Simulating .NET's ScriptService in PHP

<?
// MyScriptService.php

// Clayton Rumley, digifi inc., clayton@digifi.ca
// www.digifi.ca

include_once 'digifiss.php';

class MyScriptService extends DigifiScriptService
{
  //This is a public function which will be turned into a ScriptMethod
  public function HelloWorld()
  {
    return "Hello World";
  }
  
  //A ScriptMethod with arguments:
  public function Add($x, $y)
  {
    return $x + $y;
  }
  
  //A private method, will be ignored by the JavaScript generator:
  private function DoSomethingPrivate()
  {
    return "Not Exposed";
  }
}

//This is the only line of initialization required:
new MyScriptService();
?>