How use Laravel Language Translation in controller as constant? [duplicate]

Question

Is it possible to use Laravel Language Translator (Localization) in controller as constant? Below attempt, example that does not work:

class SearchApproval extends Controller
{
    private $request;

    const stage_1 = Lang::get('message.failed');

Answer 1

trans it's a global function, so you can use it directly from your controller

trans('messages.failed');

but this won't work as constant, so you can use it like this:

class SearchApproval extends Controller
{
    private $request;

    const stage_1 = 'message.failed';

    public function xxx(){
        $whatever = trans(self::stage_1);
    }
}

UPDATED:

You can use this __('Your Text') inside the controller.

Answer 2

Use trans('message.failed') instead of Lang::get('message.failed') https://laravel.com/docs/5.5/helpers#method-trans