// Хранение глобальных настроек сайта на laravel в БД

// 1. миграция
<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateSettingsTable extends Migration
{
    public function up()
    {
        Schema::create('settings', function (Blueprint $table) {
            $table->string('key')->primary();
            $table->string('value');
            $table->string('default');
            $table->enum('type', ['integer', 'money', 'string']);
            $table->string('description');
        });
    }

    public function down()
    {
        Schema::dropIfExists('settings');
    }
}



//------------------------
// 2. Модель
<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

/**
 * App\Setting
 *
 * @method static \Illuminate\Database\Eloquent\Builder|\App\Setting newModelQuery()
 * @method static \Illuminate\Database\Eloquent\Builder|\App\Setting newQuery()
 * @method static \Illuminate\Database\Eloquent\Builder|\App\Setting query()
 * @mixin \Eloquent
 */
class Setting extends Model
{
    protected $primaryKey = 'key';
    public $incrementing = false;
    public $timestamps = false;
    protected $keyType = 'string';

    protected $fillable = ['key', 'value'];
}
//-----------------------------
// 3. Сервис-провайдер
<?php

namespace App\Providers;

use App\Setting;
use Illuminate\Support\ServiceProvider;

class SettingsServiceProvider extends ServiceProvider
{

    public function boot()
    {
        //
    }

    public function register()
    {
        $this->app->singleton('settings', function ($app) {
            $settings = [];
            foreach (Setting::all() as $setting) {
                switch ($setting->type) {
                    case 'integer':
                        $settings[$setting->key] = (integer)$setting->value ? (integer)$setting->value : (integer)$setting->default;
                        break;
                    case 'money':
                        $settings[$setting->key] = (float)round($setting->value, 2) ? (float)round($setting->value, 2) : (float)round($setting->default, 2);
                        break;
                    default:
                        $settings[$setting->key] = (string)$setting->value ? (string)$setting->value : (string)$setting->default;
                }
            }
            return $settings;
        });
    }
}
//-------------------------


// 4. зарегистрировать SettingsServiceProvider  провайдер
config/app.php


//--------------------------
// 5. в composer.json
 "autoload": {
        "files": [
            "app/Helpers/helpers.php"
        ],


// 6. создаем свой хелпер ----------------
// файл /app/Helpers/helpers.php 

<?php

use Illuminate\Support\Arr;

function setting($key)
{
    return Arr::get(app('settings'), $key);
}

// 7. после создания файла выполнить composer dump-autoload

// 8. получить значение:
// где угодно вызываешь 
setting('some_key')