monolog.yaml

monolog:
    handlers:
        main:
            type: fingers_crossed
            action_level: error
            handler: grouped
            excluded_404s:
                # regex: exclude all 404 errors from the logs
                - ^/
        grouped:
            type:    group
            members: [file, stderr]
        file:
            type: stream
            path: "%kernel.logs_dir%/%kernel.environment%.log"
            level: debug
        console:
            type: console
            process_psr_3_messages: false
            channels: ["!event", "!doctrine"]
        deprecation:
            type: stream
            path: "%kernel.logs_dir%/%kernel.environment%.deprecations.log"
        deprecation_filter:
            type: filter
            handler: deprecation
            max_level: info
            channels: ["php"]
        stderr:
            type: stream
            path: "php://stderr"
            level: debug