/**
  * 
  * update dynamic-captions css file content
  */
 public static function updateDynamicCaptions($full = false)
 {
     if ($full) {
         $captions = array();
         $captions = RevOperations::getCaptionsContentArray();
         $styles = UniteCssParserRev::parseArrayToCss($captions, "\n");
         $styles = UniteCssParserRev::compress_css($styles);
         //write styles into dynamic css
         $stylesinnerlayers = str_replace('.tp-caption', '', $styles);
         $styles = $styles . "\n\n" . $stylesinnerlayers;
         UniteFunctionsRev::writeFile($styles, GlobalsRevSlider::$filepath_dynamic_captions);
     } else {
         //go through all sliders and check which classes are used, get all classes from DB and write them into the file
         $slider = new RevSlider();
         $arrSliders = $slider->getArrSliders();
         $classes = array();
         //get used classes
         if (!empty($arrSliders)) {
             foreach ($arrSliders as $slider) {
                 try {
                     //update from slides
                     $slides = $slider->getSlides();
                     $arrStaticSlides = $slider->getArrStaticSlides();
                     $slides = array_merge($slides, $arrStaticSlides);
                     if (!empty($slides)) {
                         foreach ($slides as $slide) {
                             $layers = $slide->getLayers();
                             if (!empty($layers)) {
                                 foreach ($layers as $layer) {
                                     if (isset($layer['style'])) {
                                         if (!empty($layer['style'])) {
                                             $classes[$layer['style']] = true;
                                         }
                                     }
                                 }
                             }
                         }
                     }
                 } catch (Exception $e) {
                     $errorMessage = "ERROR: " . $e->getMessage();
                 }
             }
         }
         if (!empty($classes)) {
             $captions = array();
             foreach ($classes as $class => $val) {
                 $captionCheck = RevOperations::getCaptionsContentArray($class);
                 if (!empty($captionCheck)) {
                     $captions[] = $captionCheck;
                 }
             }
             $styles = UniteCssParserRev::parseArrayToCss($captions, "\n");
             $styles = UniteCssParserRev::compress_css($styles);
             $stylesinnerlayers = str_replace('.tp-caption', '', $styles);
             $styles = $styles . "\n\n" . $stylesinnerlayers;
             //write styles into dynamic css
             UniteFunctionsRev::writeFile($styles, GlobalsRevSlider::$filepath_dynamic_captions);
         }
     }
 }