class Person
{
    private $firstname;
    private $lastname;

    public function __construct($pFirstname, $pLastname)
    {
        $this->firstname = $pFirstname;
        $this->lastname = $pLastname;
    }

    public function __set($name, $value)
    {
        if(isset($this->$name))
        {
            $this->$name = $value;
            return true;
        }

        $error = "Error: __set property: " . $name . " not supported by class: " . __CLASS__ ;
        throw new Exception($error);
        return false;
    }

    public function __get($name)
    {
        if(isset($this->$name))
            return $this->$name;

        $error = "Error: __get property: " . $name . " not supported by class: " . __CLASS__ . ".";
        throw new Exception($error);
        return false;
    }

    public function __toString()
    {
        return $this->firstname . " " . $this->lastname;
    }
}