如何更改Laravel 5中的默认日志？

Question

Laravel 5 only has one place to configure logging. You can specify if you want daily log files or a single log file.

I want to use my own monolog instance, but I can't seem to figure out what the proper place is to assign it to Laravel Log writer.

I want to be able to keep using the Log facade.

In my search I have stumbled upon http://laravel.io/forum/02-11-2014-howto-log-with-mongodb, so I have an idea on how to implement this, but the forum post is written for Laravel 4. In Laravel 5 there is no app/start/global.php anymore and I am searching for the proper place for this code.

Is this something you should do as middleware?

Answer 1

Take a look at Illuminate\Foundation\Bootstrap\ConfigureLogging. This is where logging gets setup.

Specifically the registerLogger() method. Notice how it sets up $app['log']:

$app->instance('log', $log = new Writer(
    new Monolog($app->environment()), $app['events'])
);

So what I would do is edit your AppServiceProvider (or create a new LogServiceProvider, your preference) and overwrite this.

$app->instance('log', new \Illuminate\Log\Writer(
    new Monolog\Logger(... however you want to setup Monolog ...)
);

The Log facade simply accesses $app['log']. So once you've overridden that, you're all set.