OOP Learning Mode

What will be the output of the following PHP code

class Person 
{
    function getName() { return "Bob"; }
    function getAge() { return 44; }
    function __toString() {
        $desc = $this->getName();
        $desc .= " (age ".$this->getAge().")";
        return $desc;
    }
}
$person = new Person();
print $person;