FastFeed\Parser\AbstractDomParser::getNodeValueByTagName PHP Method

    protected function getNodeValueByTagName(DOMElement $node, $tagName)
    {
        $results = $node->getElementsByTagName($tagName);
        for ($i = 0; $i < $results->length; $i++) {
            $result = $results->item($i);
            if (!$result->nodeValue) {
                continue;
            }
            return $result->nodeValue;
        }
        return false;
    }