PHP 子类覆盖父类方法？这里有解决方案

2024-03-31 19:17:25

PHP 中子类覆盖父类方法的解决方案

问题

当你在 PHP 中有一个继承关系，子类的方法会覆盖父类的方法。这可能会导致意料之外的行为，例如失去父类方法的功能。

解决方法

为了解决这个问题，你需要在子类的构造方法中使用 parent 来调用父类的构造方法，并传递父类构造方法所需的所有参数。这将确保子类的方法不会覆盖父类的方法，而是扩展它们。

修改后的子类构造方法

public function __construct(
    MetadataInterface $metadata,
    RequestConfigurationFactoryInterface $requestConfigurationFactory,
    ?ViewHandlerInterface $viewHandler,
    RepositoryInterface $repository,
    FactoryInterface $factory,
    NewResourceFactoryInterface $newResourceFactory,
    ObjectManager $manager,
    SingleResourceProviderInterface $singleResourceProvider,
    ResourcesCollectionProviderInterface $resourcesFinder,
    ResourceFormFactoryInterface $resourceFormFactory,
    RedirectHandlerInterface $redirectHandler,
    FlashHelperInterface $flashHelper,
    AuthorizationCheckerInterface $authorizationChecker,
    EventDispatcherInterface $eventDispatcher,
    ?StateMachineInterface $stateMachine,
    ResourceUpdateHandlerInterface $resourceUpdateHandler,
    ResourceDeleteHandlerInterface $resourceDeleteHandler,
    Sender $sender,
    ChannelContextInterface $channelContext,
    LocaleContextInterface $localeContext
) {
    parent::__construct(
        $metadata,
        $requestConfigurationFactory,
        $viewHandler,
        $repository,
        $factory,
        $newResourceFactory,
        $manager,
        $singleResourceProvider,
        $resourcesFinder,
        $resourceFormFactory,
        $redirectHandler,
        $flashHelper,
        $authorizationChecker,
        $eventDispatcher,
        $stateMachine,
        $resourceUpdateHandler,
        $resourceDeleteHandler
    );
    $this->sender = $sender;
    $this->channelContext = $channelContext;
    $this->localeContext = $localeContext;
}