(PHP 5 >= 5.1.2, PECL xmlwriter >= 0.1.0)
XMLWriter::outputMemory -- xmlwriter_output_memory — Returns current buffer
Object oriented style
$flush = true
  ] )Procedural style
$xmlwriter
   [, bool $flush = true
  ] )Returns the current buffer.
xmlwriterOnly for procedural calls. The XMLWriter resource that is being modified. This resource comes from a call to xmlwriter_open_uri() or xmlwriter_open_memory().
flush
       Whether to flush the output buffer or not. Default is TRUE.
      
Returns the current buffer as a string.