PHP - Necesito añadir un namespace en una respuesta Soap

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns1="urn:query:request:v2.0">

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns1="urn:query:request:v2.0" xmlns:ns2="urn:query:type:v2.0">

class Service

{

// FUNCTIONS

}

$options= array('uri'=>'urn:query:request:v2.0',

    'cache_wsdl' => WSDL_CACHE_NONE);

$server=new SoapServer("Service.wsdl",$options);

$server->setClass('Service');

$server->addFunction(SOAP_FUNCTIONS_ALL);

$server->handle();