__get multipli in una classe

[Skillsfactory]

class demo
{
    protected $prova = array ('foo' => array ('a' => '1', 'b' => '0'), 'bar' => array ('c' => '2','d' => '3'));
    function __construct( )
    {
    }
    function __get( $name )
    {
        return $this->prova[$name];
    }


}

$x = new demo ;


echo $x->foo['a']; 

1