Problems with XHTML and PHP

I’m having trouble using XHTML with PHP. The XML Prolog creates an error.

This is what I'm using:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.1//EN”
“http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd”>

I found this solution below, but it adds “\n"; ?>” to the top of the page:

<?php echo "><?xml version=\"1.0\" encoding=\"iso-8859-1\"?>\n"; ?>

Do you know of any workaround?

Hi,

since <? is a php reserved tag you have to escape it or to split it like

<?php echo "><"."?xml version=\"1.0\" encoding=\"iso-8859-1\"?".">\n"; ?>

You can also turn off using short open tags in php.ini; 'course that means you'd have to use <?php all the time.