Fatal error: Call to undefined function getelementsbytagname()

<?php
$doc = new DOMDocument();
$doc->load(“news.xml”);

$items = $doc.getElementsByTagName(“item”);
?>

i am trying to use the code above to load the news.xml file and to save the item node into the item variable. However i keep getting the Fatal error: Call to undefined function getelementsbytagname() erorr.

Below is the xml file any ideas why this is happening?

<?xml version=”1.0″ encoding=”UTF-8″?>
<rss version=”2.0″ xmlns:atom=”http://www.w3.org/2005/Atom“>
<channel>
<item>
<title>blog post1</title>
<link>link to site</link>
<description> blogdescription</description>
</item>
<item>
<title>blog post2</title>
<link>link to site</link>
<description> blogdescription</description>
</item>
<item>
<title>blog post3</title>
<link>link to site</link>
<description> blogdescription</description>
</item>
<item>
<title>blog post4</title>
<link>link to site</link>
<description> blogdescription</description>
</item>
<title>The Unified Feed</title>
<link>http://www.unifiedsoftwaresolutions.com/news.xml</link>
<description>product updates and new</description>
<ttl>60</ttl>
<atom:link href=”http://www.unifiedsoftwaresolutions.com/news.xml” rel=”self” type=”application/rss+xml” />
</channel>
</rss>

any help would be appreciated ?.

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