creating multiple xml nodes with same namespaces in php - php

Question

I have the following code
$dom = new DOMDocument('1.0', 'utf-8');
$headerNS = $dom->createElementNS('http://somenamespace', 'ttauth:authHeader');
$accesuser = $dom->createElementNS('http://somenamespace', 'ttauth:Accessuser','aassdd');
$accesscode = $dom->createElementNS('http://somenamespace', 'ttauth:Accesscode','aassdd');
$headerNS->appendChild($accesuser);
$headerNS->appendChild($accesscode);
echo "<pre>";
echo ($dom->saveXML($headerNS));
echo "</pre>";
IT will produce the following xml as output
<?xml version="1.0" ?>
<ttauth:authHeader xmlns:ttauth="http://somenamespace">
<ttauth:Accessuser>
ApiUserFor136
</ttauth:Accessuser>
<ttauth:Accesscode>
test1234
</ttauth:Accesscode>
</ttauth:authHeader>
But I want the following output
<ttauth:authHeader xmlns:ttauth="http://somenamespace">
<ttauth:Accessuser xmlns:ttauth="http://somenamespace">
aassdd
</ttauth:Accessuser>
<ttauth:Accesscode xmlns:ttauth="somenamespace">
aassdd
</ttauth:Accesscode>
</ttauth:authHeader>
See the xmlns is not included in elements other than root element but I want xmlns to be included in all elements Is there anything I am doing wrong ??

Answer 1

Probably the PHP parser does not add renaming of the same namespace "http://somenamespace" with the same prefix "ttauth" because it is redundant. Both xmls you shown ( the output and expected ) are equivalent. If you want to be sure you have the namespaces attributes as you want, you should add them manually by using addAtribute - http://www.php.net/manual/en/domdocument.createattribute.php. See the following code snippet:
$domAttribute = $domDocument->createAttribute('xmlns:ttauth');
$domAttribute->value = 'http://somenamespace';
$accessuser->appendChild($domAttribute);
Hope it helps

Answer 2

instead of using
$accesuser = $dom->createElementNS('http://somenamespace', 'ttauth:Accessuser','aassdd');
I used
$accesuser = $dom->createElement('http://somenamespace', 'ttauth:Accessuser','aassdd');
and then
$accesuser->setAttribute('xmlns:ttauth', ('http://somenamespace');
it works fine for any number of nodes