DOM XML (PHP 4)
PHP Manual

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
Constant Value Description
XML_ELEMENT_NODE (integer) 1 Node is an element
XML_ATTRIBUTE_NODE (integer) 2 Node is an attribute
XML_TEXT_NODE (integer) 3 Node is a piece of text
XML_CDATA_SECTION_NODE (integer) 4  
XML_ENTITY_REF_NODE (integer) 5  
XML_ENTITY_NODE (integer) 6 Node is an entity like  
XML_PI_NODE (integer) 7 Node is a processing instruction
XML_COMMENT_NODE (integer) 8 Node is a comment
XML_DOCUMENT_NODE (integer) 9 Node is a document
XML_DOCUMENT_TYPE_NODE (integer) 10  
XML_DOCUMENT_FRAG_NODE (integer) 11  
XML_NOTATION_NODE (integer) 12  
XML_GLOBAL_NAMESPACE (integer) 1  
XML_LOCAL_NAMESPACE (integer) 2  
XML_HTML_DOCUMENT_NODE (integer)    
XML_DTD_NODE (integer)    
XML_ELEMENT_DECL_NODE (integer)    
XML_ATTRIBUTE_DECL_NODE (integer)    
XML_ENTITY_DECL_NODE (integer)    
XML_NAMESPACE_DECL_NODE (integer)    
XML_ATTRIBUTE_CDATA (integer)    
XML_ATTRIBUTE_ID (integer)    
XML_ATTRIBUTE_IDREF (integer)    
XML_ATTRIBUTE_IDREFS (integer)    
XML_ATTRIBUTE_ENTITY (integer)    
XML_ATTRIBUTE_NMTOKEN (integer)    
XML_ATTRIBUTE_NMTOKENS (integer)    
XML_ATTRIBUTE_ENUMERATION (integer)    
XML_ATTRIBUTE_NOTATION (integer)    
XPATH_UNDEFINED (integer)    
XPATH_NODESET (integer)    
XPATH_BOOLEAN (integer)    
XPATH_NUMBER (integer)    
XPATH_STRING (integer)    
XPATH_POINT (integer)    
XPATH_RANGE (integer)    
XPATH_LOCATIONSET (integer)    
XPATH_USERS (integer)    
XPATH_NUMBER (integer)    

DOM XML (PHP 4)
PHP Manual