How to Configure Monolog to Exclude 404 Errors from the Log

2.3 新版功能: This feature was introduced to the MonologBundle in version 2.4. This version is compatible with Symfony 2.3, but only MonologBundle 2.3 is installed by default. To use this feature, upgrade your bundle manually.

Sometimes your logs become flooded with unwanted 404 HTTP errors, for example, when an attacker scans your app for some well-known application paths (e.g. /phpmyadmin). When using a fingers_crossed handler, you can exclude logging these 404 errors based on a regular expression in the MonologBundle configuration:

• YAML

  # app/config/config.yml
  monolog:
      handlers:
          main:
              # ...
              type: fingers_crossed
              handler: ...
              excluded_404s:
                  - ^/phpmyadmin
  

• XML

  <!-- app/config/config.xml -->
  <container xmlns="http://symfony.com/schema/dic/services"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:monolog="http://symfony.com/schema/dic/monolog"
      xsi:schemaLocation="http://symfony.com/schema/dic/services
          http://symfony.com/schema/dic/services/services-1.0.xsd
          http://symfony.com/schema/dic/monolog
          http://symfony.com/schema/dic/monolog/monolog-1.0.xsd"
  >
      <monolog:config>
          <monolog:handler type="fingers_crossed" name="main" handler="...">
              <!-- ... -->
              <monolog:excluded-404>^/phpmyadmin</monolog:excluded-404>
          </monolog:handler>
      </monolog:config>
  </container>
  

• PHP

  // app/config/config.php
  $container->loadFromExtension('monolog', array(
      'handlers' => array(
          'main' => array(
              // ...
              'type'          => 'fingers_crossed',
              'handler'       => ...,
              'excluded_404s' => array(
                  '^/phpmyadmin',
              ),
          ),
      ),
  ));