Direct writing of soap to call webservice

I have an http: // 192.168.19.134/service/api. php question about calling webservice by writing soap directly? Wsdl
Two simple functions, feedback and add
Soap toolkit is easy to call when I use vb.

Dim ss As New SoapClient30 ss.MSSoapInit "http://192.168.19.134/service/api.php?wsdl"MsgBox ss.feedback("zzzz")MsgBox ss.Add(34, 56)

But I want to learn how to use xmlhttp and call it through soap?

        url = "http://192.168.19.134/service/api.php?wsdl"        oXMLHttp.Open "POST", url, False        oXMLHttp.setRequestHeader "Content-Type", "text/xml; charset=utf-8"        oXMLHttp.setRequestHeader "Content-length", Len(URLEncode(postData))        oXMLHttp.setRequestHeader "Accept-Language", "zh-CN"        oXMLHttp.setRequestHeader "SOAPAction", "http://192.168.19.134/service/api.php?wsdl"        oXMLHttp.setRequestHeader "Host", "192.168.19.134"        oXMLHttp.Send URLEncode(postData)

Postdata

        postData = "
 "        postData = postData & "
 
  "        postData = postData & "
  
   "        postData = postData & "
   
    "        postData = postData & "
    
     1
    "        postData = postData & "
    
     2
    "        postData = postData + "
   "        postData = postData + "
  "        postData = postData + "
 "

When I send a message like this, I always receive a 500 error. what is the error?

Reply to discussion (solution)

Eldest brother. It seems to be a php Forum ..

Does your soap server support the get or post method?

Supported

Does your soap server support the get or post method?