/**
* Check is there child element nodes for node.
*
* @static
* @access private
*
* @param DOMElement $node Node to check.
* @return bool is $node contains child element nodes.
*/
private static function has_child($node)
{
if ($node->has_childNodes()) {
foreach ($node->childNodes as $c) {
if ($c->nodeType == XML_ELEMENT_NODE) {
return true;
}
}
}
return false;
}