(PHP 5 >= 5.1.0)
XMLReader::getAttributeNs — Get the value of an attribute by localname and URI
$localName
   , string $namespaceURI
   )Returns the value of an attribute by name and namespace URI or an empty string if attribute does not exist or not positioned on an element node.
localNameThe local name.
namespaceURIThe namespace URI.
   The value of the attribute, or an empty string (before PHP 5.6) or NULL
   (from PHP 5.6 onwards) if no attribute with the given
   localName and namespaceURI is
   found or not positioned of element.
  
| Version | Description | 
|---|---|
| 5.6.0 | XMLReader::getAttributeNS() now returns NULLif the attribute doesn't exist. |