php's simplexml_load_file() not loading all keys
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</guid>
        <link>http://twitter.com/XXX</link>
        <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!
php's simplexml_load_file() not loading all keys
===

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</guid>
        <link>http://twitter.com/XXX</link>
        <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!