Question

Is it possible to have htmlpurifier use the html5 doctype?

The documentation here states that you can change the doctype and encoding with the following:

<?php
    require_once '/path/to/htmlpurifier/library/HTMLPurifier.auto.php';

    $config = HTMLPurifier_Config::createDefault();
    $config->set('Core', 'Encoding', 'ISO-8859-1'); // replace with your encoding
    $config->set('HTML', 'Doctype', 'HTML 4.01 Transitional'); // replace with your doctype
    $purifier = new HTMLPurifier($config);

    $clean_html = $purifier->purify($dirty_html);
?>

but then in the install instructions here states that the supported doctypes are:

256 Other supported doctypes include:
257
258     * HTML 4.01 Strict
259     * HTML 4.01 Transitional
260     * XHTML 1.0 Strict
261     * XHTML 1.0 Transitional
262     * XHTML 1.1

Is it possible to do the following to allow html5 doctype?

<?php
        require_once '/path/to/htmlpurifier/library/HTMLPurifier.auto.php';

        $config = HTMLPurifier_Config::createDefault();
        $config->set('Core', 'Encoding', 'UTF-8'); // replace with your encoding
        $config->set('HTML', 'Doctype', 'html5'); // replace with your doctype
        $purifier = new HTMLPurifier($config);

        $clean_html = $purifier->purify($dirty_html);
    ?>

Or is there another way?

Answer 1

No, HTML Purifier does not currently support HTML 5.