--TEST--
Bug #41947 (addChild incorrectly registers empty strings as namespaces)
--SKIPIF--
<?php if (!extension_loaded("simplexml")) print "skip"?>
--FILE--
<?php
$xml 
simplexml_load_string('<?xml version="1.0" encoding="utf-8"?><root xmlns:myns="http://myns" />');
$grandchild $xml->addChild('child'null'http://myns')->addChild('grandchild''hello''');

$gchild $xml->xpath("//grandchild");
if (
count($gchild) > 0) {
    echo 
$gchild[0]."\n";
}
?>
===DONE===
--EXPECT--
hello
===DONE===