How can I make Symfony 3 Console exception logging visible only on the console?

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You can make Symfony 3 Console exception logging visible only on the console by modifying the Monolog configuration.

1. Open the config.yml file in your Symfony project

2. Locate the Monolog configuration section. It should look something like this:

   monolog:
      handlers:
          main:
              type: stream
              path: "%kernel.logs_dir%/%kernel.environment%.log"
              level: debug
              channels: [!event]
   

3. Add a new console handler:

   monolog:
      handlers:
          main:
              type: stream
              path: "%kernel.logs_dir%/%kernel.environment%.log"
              level: debug
              channels: [!event]
          console:
              type: console
              process_psr_3_messages: false
              channels: ["!event", "!doctrine"]
   

4. Save the file and run the Symfony console commands as usual. The exceptions will now only be visible on the console output.

The process_psr_3_messages option is set to false to prevent console messages from being duplicated in the log file. The channels option tells Monolog which channels to log to the console. In this configuration, we're excluding the event and doctrine channels. Feel free to modify this setting based on your specific needs.