$table_id = 'animal';
	$query = "SELECT * FROM $table_id";
	$dbresult = mysql_query($query, $con);

	$doc = new DomDocument('1.0');

	$root = $doc->createElement('root');
	$root = $doc->appendChild($root);

	while($row = mysql_fetch_assoc($dbresult)) {

	$occ = $doc->createElement($table_id);
	$occ = $root->appendChild($occ);

		$subRoot = $doc->createElement($table_id);
		$subRoot = $root->appendChild($subRoot);

	foreach ($row as $fieldname => $fieldvalue) {

	$child = $doc->createElement($fieldname);
	$child = $occ->appendChild($child);

	$value = $doc->createTextNode($fieldvalue);
	$value = $child->appendChild($value);

	} // foreach
	} // while


	$xml_string = $doc->saveXML();
	$file_handle = fopen('file.xml','a');
	fwrite($file_handle,$xml_string);
	fclose($file_handle);
?>