深入了解PHP trait DTO的扩展性与定制性

trait UserDTO {
    private $name;
    private $age;

    public function getName() {
        return $this->name;
    }

    public function setName($name) {
        $this->name = $name;
    }

    public function getAge() {
        return $this->age;
    }

    public function setAge($age) {
        $this->age = $age;
    }
}

class User {
    use UserDTO;
    private $email;

    public function getEmail() {
        return $this->email;
    }

    public function setEmail($email) {
        $this->email = $email;
    }
}

$user = new User();
$user->setName('John');
$user->setAge(30);
$user->setEmail('john@example.com');

echo 'Name: ' . $user->getName() . '<br>';
echo 'Age: ' . $user->getAge() . '<br>';
echo 'Email: ' . $user->getEmail() . '<br>';

trait SerializableDTO {
    public function serialize() {
        return json_encode(get_object_vars($this));
    }
}

class User {
    use SerializableDTO;
    // ...
}

$user = new User();
$user->setName('John');
$user->setAge(30);
$user->setEmail('john@example.com');

echo $user->serialize();