//run following command
composer require dompdf/dompdf
// reference the Dompdf namespace
use DompdfDompdf;
// instantiate and use the dompdf class
$dompdf = new Dompdf();
//pass html code to following function
$dompdf->loadHtml(<html>html</html>);
// (Optional) Setup the paper size and orientation
$dompdf->setPaper('A4', 'landscape');
// Render the HTML as PDF
$dompdf->render();
// Output the generated PDF to Browser
$dompdf->stream();