SimplePie_Locator::extension PHP Method

    public function extension(&$array)
    {
        foreach ($array as $key => $value) {
            if ($this->checked_feeds === $this->max_checked_feeds) {
                break;
            }
            if (in_array(strtolower(strrchr($value, '.')), array('.rss', '.rdf', '.atom', '.xml'))) {
                $this->checked_feeds++;
                $headers = array('Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1');
                $feed = $this->registry->create('File', array($value, $this->timeout, 5, $headers, $this->useragent));
                if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed)) {
                    return array($feed);
                } else {
                    unset($array[$key]);
                }
            }
        }
        return null;
    }