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——/模板/ base.html.twig+ + + b /模板/ base.html.twig@@ -14,6 +14,15 @@{% endblock %}   . {% endblock %+ <标题>+ < h1 > < a href = "{{路径(主页)}}" >留言板< / > < / h1 >+ < ul >+{%表示会议中的会议%}+ 
{{conference}}
 . Id})}}">{{conference}}+ {% endfor %}+ < / ul >+ 
+ < /头>{% block body %}{% endblock %}   . {% block body %

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——/ src / EventSubscriber / TwigEventSubscriber.php+ + + b / src / EventSubscriber / TwigEventSubscriber.php@@ -2,14 +2,25 @@名称空间的应用程序\ EventSubscriber;+使用App \ Repository \ ConferenceRepository;使用Syob娱乐下载mfony \ \ EventDispatcher \ EventSubscriberInterface组件;使用Syob娱乐下载mfony \组件\ HttpKernel \ \ ControllerEvent事件;+使用树枝\环境;类TwigEventSubscriber实现EventSubscriberInterface {+私人$twig;+ private $conferenceRepository;++公共函数__construct(环境$twig, ConferenceRepository $ ConferenceRepository)+ {+ $this->twig = $twig;+ $this->conferenceRepository = $conferenceRepository;+}+onControllerEvent(ControllerEvent $event):无效{- //…+ $this->twig->addGlobal('conferences'， $this->conferenceRepository->findAll());}公共静态函数getSubscribedEvents():数组

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——/ src /仓库/ ConferenceRepository.php+ + + b / src /仓库/ ConferenceRepository.php@@ -21,6 +21,11 @@ class ConferenceRepository扩展ServiceEntityRepository父::__construct($registry, Conference::class);｝+公共函数findAll():数组+ {将其作为findBy +返回$ this - >([],['年' = > ' ASC ', '城市' = > ' ASC ']);+}+公共函数保存(会议$entity, bool $flush = false):无效{$this->getEntityManager()->persist($entity);