<?php
  class Arvutaja{
     private $arv1, $arv2;
	 function __construct($a1, $a2){
	    $this->arv1=$a1;
		$this->arv2=$a2;
	 }
	 function kysiSumma(){
	    return $this->arv1+$this->arv2;
	 }
  }
  
  $a=new Arvutaja(3, 5);
  echo $a->kysiSumma();