From SimpleXML processing with PHP A markup-specific library for XML processing in PHP by Elliotte Rusty Harold, IBM Developerworks, 2006
<html xml:lang="en" lang="en">
<head>
<title>XPath Example</title>
</head>
<body>
<?php
$rss = simplexml_load_file('http://partners.userland.com/nytRss/nytHomepage.xml');
foreach ($rss->xpath('//title') as $title) {
echo "<h2>" . $title . "</h2>";
}
?>
</body>
</html>