forms.php

<?php
/**
 * Html2Pdf Library - example
 *
 * HTML => PDF converter
 * distributed under the OSL-3.0 License
 *
 * @package   Html2pdf
 * @author    Laurent MINGUET <webmaster@html2pdf.fr>
 * @copyright 2017 Laurent MINGUET
 */
require_once dirname(__FILE__).'/../vendor/autoload.php';

use Spipu\Html2Pdf\Html2Pdf;
use Spipu\Html2Pdf\Exception\Html2PdfException;
use Spipu\Html2Pdf\Exception\ExceptionFormatter;

// for display the post information
if (isset($_POST['test'])) {
    echo '<pre>';
    echo htmlentities(print_r($_POST, true));
    echo '</pre>';
    exit;
}

try {
    ob_start();
    require dirname(__FILE__).'/res/forms.php';
    $content = ob_get_clean();

    $html2pdf = new Html2Pdf('P', 'A4', 'fr');
    $html2pdf->pdf->SetDisplayMode('fullpage');
    $html2pdf->writeHTML($content);
    $html2pdf->output('forms.pdf');
} catch (Html2PdfException $e) {
    $html2pdf->clean();

    $formatter = new ExceptionFormatter($e);
    echo $formatter->getHtmlMessage();
}