Manual:$wgMWLoggerDefaultSpi/de-formal

Details
The value should be an array suitable for use with. The created object is expected to implement the  interface. See  for additional details.

creates  instances that will discard all logging events.


 * (default) creates  instances which mimic the historic implementation of MediaWiki's   logging implementation.

See for configuration settings.
 * creates loggers implemented by Monolog.