访问类中另一个对象的属性- PHP

$person->name;

class Person {
    private $name;

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

class Person {
    public $name;
    private $age;
    protected $email;

    public function __construct($name, $age, $email) {
        $this->name = $name;
        $this->age = $age;
        $this->email = $email;
    }

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

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

$person = new Person("John", 25, "john@example.com");
echo $person->name; // 输出：John

// 无法直接访问私有属性和受保护的属性
// echo $person->age; // 错误：无法访问私有属性
// echo $person->email; // 错误：无法访问受保护的属性

echo $person->getAge(); // 输出：25
// echo $person->getEmail(); // 错误：无法访问受保护的方法