<?php
  class Rest1{
     function korruta($a, $b){
        return json_encode(array("a" => $a, "b" => $b, "tulemus" => $a*$b));
     }
     function tootleUrl(){
        if(isSet($_REQUEST["tegevus"])){
           if($_REQUEST["tegevus"]=="korruta"){
              return $this->korruta($_REQUEST["a"], $_REQUEST["b"]);
           }
        }
     }     
  }
  
  $r=new Rest1();
  echo $r->tootleUrl();