function file_to_obj_php_excel($inputFileName)
{
    $CI =& get_instance();
    PHPExcel_Shared_File::setUseUploadTempDirectory(true);
    if ($CI->config->item('spreadsheet_format') == 'XLSX') {
        $objReader = new PHPExcel_Reader_Excel2007();
    } else {
        $objReader = new PHPExcel_Reader_CSV();
        PHPExcel_Cell::setValueBinder(new TextValueBinder());
    }
    $objReader->setReadDataOnly(true);
    $objPHPExcel = $objReader->load($inputFileName);
    return $objPHPExcel;
}
 public function export()
 {
     if ($this->request->server['REQUEST_METHOD'] == 'POST') {
         ini_set('display_errors', 1);
         error_reporting(E_ERROR | E_PARSE);
         $this->load->model('module/product_option_image_pro');
         $data = $this->model_module_product_option_image_pro->getAllImages();
         require_once $this->PHPExcelPath();
         /*
         PHPExcel_CachedObjectStorageFactory::cache_in_memory;
         PHPExcel_CachedObjectStorageFactory::cache_in_memory_serialized;
         PHPExcel_CachedObjectStorageFactory::cache_in_memory_gzip;
         PHPExcel_CachedObjectStorageFactory::cache_to_discISAM;
         PHPExcel_CachedObjectStorageFactory::cache_to_phpTemp;
         PHPExcel_CachedObjectStorageFactory::cache_to_apc;
         PHPExcel_CachedObjectStorageFactory::cache_to_memcache
         PHPExcel_CachedObjectStorageFactory::cache_to_wincache;
         PHPExcel_CachedObjectStorageFactory::cache_to_sqlite;
         PHPExcel_CachedObjectStorageFactory::cache_to_sqlite3;
         */
         PHPExcel_Shared_File::setUseUploadTempDirectory(true);
         $cacheMethod = PHPExcel_CachedObjectStorageFactory::cache_to_discISAM;
         //PHPExcel_CachedObjectStorageFactory::cache_to_discISAM ; //
         $cacheSettings = array('memoryCacheSize' => '32MB');
         if (!PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings)) {
             $this->log->write("Product Options Images PRO: PHPExcel cache error");
         }
         $objPHPExcel = new PHPExcel();
         $objPHPExcel->setActiveSheetIndex(0);
         /*
         $column = 0;
         foreach ($data as $data_key => $data_val) {
         	$objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($column, 1, $data_key);
         	$column++;
         }
         */
         $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow(0, 1, 'product_id');
         $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow(1, 1, 'option_value_id');
         $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow(2, 1, 'image');
         $objPHPExcel->getActiveSheet()->fromArray($data, null, 'A2');
         unset($data);
         //$objPHPExcel->getActiveSheet()->fromArray($current_data, null, 'A2');
         //$objPHPExcel->getActiveSheet()->fromArray($data,null,'A2');
         $objWriter = new PHPExcel_Writer_Excel5($objPHPExcel);
         $file = DIR_CACHE . "/poip_export.xls";
         $objWriter->save($file);
         header('Content-Description: File Transfer');
         header('Content-Type: application/octet-stream');
         header('Content-Disposition: attachment; filename=' . basename($file));
         header('Content-Transfer-Encoding: binary');
         header('Expires: 0');
         header('Cache-Control: must-revalidate');
         header('Pragma: public');
         header('Content-Length: ' . filesize($file));
         // читаем файл и отправляем его пользователю
         readfile($file);
         exit;
     }
 }