Symfony web debug tool bar disappears when using sfNoLogger

问题

Why does the web debug tool bar disappear when I use sfNoLogger in the factories.yml:

dev:
  logger:
    class:   sfNoLogger
    param:
      level:   err
      loggers: ~

When I remove these lines the tool bar appears.

回答1:

Because the sf*No*Logger does not log anything. It's usually used for production.

来源：https://stackoverflow.com/questions/5119955/symfony-web-debug-tool-bar-disappears-when-using-sfnologger