PHP Soap Client：如何使用Derived类调用WebService作为参数？

Question

I'm using PHP 5, and want to call a webservice that is defined sort of like this:

webmethod ( AbstractBase obj );

I'm using a SoapClient (wsdl-based). The web method is expecting a subclass of AbstractBase. Yet, in PHP, calling the soap method gets me this error:

    Server was unable to read request. 
        ---> There is an error in XML document  
        ---> The specified type is abstract: name='AbstractBase'

I'm pretty sure the problem is I have to specify the type of the obj parameter in the Soap call - but I can't seem to find the magic word to make it so.

    $client = new SoapClient($WSDL, $soapSettings);
    $obj = array(
        'internal_id' => $internalId,
        'external_id' => $externald,
    );
    $params = array(
        'obj'      => $obj  // How do I say it is of type: DerivedClass?
    );

    $response = $client->webmethod($params);

Answer 1

That was a good suggestion, but it didn't work either. But it got me going in the right direction. I took your idea, created the 2 classes, and tried to explicitly set the type of the object with a SoapVar and XSD_ANYTYPE. That almost worked - but it did not set the name space (ns1:) on the fields in the class.

SO how did I eventually fix this? It took 2 things.

I discovered the wonderful XSD_ANYXML. This lets me roll my own XML for the request. By itself it failed to add the xsi namespace to the soap envelope. So I had to force one parameter to be an XSD_STRING to wake up the code that was building the request. My working code is:

$client = new SoapClient($WSDL, $soapSettings);
$myXml = "
  <ns1:obj xsi:type='ns1:DerivedClass'>
    <ns1:internal_id>$internalId</ns1:internal_id>
    <ns1:external_id>$externalId</ns1:external_id>
  </ns1:obj>
";

$params = array(
    // this is needed to force the XSI namespace in the header (there must be a better way)
    'foo' => new SoapVar('bar', XSD_STRING, 'String, 'http://www.w3.org/2001/XMLSchema-instance'),
    // this uses the XML I created
    'obj' => new SoapVar($myXml, XSD_ANYXML),
);

$response = $client->webmethod($params);