Object oriented style:
class XMLWriter {Procedural style:
bool xmlwriter_start_document ( resource xmlwriter [, string version [, string encoding [, string standalone]]] )Starts a document.
xmlwriter
Only for procedural calls. The XMLWriter resource that is being modified. This resource comes from a call to xmlwriter_open_uri() or xmlwriter_open_memory().
version
The version number of the document as part of the XML declaration. Defaults to 1.0.
encoding
The encoding of the document as part of the XML declaration. NULL by default.
standalone
yes or no. NULL by default.