The Dom\DocumentType class

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- The Dom\DocumentType class

# The Dom\DocumentType class

(PHP 8 >= 8.4.0)

## Introduction

Each Dom\Document has a `doctype` attribute whose value is either `null` or a Dom\DocumentType object.

This is the modern, spec-compliant equivalent of DOMImplementation.

## Class synopsis

class Dom\DocumentType extends Dom\Node implements Dom\ChildNode {
/* Inherited constants */
public const int Dom\Node::DOCUMENT_POSITION_DISCONNECTED = 0x1;
public const int Dom\Node::DOCUMENT_POSITION_PRECEDING = 0x2;
public const int Dom\Node::DOCUMENT_POSITION_FOLLOWING = 0x4;
public const int Dom\Node::DOCUMENT_POSITION_CONTAINS = 0x8;
public const int Dom\Node::DOCUMENT_POSITION_CONTAINED_BY = 0x10;
public const int Dom\Node::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;
/* Properties */
public readonly string $name;
public readonly Dom\DtdNamedNodeMap $entities;
public readonly Dom\DtdNamedNodeMap $notations;
public readonly string $publicId;
public readonly string $systemId;
public readonly ?string $internalSubset;
/* Inherited properties */
public readonly int $nodeType;
public readonly string $nodeName;
public readonly string $baseURI;
public readonly bool $isConnected;
public readonly ?Dom\Document $ownerDocument;
public readonly ?Dom\Node $parentNode;
public readonly ?Dom\Element $parentElement;
public readonly Dom\NodeList $childNodes;
public readonly ?Dom\Node $firstChild;
public readonly ?Dom\Node $lastChild;
public readonly ?Dom\Node $previousSibling;
public readonly ?Dom\Node $nextSibling;
public ?string $nodeValue;
public ?string $textContent;
/* Methods */
/* Not documented yet */
/* Inherited methods */
/* Not documented yet */
}

## Properties

publicId

  The public identifier of the external subset.

systemId

  The system identifier of the external subset. This may be an absolute URI or not.

name

  The name of DTD; i.e., the name immediately following the `DOCTYPE` keyword.

entities
  A Dom\DtdNamedNodeMap containing the general entities, both external and internal, declared in the DTD.
notations
  A Dom\DtdNamedNodeMap containing the notations declared in the DTD.
internalSubset

  The internal subset as a string, or `null` if there is none. This does not contain the delimiting square brackets.