(PHP 5, PHP 7, PHP 8)
DOMElement::hasAttributeNS — Checks to see if attribute exists
$namespace, string $localName): bool
Indicates whether attribute in namespace namespace
named localName exists as a member of the element.
namespaceThe namespace URI.
localNameThe local name.
成功時(shí)返回 true， 或者在失敗時(shí)返回 false。