Yii2 mpdf with barcode-generator - yii2

Question

I'm using yii2 and installed two extension : mpdf , and yii2-barcode-generator-8-types.
Both of them were installed and configured properly and working well.
But what I can't do is to load barcode into pdf.
Here is my code :
Controller :
public function actionPdf()
{
$pdf = Yii::$app->pdf;
$pdf->content = $this->renderPartial('_pdf');
echo $this->renderPartial('_pdf');exit;
return $pdf->render();
}
View :
<div id="showBarcode"></div>
<?php
use barcode\barcode\BarcodeGenerator as BarcodeGenerator;
$optionsArray = array(
'elementId'=> 'showBarcode',
'value'=> '12345678',
'type'=>'code128',
);
echo BarcodeGenerator::widget($optionsArray);
?>
And it show something like this
but If I try to delete all code inside actionPdf() and just write
return $this->render("_pdf");
it show like this:
Please help!!!

Answer 1

I think your controller should be this
public function actionPdf()
{
$pdf = Yii::$app->pdf;
$pdf->content = $this->renderPartial('_pdf');
return $pdf->render();
}
The row with echo $this->renderPartial('_pdf');exit; don't must be used because it prevents the program to invoke correctly the render of the pdf page. If you use this instruction you displays only the render of "html like code" page like you see in result you posted moreover immediately after this instruction you exit form action without invoking the $pdf->render.