SOAP web service with optional arguments

webservice.cfc

<!--- http://stackoverflow.com/questions/32385955/soap-web-service-with-optional-arguments?noredirect=1#comment52650901_32385955 --->

<cfcomponent output="false">

	<cffunction name="myFunc" returntype="struct" access="remote">
		<cfargument name="mParam" type="numeric" required="true">
		<cfargument name="oParam" type="string" required="false" default="strDefault">

		<cfreturn Arguments>
	</cffunction>

</cfcomponent>

webservice.cfm

<!--- only works when both cfinvokeargument tags are present --->
<cfinvoke method="myFunc" webservice="http://tester002/webservice.cfc?wsdl" returnvariable="ws">
	<cfinvokeargument name="mParam" value="1">
	<cfinvokeargument name="oParam" value="1">
</cfinvoke>
<cfdump var="#ws#">

webservice.php

<?php
// works if only one argument is present
$requestParams = array(
	'mParam' => 2
);

try {
	$client = new SoapClient('http://tester002/webservice.cfc?wsdl');
	$response = $client->myFunc($requestParams);

	print_r($response);

} catch( Exception $ex ) {
	var_dump( $ex );
}

webservice.vb

' works if only one parameter is set
Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Dim c = New webservice001.webservice.webservicecfcPortTypeClient("webservice.cfcHttpSoap12Endpoint")
        Dim r As New webservice001.webservice.myFuncRequest

        r.mParam = 1
        Dim resp = c.webservice_webservicecfcPortType_myFunc(r)

    End Sub
End Class