PHP Manual
DOM
The DOMDocument class

The DOMDocument class

(PHP 5, PHP 7, PHP 8)

Introduction

Represents an entire HTML or XML document; serves as the root of the document tree.

Class synopsis

class DOMDocument extends DOMNode implements DOMParentNode {

/* Properties */

public readonly ?DOMDocumentType $doctype;

public readonly DOMImplementation $implementation;

public readonly ?DOMElement $documentElement;

public readonly ?string $actualEncoding;

public ?string $encoding;

public readonly ?string $xmlEncoding;

public bool $standalone;

public bool $xmlStandalone;

public ?string $version;

public ?string $xmlVersion;

public bool $strictErrorChecking;

public ?string $documentURI;

public readonly mixed $config = null;

public bool $formatOutput;

public bool $validateOnParse;

public bool $resolveExternals;

public bool $preserveWhiteSpace;

public bool $recover;

public bool $substituteEntities;

public readonly ?DOMElement $firstElementChild;

public readonly ?DOMElement $lastElementChild;

public readonly int $childElementCount;

/* Inherited properties */

public readonly string $nodeName;

public ?string $nodeValue;

public readonly int $nodeType;

public readonly ?DOMNode $parentNode;

public readonly DOMNodeList $childNodes;

public readonly ?DOMNode $firstChild;

public readonly ?DOMNode $lastChild;

public readonly ?DOMNode $previousSibling;

public readonly ?DOMNode $nextSibling;

public readonly ?DOMNamedNodeMap $attributes;

public readonly ?DOMDocument $ownerDocument;

public readonly ?string $namespaceURI;

public string $prefix;

public readonly ?string $localName;

public readonly ?string $baseURI;

public string $textContent;

/* Methods */

public __construct(string $version = "1.0", string $encoding = "")

public createAttribute(string $localName): DOMAttr|false

public createAttributeNS(?string $namespace, string $qualifiedName): DOMAttr|false

public createCDATASection(string $data): DOMCdataSection|false

public createComment(string $data): DOMComment

public createDocumentFragment(): DOMDocumentFragment

public createElement(string $localName, string $value = ""): DOMElement|false

public createElementNS(?string $namespace, string $qualifiedName, string $value = ""): DOMElement|false

public createEntityReference(string $name): DOMEntityReference|false

public createProcessingInstruction(string $target, string $data = ""): DOMProcessingInstruction|false

public createTextNode(string $data): DOMText

public getElementById(string $elementId): ?DOMElement

public getElementsByTagName(string $qualifiedName): DOMNodeList

public getElementsByTagNameNS(?string $namespace, string $localName): DOMNodeList

public importNode(DOMNode $node, bool $deep = false): DOMNode|false

public load(string $filename, int $options = 0): DOMDocument|bool

public loadHTML(string $source, int $options = 0): DOMDocument|bool

public loadHTMLFile(string $filename, int $options = 0): DOMDocument|bool

public loadXML(string $source, int $options = 0): DOMDocument|bool

public normalizeDocument(): void

public registerNodeClass(string $baseClass, ?string $extendedClass): bool

public relaxNGValidate(string $filename): bool

public relaxNGValidateSource(string $source): bool

public save(string $filename, int $options = 0): int|false

public saveHTML(?DOMNode $node = null): string|false

public saveHTMLFile(string $filename): int|false

public saveXML(?DOMNode $node = null, int $options = 0): string|false

public schemaValidate(string $filename, int $flags = 0): bool

public schemaValidateSource(string $source, int $flags = 0): bool

public validate(): bool

public xinclude(int $options = 0): int|false

/* Inherited methods */

public DOMNode::appendChild(DOMNode $node): DOMNode|false

public DOMNode::C14N(
    bool $exclusive = false,
    bool $withComments = false,
    ?array $xpath = null,
    ?array $nsPrefixes = null
): string|false

public DOMNode::C14NFile(
    string $uri,
    bool $exclusive = false,
    bool $withComments = false,
    ?array $xpath = null,
    ?array $nsPrefixes = null
): int|false

public DOMNode::cloneNode(bool $deep = false): DOMNode|false

public DOMNode::getLineNo(): int

public DOMNode::getNodePath(): ?string

public DOMNode::hasAttributes(): bool

public DOMNode::hasChildNodes(): bool

public DOMNode::insertBefore(DOMNode $node, ?DOMNode $child = null): DOMNode|false

public DOMNode::isDefaultNamespace(string $namespace): bool

public DOMNode::isSameNode(DOMNode $otherNode): bool

public DOMNode::isSupported(string $feature, string $version): bool

public DOMNode::lookupNamespaceUri(string $prefix): string

public DOMNode::lookupPrefix(string $namespace): ?string

public DOMNode::normalize(): void

public DOMNode::removeChild(DOMNode $child): DOMNode|false

public DOMNode::replaceChild(DOMNode $node, DOMNode $child): DOMNode|false

}

Properties

actualEncoding: Deprecated. Actual encoding of the document, is a readonly equivalent to encoding.
childElementCount: The number of child elements.
config: Deprecated. Configuration used when DOMDocument::normalizeDocument() is invoked.
doctype: The Document Type Declaration associated with this document.
documentElement: The DOMElement object that is the first document element. If not found, this evaluates to null.
documentURI: The location of the document or null if undefined.
encoding: Encoding of the document, as specified by the XML declaration. This attribute is not present in the final DOM Level 3 specification, but is the only way of manipulating XML document encoding in this implementation.
firstElementChild: First child element or null.
formatOutput: Nicely formats output with indentation and extra space. This has no effect if the document was loaded with preserveWhitespace enabled.
implementation: The DOMImplementation object that handles this document.
lastElementChild: Last child element or null.
preserveWhiteSpace: Do not remove redundant white space. Default to true. Setting this to false has the same effect as passing LIBXML_NOBLANKS as option to DOMDocument::load() etc.
recover: Proprietary. Enables recovery mode, i.e. trying to parse non-well formed documents. This attribute is not part of the DOM specification and is specific to libxml.
resolveExternals: Set it to true to load external entities from a doctype declaration. This is useful for including character entities in your XML document.
standalone: Deprecated. Whether or not the document is standalone, as specified by the XML declaration, corresponds to xmlStandalone.
strictErrorChecking: Throws DOMException on errors. Default to true.
substituteEntities: Proprietary. Whether or not to substitute entities. This attribute is not part of the DOM specification and is specific to libxml.

Caution
Enabling entity substitution may facilitate XML External Entity (XXE) attacks.
validateOnParse: Loads and validates against the DTD. Default to false.
version: Deprecated. Version of XML, corresponds to xmlVersion.
xmlEncoding: An attribute specifying, as part of the XML declaration, the encoding of this document. This is null when unspecified or when it is not known, such as when the Document was created in memory.
xmlStandalone: An attribute specifying, as part of the XML declaration, whether this document is standalone. This is false when unspecified.
xmlVersion: An attribute specifying, as part of the XML declaration, the version number of this document. If there is no declaration and if this document supports the "XML" feature, the value is "1.0".