DOM XML won't resolve local entities?

[nihils]

DOM XML won't resolve locally parsed entities that are declared in my DTD. Do I need a parser that validates, or is my DOM module broken? ;P

I've included my test setup below. test.php will output only "Foobar:". The GNOME project's xmllint says my documents are valid (using --valid). What am I missing?

Thanks!

Nick

test.dtd:

<!ELEMENT TEST ( #PCDATA )>
<!ENTITY FOOBAR "A foobar goes here.">

test.xml:

<?xml version="1.0"?>
<!DOCTYPE TEST SYSTEM "test.dtd">
<TEST>Foobar: &FOOBAR;</TEST>

test.php:

if ( !($doc = xmldocfile('test.xml'))) {
echo "Couldn't parse document.";

exit;
}

$root = $doc->root();
echo $root->content;