CURL中PHP中的SOAP请求

Question

我已经好几天了，因为我试图找出SOAP但没有成功:(有机会知道如何创建PHP（curl）SOAP请求看起来像这样吗？

POST /WebServices/domain.asmx HTTP/1.1
Host: webservices.domain.ru
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://www.domain.ru/GetVariants"


<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
               xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Header>
    <AuthentificationHeader xmlns="http://www.domain.ru/">
      <Login>string</Login>
      <Password>string</Password>
      <PartnerId>string</PartnerId>
    </AuthentificationHeader>
  </soap:Header>
  <soap:Body>
    <GetVariants xmlns="http://www.domain.ru/">
      <RequestParameters>xml</RequestParameters>
    </GetVariants>
  </soap:Body>
</soap:Envelope>

我也有以下数据：

WSDL: 
http://webservices.domain.ru/WebServices/domainXml.asmx?WSDL
Soap action: 
http://webservices.domain.ru/WebServices/domainXml.asmx?op=GetVariants