Add missing null types

A lot of property readee functions call php_dom_throw_error(INVALID_STATE_ERR, 0); but despite the function name, only a warning is emitted when the 2nd parameter is 0.

Author: kocsismate

ext/dom/php_dom.stub.php

@@ -4,15 +4,15 @@
 
 class DOMDocumentType extends DOMNode
 {
-    public string $name;
+    public ?string $name;
 
-    public DOMNamedNodeMap $entities;
+    public ?DOMNamedNodeMap $entities;
 
-    public DOMNamedNodeMap $notations;
+    public ?DOMNamedNodeMap $notations;
 
-    public string $publicId;
+    public ?string $publicId;
 
-    public string $systemId;
+    public ?string $systemId;
 
     public ?string $internalSubset;
 }
@@ -52,16 +52,16 @@ public function replaceWith(...$nodes): void;
 
 class DOMNode
 {
-    public string $nodeName;
+    public ?string $nodeName;
 
     /** @var string|null */
     public $nodeValue;
 
-    public int $nodeType;
+    public ?int $nodeType;
 
     public ?DOMNode $parentNode;
 
-    public DOMNodeList $childNodes;
+    public ?DOMNodeList $childNodes;
 
     public ?DOMNode $firstChild;
 
@@ -77,15 +77,15 @@ class DOMNode
 
     public ?string $namespaceURI;
 
-    /** @var string */
-    public $prefix = "";
+    /** @var string|null */
+    public $prefix;
 
     public ?string $localName;
 
     public ?string $baseURI;
 
-    /** @var string */
-    public $textContent = "";
+    /** @var string|null */
+    public $textContent;
 
     /** @return DOMNode|false */
     public function appendChild(DOMNode $node) {}
@@ -141,13 +141,14 @@ public function replaceChild(DOMNode $node, DOMNode $child) {}
 
 class DOMNameSpaceNode
 {
-    public string $nodeName;
+    public ?string $nodeName;
 
     public ?string $nodeValue;
 
-    public int $nodeType;
+    public ?int $nodeType;
 
-    public string $prefix;
+    /** @var string|null */
+    public $prefix;
 
     public ?string $localName;
 
@@ -179,7 +180,7 @@ class DOMDocumentFragment extends DOMNode implements DOMParentNode
 
     public ?DOMElement $lastElementChild;
 
-    public int $childElementCount;
+    public ?int $childElementCount;
 
     public function __construct() {}
 
@@ -208,9 +209,10 @@ public function item(int $index) {}
 
 class DOMCharacterData extends DOMNode implements DOMChildNode
 {
-    public string $data;
+    /** @var string|null */
+    public $data;
 
-    public int $length;
+    public ?int $length;
 
     public ?DOMElement $previousElementSibling;
 
@@ -245,11 +247,12 @@ public function after(...$nodes): void {}
 
 class DOMAttr extends DOMNode
 {
-    public string $name;
+    public ?string $name;
 
     public bool $specified = true;
 
-    public string $value;
+    /** @var string|null */
+    public $value;
 
     public ?DOMElement $ownerElement;
 
@@ -263,15 +266,15 @@ public function isId() {}
 
 class DOMElement extends DOMNode implements DOMParentNode, DOMChildNode
 {
-    public string $tagName;
+    public ?string $tagName;
 
     public mixed $schemaTypeInfo = null;
 
     public ?DOMElement $firstElementChild;
 
     public ?DOMElement $lastElementChild;
 
-    public int $childElementCount;
+    public ?int $childElementCount;
 
     public ?DOMElement $previousElementSibling;
 
@@ -367,11 +370,11 @@ class DOMDocument extends DOMNode implements DOMParentNode
 
     public ?string $xmlEncoding;
 
-    /** @var bool */
-    public $standalone = false;
+    /** @var bool|null */
+    public $standalone;
 
-    /** @var bool */
-    public $xmlStandalone = false;
+    /** @var bool|null */
+    public $xmlStandalone;
 
     /** @var string|null */
     public $version;
@@ -410,7 +413,7 @@ class DOMDocument extends DOMNode implements DOMParentNode
 
     public ?DOMElement $lastElementChild;
 
-    public int $childElementCount;
+    public ?int $childElementCount;
 
     public function __construct(string $version = "1.0", string $encoding = "") {}
 
@@ -526,7 +529,7 @@ final class DOMException extends Exception
 
 class DOMText extends DOMCharacterData
 {
-    public string $wholeText;
+    public ?string $wholeText;
 
     public function __construct(string $data = "") {}
 
@@ -584,17 +587,17 @@ public function __construct(string $name) {}
 
 class DOMNotation extends DOMNode
 {
-    public string $publicId;
+    public ?string $publicId;
 
-    public string $systemId;
+    public ?string $systemId;
 }
 
 class DOMProcessingInstruction extends DOMNode
 {
-    public string $target;
+    public ?string $target;
 
-    /** @var string */
-    public $data = "";
+    /** @var string|null */
+    public $data;
 
     public function __construct(string $name, string $value = "") {}
 }