I'm trying to iterate through a Twitter XML File, where the container tag is , and each user is . I need to create a variable $id based on the XML attribute for each user.

Username is already instantiated.

$url = "http://api.twitter.com/1/statuses/friends/$username.xml";
$xmlpure = file_get_contents($url);
$listxml = simplexml_load_string($xmlpure);

foreach($listxml->users->children() as $child)
  {
 $id  = $child->{"id"};
//Do another action
}

But I'm getting this error:

 Warning: main() [function.main]: Node no longer exists in /home/.../bonus.php on line 32

Line 32 is the foreach statement, and I don't actually USE the main() method.

What am I doing wrong?