如何在PHP中访问祖父母方法

class Grandparent {
    public function grandparentMethod() {
        echo "This is the grandparent's method.";
    }
}

class ParentClass extends Grandparent {
    public function parentMethod() {
        echo "This is the parent's method.";
    }
}

class ChildClass extends ParentClass {
    public function childMethod() {
        echo "This is the child's method.";
    }

    public function accessGrandparentMethod() {
        parent::parentMethod(); // 访问父类的方法
        parent::grandparentMethod(); // 访问祖父类的方法
    }
}

$child = new ChildClass();
$child->accessGrandparentMethod();