Yes! Otherwise I would get an error message. You can see the result of the code here:
http://43software.com/nwu-sd/html2pdf.php

and here is the code:
<?PHP

$phrase = 'the quick brown fox jumps over the lazy dog<br />'.
'(with span & style) the quick brown <span style="font-weight:bold; font-style:italic;">fox jumps</span> over the lazy dog';
// ---------------------------------------------------------------

require_once('../html2pdf/html2pdf.class.php');
$html2pdf = new HTML2PDF('P', 'A4', 'en');
$html2pdf->writeHTML($phrase);
$html2pdf->Output('first_PDF_file.pdf', 'I');

echo $phrase;
?>

Takh (./4) :
Hello,

I checked and it's work for me. Do you close every HTML tag ?