Add stuff

stubs/dom.stub

@@ -29,8 +29,11 @@ class DOMDocument extends DOMNode
 
 class DOMNode
 {
-	/** @var DOMNamedNodeMap<DOMAttr>|null */
-	public readonly ?DOMNamedNodeMap $attributes;
+	/**
+	 * @readonly
+	 * @var DOMNamedNodeMap<DOMAttr>|null
+	 */
+	public $attributes;
 }
 
 class DOMElement extends DOMNode
@@ -150,6 +153,24 @@ class DOMProcessingInstruction extends DOMNode
 class DOMNamedNodeMap implements Traversable, IteratorAggregate, Countable
 {
 
+    /**
+     * @return (TNode | null)
+     */
+    public function getNamedItem(string $qualifiedName)
+    {
+    }
+    /**
+     * @return (TNode | null)
+     */
+    public function getNamedItemNS(?string $namespace, string $localName)
+    {
+    }
+    /**
+     * @return (TNode | null)
+     */
+    public function item(int $index)
+    {
+    }
 }
 
 class DOMText extends DOMCharacterData

tests/PHPStan/Analyser/nsrt/DOMLegacyNamedNodeNap.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace DOMLegacyNamedNodeMap;
+
+use DOMAttr;
+use DOMNode;
+use DOMNamedNodeMap;
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+	public function checkAttributes(DOMNode $node): void {
+		assertType('DOMNamedNodeMap<DOMAttr>', $node->attributes);
+		if ($node->hasAttribute('attr')) {
+			assertType('DOMAttr', $node->attributes->getNamedItem('attr'));
+		} else {
+			assertType('null', $node->attributes->getNamedItem('attr'));
+		}
+	}
+}

tests/PHPStan/Rules/Properties/data/dom-legacy-ext-template-nodes.php

@@ -2,11 +2,11 @@
 
 use function PHPStan\Testing\assertType;
 
-function (\DOMNode $node): void {
+function basic_node(\DOMNode $node): void {
 	assertType(DOMNamedNodeMap::class . '<' . DOMAttr::class . '>', $node->attributes);
 };
 
-function parse(\DOMElement $node): void
+function element_node(\DOMElement $node): void
 {
 	assertType(DOMNamedNodeMap::class . '<' . DOMAttr::class . '>', $node->attributes);
 	$attribute = $node->attributes->getNamedItem('class');