This function returns a new instance of class DomAttribute. The name of the attribute is the value of the first parameter. The value of the attribute is the value of the second parameter. This node will not show up in the document unless it is inserted with e.g. DomNode_append_child().
The return value is false if an error occured.
See also DomNode_append_child(), DomDocument_create_element(), DomDocument_create_text(), DomDocument_create_cdata_section(), DomDocument_create_processing_instruction(), DomDocument_create_entity_reference(), DomNode_insert_before().