如何通过php soapheader 验证文中的xml的头信息

如下文的wsdl文件我如何通过soap来验证header中的code和token信息SoapHeader的命名空间和方法名应该是什么？<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ws="http://ws.ws.mall.b2b.vic.com/">
   <soapenv:Header>
     <authrity>
                    <code>12323232323</code>
                    <token>23333</token>
                    </authrity>
                    </soapenv:Header>
   <soapenv:Body>
      <ws:addSx>
         <OrderInfoList>
            <csChannelType>其他</csChannelType>
            <csCity>?</csCity>
            <!--Optional:-->
            <csCounty>?</csCounty>
            <csCustaddress>北京北京市东城区楼下等你</csCustaddress>
            <csCustname>马甲</csCustname>
         </OrderInfoList>
      </ws:addSx>
   </soapenv:Body>
</soapenv:Envelope>
----------------------------------------------------
我的做法：
$client=new SoapClient($this->url_addr_addsx);
        //var_dump($client->__getTypes());
        $header = new SoapHeader($this->url_addr_addsx, 'authrity', array('code'=>$this->dealierId,'token'=>$this->token), false, SOAP_ACTOR_NEXT);   
        $client->__setSoapHeaders($header);
        $result=$client->addSx($xml_str);
        var_dump($result);报的错误是：
An uncaught Exception was encounteredType: SoapFaultMessage: 找不到code信息是哪里错误了？