我已尝试设置 Symfony 4。我按照此处列出的教程进行操作:https://symfony.com/doc/4.0/setup.html

然而，当我尝试运行服务器时，我得到:

我没有做任何更改， Composer 似乎正在获取所有必要的依赖项。我之前运行 PHP 进行检查，没有遗漏任何关键信息:

我真的被困在这里，因为这段代码应该可以工作(它可以为我认识的任何其他人工作)并且它来自一个会检查它的来源。

Update: Result from console from running router debug: 
 -------------------------- -------- -------- ------ -----------------------------------
  Name                       Method   Scheme   Host   Path
 -------------------------- -------- -------- ------ -----------------------------------
  _twig_error_test           ANY      ANY      ANY    /_error/{code}.{_format}
  _wdt                       ANY      ANY      ANY    /_wdt/{token}
  _profiler_home             ANY      ANY      ANY    /_profiler/
  _profiler_search           ANY      ANY      ANY    /_profiler/search
  _profiler_search_bar       ANY      ANY      ANY    /_profiler/search_bar
  _profiler_phpinfo          ANY      ANY      ANY    /_profiler/phpinfo
  _profiler_search_results   ANY      ANY      ANY    /_profiler/{token}/search/results
  _profiler_open_file        ANY      ANY      ANY    /_profiler/open
  _profiler                  ANY      ANY      ANY    /_profiler/{token}
  _profiler_router           ANY      ANY      ANY    /_profiler/{token}/router
  _profiler_exception        ANY      ANY      ANY    /_profiler/{token}/exception
  _profiler_exception_css    ANY      ANY      ANY    /_profiler/{token}/exception.css
 -------------------------- -------- -------- ------ -----------------------------------

堆栈跟踪:

Symfony\Component\Routing\Exception\ResourceNotFoundException:

  at var/cache/dev/srcDevDebugProjectContainerUrlMatcher.php:107
  at srcDevDebugProjectContainerUrlMatcher->match('/')
     (vendor/symfony/routing/Matcher/UrlMatcher.php:95)
  at Symfony\Component\Routing\Matcher\UrlMatcher->matchRequest(object(Request))
     (vendor/symfony/routing/Router.php:262)
  at Symfony\Component\Routing\Router->matchRequest(object(Request))
     (vendor/symfony/http-kernel/EventListener/RouterListener.php:114)
  at Symfony\Component\HttpKernel\EventListener\RouterListener->onKernelRequest(object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))
  at call_user_func(array(object(RouterListener), 'onKernelRequest'), object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))
     (vendor/symfony/event-dispatcher/Debug/WrappedListener.php:104)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(object(GetResponseEvent), 'kernel.request', object(EventDispatcher))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:212)
  at Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.request', object(GetResponseEvent))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:44)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch('kernel.request', object(GetResponseEvent))
     (vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:139)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch('kernel.request', object(GetResponseEvent))
     (vendor/symfony/http-kernel/HttpKernel.php:125)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
     (vendor/symfony/http-kernel/HttpKernel.php:66)
  at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
     (vendor/symfony/http-kernel/Kernel.php:190)
  at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
     (public/index.php:37)


    Symfony\Component\HttpKernel\Exception\NotFoundHttpException:
No route found for "GET /" (from "http://localhost/my-project/")

  at vendor/symfony/http-kernel/EventListener/RouterListener.php:144
  at Symfony\Component\HttpKernel\EventListener\RouterListener->onKernelRequest(object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))
  at call_user_func(array(object(RouterListener), 'onKernelRequest'), object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))
     (vendor/symfony/event-dispatcher/Debug/WrappedListener.php:104)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(object(GetResponseEvent), 'kernel.request', object(EventDispatcher))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:212)
  at Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.request', object(GetResponseEvent))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:44)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch('kernel.request', object(GetResponseEvent))
     (vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:139)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch('kernel.request', object(GetResponseEvent))
     (vendor/symfony/http-kernel/HttpKernel.php:125)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
     (vendor/symfony/http-kernel/HttpKernel.php:66)
  at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
     (vendor/symfony/http-kernel/Kernel.php:190)
  at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
     (public/index.php:37)

最佳答案

自从新的Symfony Flex安装流程发布以来，已经有好几个这样的问题了。不确定我是否已经找到了一个很好的答案来解决这个基本上是怪癖的问题。

假设您安装了基本框架和网络服务器，然后检查路由:

composer create-project symfony/skeleton skeleton
cd skeleton
composer require server
bin/console debug:router

------ -------- -------- ------ ------ 
Name   Method   Scheme   Host   Path  
------ -------- -------- ------ ------

所以没有开箱即用的路由定义。您可以通过查看 config/routes.yaml 或空的 src/Controller 目录来确认这一点。

那么，如果您启动服务器并在浏览器中导航到/，您会期待什么？找不到/当然没有路线。相反，令人惊讶的是，您实际上得到了一个看起来像欢迎页面的东西。嗯。那是从哪里来的？实际的 FrameWork 包中没有任何内容生成它。

相反，您需要深入研究 http-kernel 组件，看看在没有定义路由的情况下尝试匹配路由时会发生什么。最终你会:

namespace Symfony\Component\HttpKernel\EventListener;
class RouterListener implements EventSubscriberInterface
    try {
        // matching a request is more powerful than matching a URL path + context, so try that first
        if ($this->matcher instanceof RequestMatcherInterface) {
            $parameters = $this->matcher->matchRequest($request);
    } catch (ResourceNotFoundException $e) {
        if ($this->debug && $e instanceof NoConfigurationException) {
            $event->setResponse($this->createWelcomeResponse());

基本上，如果您尝试匹配路由但未配置路由器(换言之，未定义路由)，则会显示欢迎页面。 Symfony 开发人员这样做的确切原因可能有点神秘。只是需要接受的东西。

现在安装分析器并检查路由。

composer req profiler
bin/console debug:router
-------------------------- -------- -------- ------ ----------------------------------- 
Name                       Method   Scheme   Host   Path                               
-------------------------- -------- -------- ------ ----------------------------------- 
_twig_error_test           ANY      ANY      ANY    /_error/{code}.
    {_format}           
_wdt                       ANY      ANY      ANY    /_wdt/{token}                      
_profiler_home             ANY      ANY      ANY    /_profiler/                        
...

我们有路线。没有特定的应用程序或框架，但现在配置了路由系统。如果我们刷新浏览器，欢迎页面会神秘地被看起来相当不祥的 Route Not Found 异常所取代。

如果您安装其他定义路由的包(例如安全包)，也会发生同样的事情。当然，symfony/website-skeleton 定义了一堆内部路由。但不是 GET/。

TLDR:默认情况下未定义 GET/路由，即使它看起来是这样。您需要自己添加。

关于php - Symfony 4 设置问题(路由器异常)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48643561/