Object oriented style:
class XMLWriter {Procedural style:
bool xmlwriter_start_document ( resource xmlwriter [, string version [, string encoding [, string standalone]]] )Starts a document.
xmlwriterApenas para chamadas de procedimentos. O recurso XMLWriter resource que esta sendo modificado. Este recurso vem de uma chamada a xmlwriter_open_uri() ou xmlwriter_open_memory().
versionThe version number of the document as part of the XML declaration. Defaults to 1.0.
encodingThe encoding of the document as part of the XML declaration. NULL by default.
standaloneyes or no. NULL by default.