PHP Late 정적 바인딩: 액세스 제어를 최적화하는 기술적 수단

class ParentClass {
    private static $privateStaticProperty = 'Private Static Property';

    private static function privateStaticMethod() {
        echo 'Private Static Method';
    }

    public function accessPrivateStaticProperty() {
        echo self::$privateStaticProperty; // 访问私有静态属性
    }

    public function accessPrivateStaticMethod() {
        self::privateStaticMethod(); // 调用私有静态方法
    }
}

class ChildClass extends ParentClass {
    private static $privateStaticProperty = 'Child Class Private Static Property';

    public function accessParentPrivateStaticProperty() {
        echo ParentClass::$privateStaticProperty; // 访问父类私有静态属性
    }

    public function accessParentPrivateStaticMethod() {
        ParentClass::privateStaticMethod(); // 调用父类私有静态方法
    }

    public function accessSelfPrivateStaticProperty() {
        echo self::$privateStaticProperty; // 访问子类私有静态属性
    }

    public function accessSelfPrivateStaticMethod() {
        self::privateStaticMethod(); // 调用子类私有静态方法
    }
}

$childObj = new ChildClass();
$childObj->accessPrivateStaticProperty(); // 输出：Child Class Private Static Property
$childObj->accessPrivateStaticMethod(); // 输出：Private Static Method
$childObj->accessParentPrivateStaticProperty(); // 输出：Private Static Property
$childObj->accessParentPrivateStaticMethod(); // 输出：Private Static Method
$childObj->accessSelfPrivateStaticProperty(); // 输出：Child Class Private Static Property
$childObj->accessSelfPrivateStaticMethod(); // 输出：Private Static Method