<?php

header ("Content-Type:text/xml");
$doc = new DOMDocument('1.0','UTF-8');
$doc->formatOutput = true;

$course=$doc->appendChild($doc->createElement("course"));
$course->appendChild($doc->createElement("institute",$name));
$course->appendChild($doc->createElement("url",htmlentities($url)));
$course->appendChild($doc->createElement("red",$red));
$course->appendChild($doc->createElement("green",$green));
$course->appendChild($doc->createElement("blue",$blue));

echo $doc->saveXML();
?>