--TEST--
Bug #41287 (Namespace functions don't allow xmlns definition to be optional)
--EXTENSIONS--
xmlwriter
--FILE--
openMemory();
$xw->setIndent(true);
$xw->startDocument();
$xw->startElementNS('test', 'test', 'urn:x-test:');
$xw->writeElementNS('test', 'foo', null, '');
$xw->writeElementNS(null, 'bar', 'urn:x-test:', '');
$xw->writeElementNS(null, 'bar', '', '');
$xw->endElement();
$xw->endDocument();
print $xw->flush(true);
?>
--EXPECT--