<?php
  class Hoidla{
	  private $arvud=array();
      public function lisa($arv){
		  array_push($this->arvud, $arv);
	  }	  
	  public function kogus(){
		  return count($this->arvud);
	  }
  }
  
  $vanused = new Hoidla();
  $vanused->lisa(25);
  $vanused->lisa(11);
  echo $vanused->kogus();