos($this->useragent, $this->engineOpera) > -1) &&
      ((stripos($this->useragent, $this->mini) > -1) ||
          (stripos($this->useragent, $this->mobi) > -1)))
            return $this->true; 

      return $this->false; 
   }