The DOMDocumentType class
Introduction
Each DOMDocument has a doctype attribute whose value is either NULL or a DOMDocumentType object.
Class synopsis
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 DOMNamedNodeMap containing the general entities, both external and internal, declared in the DTD. 
- notations
- 
      A DOMNamedNodeMap containing the notations declared in the DTD. 
- internalSubset
- 
      The internal subset as a string, or null if there is none. This is does not contain the delimiting square brackets.