can't create many pdf files using dompdf - php

Question

I'm trying to create many pdf files using a loop and put them in a specific place, but I'm getting this error:
DOMPDF_Exception
File:
C:\wamp\www\leadmarket\vendor\dompdf\dompdf\include\inline_positioner.cls.php:37
Message:
No block-level parent found. Not good.
Here is my code:
for($i = 0 ; $i < 3 ; $i++){
$pdf = new PdfModel();
$pdf->setOption("paperSize", "a4"); //Defaults to 8x11
$pdfView = new ViewModel($pdf);
$pdfView->setTerminal(true)
->setTemplate('application/annonceur/generer-facture-mensuelle.phtml')
->setVariables(array(
'client' => $i
)
);
$html = $this->getServiceLocator()->get('viewpdfrenderer')->getHtmlRenderer()->render($pdfView);
$eng = $this->getServiceLocator()->get('viewpdfrenderer')->getEngine();
$eng->load_html($html);
$eng->render();
$pdfCode = $eng->output();
file_put_contents('public/folder/file-'.$i'.pdf', $pdfCode);
}

Answer 1

Dompdf currently only supports rendering a single document per instance (issue #1056). Until this issue is resolved you'll need to unset the Dompdf instance and create a new one.
It looks like you're creating an instance per loop of your PdfModel and ViewModel, but the Dompdf instance is part of the class that contains your loop ($this->getServiceLocator...).
I'm not familiar with the framework you're using, so I can't give you a specific answer. The quickest solution would be to not use the Dompdf instance that's part of your ServiceLocator instance.
Replace
$eng = $this->getServiceLocator()->get('viewpdfrenderer')->getEngine();
With
$eng = new Dompdf();
$eng->setOption("paperSize", "a4");
As you see the paper size had to be set again, and that's the drawback. Any options configured in the ServiceLocator will be lost.