Instructions on using DomDocument class on PHP 5

gistfile1.php

<?php

// Setting the document header
header('content-type: application/xml; charset=UTF-8');

// Instantiating a new DomDoc obj.
$xml = new DomDocument('1.0','UTF-8');
$xml->formatOutput = true;

// Creating a root element and assigning it to $xmlRoot variable
$xml->appendChild($xmlRoot = $xml->createElement('root')); 

// Populating the root element with an empty tag
$xmlRoot->appendChild($xml->createElement('emptyTag'));

// ... with a tag with attributes and a child
$xmlRoot->appendChild($xmlRootTagWithAtt = $xml->createElement('tagWithAtt'));
$xmlRootTagWithAtt->setAttribute('att', 'No need 4 escapes &éàä. See? :)');
$xmlRootTagWithAtt->appendChild($xml->createElement('anotherEmptyTag'));

// ... and with a tag containing a text node
$xmlRoot->appendChild($xml->createElement('tagWithText', 'Ni!'));

// Printing out.
echo $xml->saveXML();