app.php

Barryvdh\LaravelIdeHelper\IdeHelperServiceProvider::class,

AppServiceProvider.php

public function register()
{
    if ($this->app->environment() !== 'production') {
        $this->app->register(\Barryvdh\LaravelIdeHelper\IdeHelperServiceProvider::class);
    }
    // ...
}

composer.json

"scripts":{
    "post-update-cmd": [
        "Illuminate\\Foundation\\ComposerScripts::postUpdate",
        "php artisan ide-helper:generate",
        "php artisan ide-helper:meta",
        "php artisan optimize"
    ]
},

dbal.sh

$ composer require doctrine/dbal

ide-helper.sh

$ composer require barryvdh/laravel-ide-helper --dev

ide-helper2.sh

$ php artisan ide-helper:generate

ide.sh

$ php artisan ide-helper:models Post