Laravel log - single file or files by date?

Laravel logging mechanism is pretty simple - it writes all the errors to a file at /storage/logs/laravel.log. It's convenient until the file gets bigger. And then you have a problem to find a bug from yesterday or some days ago. How can you solve this? Basically, the real problem looks like this: you SSH to your server, go to /storage/logs folder and run ls -l command for the files list with information. And see this:

-rw-rw-r-- 1 forge forge 31580639 Jul  4 07:52 laravel.log

True story from one of my projects - laravel.log file is 31 MB. It's pretty difficult to find anything there, if a client reports that "unknown bug" happened to him a few days ago. Luckily, it's really easy to change - it's only one setting in config/app.php file:

    /*
    |--------------------------------------------------------------------------
    | Logging Configuration
    |--------------------------------------------------------------------------
    |
    | Here you may configure the log settings for your application. Out of
    | the box, Laravel uses the Monolog PHP logging library. This gives
    | you a variety of powerful log handlers / formatters to utilize.
    |
    | Available Settings: "single", "daily", "syslog", "errorlog"
    |
    */

    'log' => env('APP_LOG', 'single'),

As you can see, by default the value is single file, but you can change it to daily (or others, leaving that for you to explore) - either in the config file itself, or in environment file .env. When you change the setting to daily, instead of one laravel.log - you will get separate file for each date - something like laravel-2016-07-03.log.