Retrieve data from RSS

$xml = file_get_contents("http://codjng.blogspot.com/source-code.rss");
$doc = new DOMDocument();
$doc->loadXML($xml);
$items = $doc->getElementsByTagName('item');
$numberItems = $items->length; (//wrong: count($items);)

for ($i = 0; $i < $numberItems; $i++) {
    $strItem = $items->item($i)->nodeValue;
    // data processing...
}