simplexml or str_replace? need some simple help

[iBuddy]

I am trying to use simplexml to pull a thumbnail from the google video rss feed.

google video rss link
http://video.google.com/videofeed?docid=-2020029531334253002

When I use this code

  $xml = simplexml_load_file('http://video.google.com/videofeed?docid=-2020029531334253002');
  var_dump($xml);

The string that I want to get is in bold:

<img src="http://video.google.com/ThumbnailServer2?app=vss&contentid=2059807e5d30b97a&offsetms=395000&itag=w320&lang=en&sigh=TY-gpiPz62_w-wiGSojeV-mG8j8" width="320" height="240" border="1" />

How would I go about doing this? Been trying a few hours with no success, would appreciate any help.

[cgraz]

$string = '<img src="http://video.google.com/ThumbnailSer...wiGSojeV-mG8j8" width="320" height="240" border="1" />';

$result = preg_split( '/(src=")(.*?)(\")/', $string, -1, PREG_SPLIT_DELIM_CAPTURE );

print 'URL: ' . $result[2];