Add custom text around a barcode with Zend_Pdf (Zend Framework 1.12) - zend-framework

Question

I want to add a custom text around a barcode inside a PDF-document using Zend_Pdf and Zend_Barcode. Right now it is only showing the barcode but I want to add my custom text too above it.
So now I am getting this:
but I want this:
Here is my code:
$pdf = new Zend_Pdf();
$hidden =$_POST['hidden'];
$quantityfrom =$_POST['quantity_from'];
$quantityto =$_POST['quantity_to'];
//Here is code for update the Quantity
$product_id = $_POST['product_id'];
$table = new Account_Model_DbTable_Products();
$query = $table->updateQuantity($product_id,$quantityto);
Zend_Barcode::setBarcodeFont(dirname(ROOT_PATH) . '/inventory/library/Zend/Barcode/Object/fonts/open-sans/OpenSans-Semibold.ttf');
$numberOfPages = ceil(($quantityto-$quantityfrom)/15);
$equipmentCount = $quantityto-$quantityfrom+1;
for($i = 1; $i <= $numberOfPages; $i++)
{
$page = new Zend_Pdf_Page(Zend_Pdf_Page::SIZE_A4);
$width = $page->getWidth(); // A4 : 595
$height = $page->getHeight(); // A4 : 842
$page->setFont(Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA), 20);
$pdf->pages[] = $page;
}
$index = 0;
for($j=1 ; $j<=$numberOfPages;$j++){
if($equipmentCount > 10)
{
$barcodesOnThisPage = 10;
$equipmentCount = $equipmentCount - 10;
}
else
{
$barcodesOnThisPage = $equipmentCount;
}
echo $barcodesOnThisPage."</br>";
$k = 1;
for($i=1;$i<=$barcodesOnThisPage;$i++){
$num_padded = sprintf("%04d", $quantityfrom);
$barcodeOptions = array(
'text' => $hidden.$num_padded,
'barHeight' =>100,
);
$rendererOptions = array(
'topOffset' => 80*$k,
'horizontalPosition' =>'left'
);
$pdfWithBarcode = Zend_Barcode::factory('code39', 'pdf',
$barcodeOptions, $rendererOptions)->setResource($pdf,$index)->draw();
$pdfWithBarcode->save('testBarcode.pdf');
$k++;
$quantityfrom++;
}
$index++;
}
$this->_redirect('/testBarcode.pdf');
}