将xml转换为数组

function xmlNameSpaceToArray(SimpleXmlIterator $xml, $nameSpaces=Null){
      $output = Null;
      $preparedArray = array();
      for($xml->rewind(); $xml->valid(); $xml->next()) {
        	$key = $xml->key();
        	if(!isset($preparedArray[$key])) { $preparedArray[$key] = array(); $i=0; }
        	else $i = count($preparedArray[$key]);
        	$simple = true;
        	foreach($xml->current()->attributes() as $k=>$v) {
            	$preparedArray[$key][$i][$k]=(string)$v;
            	$simple = false;
        	}
        	if($nameSpaces) foreach($nameSpaces as $nid=>$name) {
          	foreach($xml->current()->attributes($name) as $k=>$v) {
             	$preparedArray[$key][$i][$nid.':'.$k]=(string)$v;
             	$simple = false;
          	}
        	} 
        	if($xml->hasChildren()) {
            	if($simple) $preparedArray[$key][$i] = xmlNameSpaceToArray($xml->current(), $nameSpaces);
            	else $preparedArray[$key][$i]['content'] = xmlNameSpaceToArray($xml->current(), $nameSpaces);
        	} else {
            	if($simple) $preparedArray[$key][$i] = strval($xml->current());
            	else $preparedArray[$key][$i]['content'] = strval($xml->current());
        	}
        	$i++;
      }
      $output = $preparedArray;
      return $preparedArray;
}

function xmlToArray($xmlFilePath){
	$xml = new SimpleXmlIterator($xmlFilePath , null, true);
	$nameSpaces = $xml->getNamespaces(true);
	$output = xmlNameSpaceToArray($xml,$nameSpaces);
	return $output;
}

$xmlFilePath = 'http://forums.devshed.com/rss/feed-5.xml';
$output = xmlToArray($xmlFilePath);
print_r($output);