asp.net webservice how to make compatible with PHP and other languages

I am currently creating a web service in vb.net and I would like to ask the community what is the best way to make this compatible for PHP users and other languages.

An example of my code is as follows:

Public Shared Function GetBasketInfo(ByVal sessionid As String, ByRef ds As DataSet, ByVal attributes     

As String) As DataRow

If String.IsNullOrEmpty(attributes) Then
  Throw New ArgumentNullException("Please supply a manufacturer")
End If

Dim l As New List(Of String)

l = _serializer.SplitAttributes(attributes)


Dim s As String
Dim p(1) As SqlParameter
Dim dt As DataTable

's = "exec MSLStore1_GetOrderInfo @userid, @orderid"


dt = ExecuteDataTableDT("MSLStore1_GetOrderInfo", _
                     New SqlParameter("@userid", StoI(l(0))), _
                       New SqlParameter("@orderid", StoI(l(1)))
                     )开发者_开发百科



  Return dt.Rows(0)

   End Function 

My question is will this method be compatible with PHP consumption. If not can someone point me to the right direction.

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The answer to this can be found here:

http://forums.asp.net/t/887892.aspx/1

More importantly the last posting, you would consume your ASP.NET web service by saving the .wdsl file (web service) and doing the following in PHP:

$client = new SoapClient("http://localhost/csharp/web_service.asmx?wsdl");

print_r( $client->Add(array("a" => "5", "b" =>"2")));