Create and Send Xml in php

To create and send xml in php, the php code looks like this:

<?php

        // Start XML file, create parent node
        $doc = new DOMDocument();
        $doc->formatOutput = true;
        $node = $doc->createElement("rootnode");
        $parnode = $doc->appendChild($node);

        

        $node = $doc->createElement("childnode");

        $newnode = $parnode->appendChild($node);

        $newnode->setAttribute("description", "Some Description Text");

        $xmlfile = $doc->saveXML();

        header("Content-type: text/xml");

        echo $xmlfile;

?>