使用PHP的本机SOAP类时生成WSDL？

$server = new SoapServer("my_web_service.wsdl");

<?xml version="1.0"?><definitions name="MyWebService"
    targetNamespace="http://example.com/my_web_service"
    xmlns:tns="http://example.com/my_web_service"
    xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns="http://schemas.xmlsoap.org/wsdl/">

   <types>
        <xsd:schema targetNamespace="http://example.com/my_web_service">
            <xsd:element name="MyRequest">
                <xsd:complexType>
                    <xsd:sequence>
                        <xsd:element name="param1" type="xsd:string"/>
                        <xsd:element name="param2" type="xsd:string"/>
                    </xsd:sequence>
                </xsd:complexType>
            </xsd:element>
            <xsd:element name="MyResponse">
                <xsd:complexType>
                    <xsd:sequence>
                        <xsd:element name="result" type="xsd:string"/>
                    </xsd:sequence>
                </xsd:complexType>
            </xsd:element>
        </xsd:schema>
    </types>

   <message name="MyRequest">
        <part name="parameters" element="tns:MyRequest"/>
    </message>
   <message name="MyResponse">
        <part name="parameters" element="tns:MyResponse"/>
    </message>

    <portType name="MyWebServicePortType">
       <operation name="MyOperation">
           <input message="tns:MyRequest"/>
           <output message="tns:MyResponse"/>
        </operation>
    </portType>

   <binding name="MyWebServiceBinding" type="tns:MyWebServicePortType">
        <soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
       <operation name="MyOperation">
            <soap:operation soapAction="http://example.com/my_web_service"/>
           <input>
                <soap:body use="encoded" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://example.com/my_web_service"/>
            </input>
           <output>
                <soap:body use="encoded" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://example.com/my_web_service"/>
            </output>
        </operation>
    </binding>

   <service name="MyWebService">
        <port name="MyWebServicePort" binding="tns:MyWebServiceBinding">
            <soap:address location="http://example.com/my_web_service.php"/>
        </port>
    </service>

</definitions>

function MyOperation($param1, $param2) {
    $result = $param1 + $param2;
    return $result;
}

$server->addFunction("MyOperation");
$server->handle();

$client = new SoapClient("my_web_service.wsdl");
$result = $client->MyOperation("2", "3");
echo "Result: " . $result;