<?php 
require __DIR__ . '/vendor/autoload.php';

$html2pdf = new Html2Pdf();
ob_start();
// include(__DIR__ . '/content.php');
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>Hello</h1>
</body>
</html>
<?php
$html_code = ob_get_clean();
$html2pdf->writeHTML($html_code);
$html2pdf->output();
?>