/**
* Get specific XML tag or attribute value.
*
* @param string $tag
* Tag name (examples: guid, media:content)
* @param string $attribute
* Tag attribute
*
* @return array|false Tag values or error
*/
public function getTag($tag, $attribute = '')
{
// convert to xPath attribute query
if ($attribute !== '') {
$attribute = '/@' . $attribute;
}
// construct query
$query = './/' . $tag . $attribute;
$elements = XmlParser::getXPathResult($this->xml, $query, $this->namespaces);
if ($elements === false) {
// xPath error
return false;
}
return array_map(function ($element) {
return (string) $element;
}, $elements);
}