title: PHPExcel missing text boxes
body: <p>I need to open a existing xlsx file, that contains text boxes (those created with the predefined option like circles, squares, etc), and I need to write just behind this objects (they are transparent).</p>
  
  <p>The code bellow does everything fine, except that downloads the new file without the boxes.</p>
  
  <pre><code>if(file_exists("app/file.xlsx")){
  
          $objTpl = PHPExcel_IOFactory::load("app/file.xlsx");
          $objTpl-&gt;setActiveSheetIndex(1);
  
          $objTpl-&gt;getActiveSheet()-&gt;setCellValue('A1', 'x');
          $objTpl-&gt;getActiveSheet()-&gt;setCellValue('A2', 'y');
          $objTpl-&gt;getActiveSheet()-&gt;setCellValue('A3', 'z');
  
          $filename = 'new_file.xlsx';
          header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
          header('Content-Disposition: attachment;filename="'.$filename.'"');
          header('Cache-Control: max-age=0');
  
          $objWriter = PHPExcel_IOFactory::createWriter($objTpl, 'Excel2007');
          ob_end_clean();
          $ret = $objWriter-&gt;save('php://output');
  
          exit;
      }
  </code></pre>