使用Dompdf库生成的PDF填充tempfolder

Question

I am currently generating some pdfs with the dompdf library but every time a pdf is being generated my temp folder is being filled with this file and the images associated with it. I am trying to unlink or delete the pdf and any temp files generated with it but the following code is not giving the desired result. Does anyone know what else I can do in this situation? I am using PHP and have installed the library with composer.

pdf code:

    // reference the Dompdf namespace
use Dompdf\Dompdf;

// instantiate and use the dompdf class
$dompdf = new Dompdf();
//$dompdf->loadHtml('hello world');
$dompdf->set_option('isHtml5ParserEnabled', true);
$dompdf->set_option('isRemoteEnabled', true);
$dompdf -> loadHtml($html);

// (Optional) Setup the paper size and orientation
$dompdf->setPaper('A4', 'portrait');

// Render the HTML as PDF
$dompdf->render();

// Output the generated PDF to Browser
$dompdf->stream();
unlink($dompdf);