How to make database query inside a config file?

Question

I am struggling to figure out how I can make a database query inside of a Laravel config file.

I currently use:

Answer 1

Leave a default or null value in your config/database.php file. Create a new service provider (either with the artisan command or manually)

php artisan make:provider DatabaseConfigProvider

Then add the new provider to the $providers array in your config/app.php file.

Finally add the following code to the boot() method.

public function boot()
{
    $result= \DB::select('select version() as version')[0];
    $this->app['config']->put('database.connections.mysql.version', $result->version);
}

The key in the put() argument can be whatever you want.