code:

function generate_xml_from_array($array, $node_name) 
{
	$xml = '';

	if (is_array($array) || is_object($array)) {
		foreach ($array as $key=>$value) {
			if (is_numeric($key)) {
				$key = $node_name;
			}

			$xml .= '<' . $key . '>' . "\n" . generate_xml_from_array($value, $node_name) . '</' . $key . '>' . "\n";
		}
	} else {
		$xml = htmlspecialchars($array, ENT_QUOTES) . "\n";
	}

	return $xml;
}