Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

XML constants
ConstantsValueDescription
XML_ELEMENT_NODE (int)1Node is a DOMElement / Dom\Element
XML_ATTRIBUTE_NODE (int)2Node is a DOMAttr / Dom\Attr
XML_TEXT_NODE (int)3Node is a DOMText / Dom\Text
XML_CDATA_SECTION_NODE (int)4Node is a DOMCharacterData / Dom\CharacterData
XML_ENTITY_REF_NODE (int)5Node is a DOMEntityReference / Dom\EntityReference
XML_ENTITY_NODE (int)6Node is a DOMEntity / Dom\Entity
XML_PI_NODE (int)7Node is a DOMProcessingInstruction / Dom\ProcessingInstruction
XML_COMMENT_NODE (int)8Node is a DOMComment / Dom\Comment
XML_DOCUMENT_NODE (int)9Node is a DOMDocument / Dom\Document
XML_DOCUMENT_TYPE_NODE (int)10Node is a DOMDocumentType / Dom\DocumentType
XML_DOCUMENT_FRAG_NODE (int)11Node is a DOMDocumentFragment / Dom\DocumentFragment
XML_NOTATION_NODE (int)12Node is a DOMNotation / Dom\Notation
XML_HTML_DOCUMENT_NODE (int)13 
XML_DTD_NODE (int)14 
XML_ELEMENT_DECL_NODE (int)15 
XML_ATTRIBUTE_DECL_NODE (int)16 
XML_ENTITY_DECL_NODE (int)17 
XML_NAMESPACE_DECL_NODE (int)18 
XML_ATTRIBUTE_CDATA (int)1 
XML_ATTRIBUTE_ID (int)2 
XML_ATTRIBUTE_IDREF (int)3 
XML_ATTRIBUTE_IDREFS (int)4 
XML_ATTRIBUTE_ENTITY (int)5 
XML_ATTRIBUTE_NMTOKEN (int)7 
XML_ATTRIBUTE_NMTOKENS (int)8 
XML_ATTRIBUTE_ENUMERATION (int)9 
XML_ATTRIBUTE_NOTATION (int)10 
XML_LOCAL_NAMESPACE (int) A namespace declaration node.
HTML constants
ConstantsDescription
Dom\HTML_NO_DEFAULT_NS (int)This disables setting the namespace of elements during parsing when using Dom\HTMLDocument. This exists for backwards compatibility with DOMDocument.
Caution

Some DOM methods depend on the HTML namespace being set. By using this parser option, the behaviour of those methods can be influenced.

DOMException / Dom\Exception constants
ConstantsValueDescription
DOM_PHP_ERR (int)0Error code not part of the DOM specification. Meant for PHP errors. Deprecated as of PHP 8.4.0 because this is no longer used. Prior to PHP 8.4.0, this was inconsistently used to indicate out-of-memory situations.
DOM_INDEX_SIZE_ERR / Dom\INDEX_SIZE_ERR (int)1If index or size is negative, or greater than the allowed value.
DOMSTRING_SIZE_ERR / Dom\STRING_SIZE_ERR (int)2If the specified range of text does not fit into a string.
DOM_HIERARCHY_REQUEST_ERR / Dom\HIERARCHY_REQUEST_ERR (int)3If any node is inserted somewhere it doesn't belong
DOM_WRONG_DOCUMENT_ERR / Dom\WRONG_DOCUMENT_ERR (int)4If a node is used in a different document than the one that created it.
DOM_INVALID_CHARACTER_ERR / Dom\INVALID_CHARACTER_ERR (int)5If an invalid or illegal character is specified, such as in a name.
DOM_NO_DATA_ALLOWED_ERR / Dom\NO_DATA_ALLOWED_ERR (int)6If data is specified for a node which does not support data.
DOM_NO_MODIFICATION_ALLOWED_ERR / Dom\NO_MODIFICATION_ALLOWED_ERR (int)7If an attempt is made to modify an object where modifications are not allowed.
DOM_NOT_FOUND_ERR / Dom\NOT_FOUND_ERR (int)8If an attempt is made to reference a node in a context where it does not exist.
DOM_NOT_SUPPORTED_ERR / Dom\NOT_SUPPORTED_ERR (int)9If the implementation does not support the requested type of object or operation.
DOM_INUSE_ATTRIBUTE_ERR / Dom\INUSE_ATTRIBUTE_ERR (int)10If an attempt is made to add an attribute that is already in use elsewhere.
DOM_INVALID_STATE_ERR / Dom\INVALID_STATE_ERR (int)11If an attempt is made to use an object that is not, or is no longer, usable.
DOM_SYNTAX_ERR / Dom\SYNTAX_ERR (int)12If an invalid or illegal string is specified.
DOM_INVALID_MODIFICATION_ERR / Dom\INVALID_MODIFICATION_ERR (int)13If an attempt is made to modify the type of the underlying object.
DOM_NAMESPACE_ERR / Dom\NAMESPACE_ERR (int)14If an attempt is made to create or change an object in a way which is incorrect with regard to namespaces.
DOM_INVALID_ACCESS_ERR / Dom\INVALID_ACCESS_ERR (int)15If a parameter or an operation is not supported by the underlying object.
DOM_VALIDATION_ERR / Dom\VALIDATION_ERR (int)16If a call to a method such as insertBefore or removeChild would make the Node invalid with respect to "partial validity", this exception would be raised and the operation would not be done.