Object oriented style:
mixed flush(bool empty);
Flushes the current buffer.
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().
Whether to empty the buffer or no. Default is
If you opened the writer in memory, this function returns the generated XML buffer,
Else, if using URI, this function will write the buffer and return the number of