获取对象中的数据 - SimpleXML

Question

So I got a simple function that works, but I'm trying to evolve my experince wtih OOP and try to make sure I can use my code without having to edit everything.

Here is my simple function

$xmlfeed = file_get_contents('/forum/syndication.php?limit=3');

$xml = new SimpleXMLElement($xmlfeed);
$result = $xml->xpath('channel/item/title');

while(list( , $node) = each($result)) {
    echo $node;
}

Now so far I got to this point:

class ForumFeed {
    private function getXMLFeeds($feed = 'all'){
        /*
            Fetch the XML feeds
         */
        $globalFeedXML = file_get_contents('/forum/syndication.php?limit=3');
        $newsFeedXML = file_get_contents('/forum/syndication.php?fid=4&limit=3');

        /*
            Turn feed strings into actual objects
         */
        $globalFeed = new SimpleXMLElement($globalFeedXML);
        $newsFeed = new SimpleXMLElement($newsFeedXML);

            /*
                Return requested feed
             */
            if ($feed == 'news') {
                return $newsFeed;
            } else if ($feed == 'all') {
                return $globalFeed;
            } else {
                return false;
            }

    }
    public function formatFeeds($feed) {
        /*
            Format Feeds for displayable content..
            For now we're only interested in the titles of each feed
         */
        $getFeed = $this->getXMLFeeds($feed);

        return $getFeed->xpath('channel/item/title');
    }
}

$feeds = new ForumFeed();

However when trying to echo $feeds->formatFeeds('all'); it doesn't return anything. The results is blank.

What am I doing wrong?

var_dump($feeds->formatFeeds('all')); returns

array(3) {
  [0]=>
  object(SimpleXMLElement)#3 (0) {
  }
  [1]=>
  object(SimpleXMLElement)#4 (0) {
  }
  [2]=>
  object(SimpleXMLElement)#5 (0) {
  }
}

Answer 1

According to PHPs documentation SimpleXMLElement::xpath returns an array of SimpleXMLElements or false on error. Maybe var_dump($feeds->formatFeeds('all')); prints something you then can use to debug.

Edit: The XPath query returns results, so probably there is a logical error in your query or the returned elements don't have content.