控制器中的构造函数如何重写为提供者？

I have this controller to work with MailChimp:

class MailchimpController extends Controller
{
    private $MC_API_KEY;
    private $MailChimp;

    public function __construct()
    {
        $this->CHIMP_KEY = getenv('CHIMP_KEY');
        $this->MailChimp = new MailChimp($this->CHIMP_KEY);
    }

    public function index()
    {
        return $this->MailChimp->get('test');
    }

    public function show($test)
    {
        return $this->MailChimp->get("test/$test");
    }
}

How do I rewrite this constructor to service provider?

Provider@register:

Lets not deal with the 'env' and pull that from the config (for caching reasons).

$this->app->bind(MailChimp::class, function ($app) {
    return new MailChimp($app['config']['services']['mailchimp']['key']);
});

Controller constructor:

public function __construct(MailChimp $mailchimp) {
    $this->mailchimp = $mailchimp;
}

For a facade you 'could try' to just use a Real-time Facade.

use Facades\SomeNamespace\MailChimp as MailChimp;

public function blah()
{
    MailChimp::get(...);
}

In app/Providers/AppServiceProvider.php in register() bind class to service container:

$this->app->bind(MailChimp::class, function () {
    return new MailChimp(getenv('CHIMP_KEY'));
});

Now in your controller you have 2 options:

First is to resolve it via app helper:

public function __construct()
{
    $this->MailChimp = app(MailChimp::class);
}

Or use dependency injection:

public function __construct(MailChimp $mailchimp)
{
    $this->MailChimp = $mailchimp;
}