How to call a WCF / ASMX web service from PHP

http://www.sbp-romania.com/Blog/2014/11/05/how-to-call-a-wcf-asmx-web-service-from-php.aspx

How to implement Textbox auto-complete in ASP.NET web forms?

1. Ajax toolkit: AutoCompleteExtender
Reference:
http://www.asp.net/ajax/ajaxcontroltoolkit/samples/autocomplete/autocomplete.aspx
2. JQuery+Web service
http://rayaspnet.blogspot.com/2011/01/how-to-call-aspnet-web-service-from.html

How to call asp.net web service from Jquery?

        $.ajax({

            type: "POST",

            contentType: "application/json; charset=utf-8",

            url: '<%=ResolveClientUrl("~/WebServices/example.asmx/Method")%>',

            data: "{'parameter1':'" + parametervalue1 + "'}",

            dataType: "json",

            async: false,

            success: function (data) {alert(data.d);}

        });

Reference:

http://api.jquery.com/jQuery.ajax/