if(isset($_FILES["excelFile"])) {
         $filename = $_FILES["excelFile"]["tmp_name"];
 
         /**  Identify the type of $inputFileName  **/
         $inputFileType = PHPExcel_IOFactory::identify($filename);
         /**  Create a new Reader of the type that has been identified  **/
         $objReader = PHPExcel_IOFactory::createReader($inputFileType);
         /**  Load $inputFileName to a PHPExcel Object  **/
         $objPHPExcel = $objReader->load($filename);
 
         $worksheet = $objPHPExcel->getActiveSheet();
         $rows = $worksheet->getHighestRow();
 
         // rows start at row 1, which contain our titles, data starts at row 2
         $importData = array();
         $articleGroups = array();
         $articleGroupProducts = array();
         for($row = 2; $row < $rows; $row++) {
            $rowData = new \stdClass();
            $rowData->articleNumber = $worksheet->getCellByColumnAndRow(0, $row)->getValue();
            $rowData->articleName = $worksheet->getCellByColumnAndRow(1, $row)->getValue();
            $rowData->articleGroup = $worksheet->getCellByColumnAndRow(2, $row)->getValue();
 
            if(!in_array($rowData->articleGroup, $articleGroups)) {
               $articleGroups[] = '' . $rowData->articleGroup;
               $articleGroupProducts[$rowData->articleGroup] = array();
            }
            $articleGroupProducts[$rowData->articleGroup][] = (object)array(
               'articleName' => $rowData->articleName,
               'articleNumber' => $rowData->articleNumber);
            $importData[] = $rowData;
         }
         $this->importArticleGroups($articleGroups, $articleGroupProducts);
      }
 
      $this->set('imported', true);
   }