/**
  * 
  * export slider
  */
 public function exportSlider($sliderID)
 {
     $slider = $this->getSliderRawData($sliderID);
     $slides = $this->getSlidesRawData($sliderID);
     $params = $slider["params"];
     //modify slides:
     foreach ($slides as $key => $slide) {
         unset($slide["id"]);
         unset($slide["sliderid"]);
         $slides[$key] = $slide;
     }
     $arrExport = array("params" => $params, "slides" => $slides);
     $strExport = serialize($arrExport);
     $title = $slider["title"];
     if (empty($title)) {
         $title = "slider" . $slider["id"];
     }
     UniteFunctionsRev::downloadFileFromString($strExport, $title . ".txt");
 }