How to add watermark to every page using mpdf in laravel - php

Question

I'm using niklasravnsborg/laravel-pdf package in laravel to generate a pdf. In this code i added watermark but that watermark is coming only on the last page though i wanted that to be in every page.
$pdf = PDFm::loadHtml($result->document);
$pdf->mpdf->SetWatermarkText('DRAFT');
$pdf->mpdf->showWatermarkText = true;
return $pdf->download('hdtuto.pdf');

Answer 1

From the documentation, it should work. Could you however, give the following a try?
$config = ['instanceConfigurator' => function($mpdf) {
$mpdf->SetWatermarkText('DRAFT');
$mpdf->showWatermarkText = true;
}]
PDF::loadHtml($result->document, $config)->download('hdtuto.pdf');
In this case, we are initialising the PDF instance with the right configuration instance, instead of doing it after loading the HTML.

Answer 2

mPDF doc states that
The watermark will be added to each page when the Footer is printed if the variable $showWatermark is set to 1 or true.
Try to add header/footer to your PDF and set corresponding flags

Answer 3

If any one trying to use blade file instead of direct html document, you can use view function which will return html content to the loadHtml method.
$config = ['instanceConfigurator' => function($mpdf) {
$mpdf->SetWatermarkText('DRAFT');
$mpdf->showWatermarkText = true;
}]
$pdf = PDF::loadHtml(view('path.to.blade_file', $blade_data), $config);
return $pdf->stream('DocumentName.pdf');
if you want to use an image as watermark
$config = ['instanceConfigurator' => function ($mpdf) {
$mpdf->SetWatermarkImage(asset('path/to/image_file'));
$mpdf->showWatermarkImage = true;
// $mpdf->watermarkImageAlpha = 0.2; // image opacity
// dd($mpdf) // show all attributes
}];
$pdf = PDF::loadHtml(view('path.to.blade_file', $blade_data), $config);
return $pdf->stream('DocumentName.pdf');