My s3 url is https://s3-us-west-2.amazonaws.com/bucket_name/test.png
its working fine on browser and showing image not found after including it on pdf file.
$pdf = new \DOMPDFModule\View\Model\PdfModel();
$pdf->setOption("filename", $filename);
$pdf->setOption("paperSize", "a4");
$pdf->setOption("paperOrientation", "landscape");
$dompdf = new \DOMPDF();
$dompdf->load_html($html);
$dompdf->render();
$pdfCode = $dompdf->output();
file_put_contents('path_to_pdf/test.pdf', $pdfCode);
If you use Laravel, you need to add this to your blade.
@php
use Illuminate\Support\Facades\Storage;
$content = Storage::get('vinylmaster.png');
$imageData = base64_encode($content);
$src = 'data:image/png;base64,' . $imageData;
@endphp
<img src="{{$src}}">
if you are not on Laravel, try Embedding images in a PDF file with PHP and DOMPDF