php's simplexml_load_file() not loading all keys

Question

I'm using simplexml_load_file() to fetch my Twitter RSS feed and process it:

$feed = 'http://twitter.com/statuses/user_timeline/user.rss';
$tweets = simplexml_load_file($feed)

The data itself looks like this:

<item>
    <title>Title</title>
    <description>This is a description</description>
    <pubDate>Sun, 15 Aug 2010 18:21:20 +0000</pubDate>
    <guid>http://twitter.com/XXX&lt;/guid&gt;
    <link>http://twitter.com/XXX&lt;/link&gt;
    <twitter:source>Tweetie for Mac</twitter:source>
    <twitter:place/>
</item>

Everything works as expected, except <twitter:source> and <twitter:place> are never loaded into the $tweets array.

How can I modify this code so that all the fields are processed?

Thanks!

Answer 1

$feed = 'http://twitter.com/statuses/user_timeline/user.rss';
$tweets = simplexml_load_file($feed);

foreach($tweets->channel->item as $i => $v)
{
    echo $v->title . "<br />";
}

$tweets is not an array