FastFeed\Parser\AbstractDomParser::getNodeValuesByTagName PHP Method

    protected function getNodeValuesByTagName(DOMElement $node, $tagName)
    {
        $values = array();
        $results = $node->getElementsByTagName($tagName);
        if ($results->length) {
            foreach ($results as $result) {
                if ($result->nodeValue) {
                    $values[] = $result->nodeValue;
                }
            }
        }
        return $values;
    }