protected getRequiredDomElementByTagNameNS ( DOMNode $dom, string $namespace, string $element, string $errorMessage = '' ) : boolean | DOMNode | ||
$dom | DOMNode | The DOM element which content should be searched |
$namespace | string | The namespace of the searched element |
$element | string | The name of the searched element |
$errorMessage | string | The error message in case the element is not found |
return | boolean | DOMNode |