<?php 

class Test {
	private $real_a = 2;
	
	function __set($property, $value) {
	  if ($property == "a") {
	    $this->real_a = $value;
	  }
	}

	function __get($property) {
	  if ($property == "a") {
	    return $this->real_a;
	  }
	}
}

$obj = new Test;
var_dump($obj->a);
$obj->a += 2;
var_dump($obj->a);
echo "---Done---\n";
?>
