$dom = new domDocument("1.0","ISO-8859-1");
$dom->formatOutput = 1;
$root = $dom->createElement('forum');
//$root->setAttribute('uri', 'http://fudforum.org/index.php');
$branch = $dom->createElement('item');
$branch->setAttribute('id', '1');
$leaf = $dom->createElement('title');
$leaf->appendChild($dom->createTextNode('First Post!!!'));
$branch->appendChild($leaf);
$leaf = $dom->createElement('link');
$leaf->appendChild($dom->createTextNode('http://fudforum.org/index.php/m/1'));
$branch->appendChild($leaf);
$leaf = $dom->createElement('description');
$leaf->appendChild($dom->createTextNode('1st message in the forum.'));
$branch->appendChild($leaf);
$root->appendChild($branch);
$dom->appendChild($root);
echo $dom->saveXML();