Symfony2在响应侦听器中获取当前环境

Question

我想知道我是否在监听器中使用app_dev.php(设置为服务config.yml).它在getEnvironment()失败,尽管这是我在控制器中使用的方法.

public function onKernelResponse(FilterResponseEvent $event) {
    $kernel = $event->getKernel();
    $this->isAppDev = ($kernel->getEnvironment() == "dev") ? true : false;
}

编辑解决方案:在我的监听器类中:

use Symfony\Component\HttpFoundation\Response; 
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpKernel\Kernel;
private $kernel;
public function __construct(Kernel $kernel) {
    $this->kernel = $kernel
}
public function onKernelResponse(FilterResponseEvent $event) {
    $this->isAppDev = ($this->kernel->getEnvironment() == "dev") ? true : false;
}

在config.yml的底部:

services:
   my.listener:
       class: Path\To\Listener
       tags:
           - { name: kernel.event_listener, event: kernel.response }
       arguments: [@kernel]

Answer 1

$ event-> getKernel()返回一个实现HttpKernelInterface的对象.而Kernel或AppKernel实现KernelInterface都有getEnvironment方法.你必须@kernel在你的听众中注入服务.