php man page for xmlwriter_flush

XMLWRITER_FLUSH(3)							 1							XMLWRITER_FLUSH(3)

XMLWriter::flush - Flush current buffer

       Object oriented style

SYNOPSIS
       mixed XMLWriter::flush ([bool  $empty = true])

DESCRIPTION
       Procedural style
       mixed xmlwriter_flush (resource	$xmlwriter, [bool  $empty = true])

	Flushes the current buffer.

PARAMETERS
	      o $
		xmlwriter  -Only  for  procedural  calls.  The	XMLWriter resource that is being modified. This resource comes from a call to xml-
		writer_open_uri(3) or xmlwriter_open_memory(3).

	      o $empty
		- Whether to empty the buffer or not. Default is TRUE.

RETURN VALUES
	If you opened the writer in memory, this function returns the generated XML buffer, Else, if using URI, this function will write the  buf-
       fer and return the number of written bytes.

PHP Documentation Group 													XMLWRITER_FLUSH(3)