调试 PHP SOAP 调用

The error that I am getting is "Server did not recognize the value of HTTP Header SOAPAction:" with that training colon suggesting no value is passed, maybe.

我的代码如下:

$URL = "http://nolaflash.example.com/xxxWS/eServices.asmx";

$namespace="http://www.example.com/webservices/";

include("SOAP/Client.php");

$soapclient = new SOAP_Client($URL);

$xml_data = // valid XML is here;

$res = $soapclient->UpdateData('usrname','pass',$xml_data);

但我也尝试过:

$param = array('usrname','pass',$xml_data);
$res = $soapclient->call('UpdateData',$param, $namespace);

谷歌搜索表明此错误是命名空间问题.我的 C# 代码只有一个命名空间引用:

[System.Web.Services.WebServiceBindingAttribute(Name="eServicesSoap", Namespace="http://www.example.com/webservices/")]