nusoap如何封装请求头

考虑到安全因素，因此需要WS的客户端在调用服务的时候，请求头需要包含一个验证信息，否则服务将不可访问。实现方式为注册一个CallbackHandler，进行identifier的验证。

        $client = new SoapClient($url);        $soap_header = New SoapHeader($url, 'CallbackHandler', 'wsAdmin',FALSE, SOAP_ACTOR_NEXT);        $client->__setSoapHeaders(array($soap_header));        $info = $client->__soapCall('getClassStudent', array('userId' => 1));print_r($info);            

SoapFault exception: [ns1:InvalidSecurity] An error was discovered processing the header in /var/www/html/Exam/Lib/Action/Home/IndexAction.class.php:264 Stack trace: #0 

$xml = '                                        admin                    PasswordText                                        ';$s = new SoapHeader('http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd', 'CallbackHandler', new SoapVar($xml, XSD_ANYXML), TRUE);$client = new SoapClient($wsdl);$client->__setSoapHeaders(array($s));print_r($client);