Make getElementsByTagNameNS $namespace nullable

According to the DOM specification, this argument is supposed to
be nullable.

1 files changed, 2 insertions, 2 deletions

diff --git a/ext/dom/php_dom.stub.php b/ext/dom/php_dom.stub.php
index cdc6b99846..b303caf93f 100644
--- a/ext/dom/php_dom.stub.php
+++ b/ext/dom/php_dom.stub.php
@@ -190,7 +190,7 @@ class DOMElement implements DOMParentNode, DOMChildNode
     public function getElementsByTagName(string $qualifiedName) {}
 
     /** @return DOMNodeList */
-    public function getElementsByTagNameNS(string $namespace, string $localName) {}
+    public function getElementsByTagNameNS(?string $namespace, string $localName) {}
 
     /** @return bool */
     public function hasAttribute(string $qualifiedName) {}
@@ -287,7 +287,7 @@ class DOMDocument implements DOMParentNode
     public function getElementsByTagName(string $qualifiedName) {}
 
     /** @return DOMNodeList */
-    public function getElementsByTagNameNS(string $namespace, string $localName) {}
+    public function getElementsByTagNameNS(?string $namespace, string $localName) {}
 
     /** @return DOMNode|false */
     public function importNode(DOMNode $node, bool $deep = false) {}