class TestClass
{
    public $foo;
	public $language;

	//tar man bort // funkar det ej :S
	//$this->language = $_SESSION['language'];


    public function __construct($foo) {
        $this->language = $foo;
		$this->disp($this->language);
    }

	public function disp($what){
		echo $what.'   '.$this->language;
	}

}

$class = new TestClass($_SESSION['language']);