使整个Laravel 5.2应用程序可以访问变量

Question

I'm currently developing a Web Application using Laravel 5.2, in the database I have some configurations saved, I use that Settings along a lot of controllers in the application, so I don't want to be consulting over and over again the same thing. I want to consult it only on application boot, and it this way also reduce the code and no be repetitive. I read this but it seems like are old answers to old versions of the framework. So, In Laravel 5.2 how can I do it?

Answer 1

In the given link in your question, there the answers were given for Laravel 4.x and if you want to implement the same technique in version 5.2 and later then you can use a global middleware. To do that, just create a middleware from your terminal using something like the following:

php artisan make:middleware GlobalConfigMiddleware

This'll create a middleware (GlobalConfigMiddleware.php) in your app/Http/Middleware directory. In this file, all you need to implement the logic for setting up the config within the handle method which should look something like the following:

public function handle($request, Closure $next)
{
    // Pseudo Code
    app()->singleton('site_settings', function($app) {
        // Imagine you have the Setting Eloquent Model
        // Get all settings using the Setting model
        return \App\Setting::all();
    });

    // If you use this line of code then it'll be available in any view
    // as $site_settings but you may also use app('site_settings') as well
    view()->share('site_settings', app('site_settings'));

    return $next($request);
}

Then, add this middleware class in the $middleware property of your app/Http/Kernel.php class, for example:

protected $middleware = [
    // ...
    \App\Http\Middleware\GlobalConfigMiddleware::class,
];

Now, you can use the config like this:

$site_settings = app('site_settings');

Learn about Middleware and Binding. Also remember that, this could be done in different ways.