How to use Laravel Facades outside of its structure?

Question

I am trying to use some classes of the "Laravel structure" in other files, but I am not succeeding.

For example: I created a file public/teste.php with the following code:

require __DIR__.'/../bootstrap/autoload.php';

use Illuminate\Support\Facades\DB as DB;

$dbInstance = new DB;

var_dump($dbInstance);

This gives the following return:

Object(Illuminate Support Facades DB)#2 (0) { }

But when I have the following code:

require __DIR__.'/../bootstrap/autoload.php';

use Illuminate\Support\Facades\DB as DB;

$dbInstance = new DB;

var_dump($dbInstance);

$pessoas = DB::table("pessoas")->get();

var_dump($pessoas);

Gives the following result:

 Fatal error: Uncaught exception 'RuntimeException' with message 'A facade root has not been set.' in C:\wamp\www\PROJETO\vendor\laravel\framework\src\Illuminate\Support\Facades\Facade.php:210 
 Stack trace: 
 #0 C:\wamp\www\PROJETO\public\teste.php(11): Illuminate\Support\Facades\Facade::__callStatic('table', Array) 
 #1 C:\wamp\www\PROJETO\public\teste.php(11): Illuminate\Support\Facades\DB::table('pessoas') 
 #2 {main} thrown in C:\wamp\www\PROJETO\vendor\laravel\framework\src\Illuminate\Support\Facades\Facade.php on line 210

Does anyone have any idea where I’m going wrong?

I would also like to use my Model.

Answer 1

It’s not that simple, Anderson. Laravel like any other framework usually needs to be initialized, as there are many other things that need to be running before using the classes themselves.

In the case of Laravel we have Dependency Injection, Providers that call the files Routes, Middlewares, etc.

To better understand how Laravel is initiated, read the next page of the documentation that talks about the life cycle of the request.

In short, no need to reinvent the wheel. Understand and create your application from the structure of Laravel.

If you only want to use a separate Laravel component, such as database, it is possible to use the Illuminate sub-modules. See the instructions for use taken from the repository:

<?php

// Mudar aqui para o autoloader do composer
require 'vendor/autoload.php'

use Illuminate\Database\Capsule\Manager as Capsule;

$capsule = new Capsule;

$capsule->addConnection([
    'driver'    => 'mysql',
    'host'      => 'localhost',
    'database'  => 'database',
    'username'  => 'root',
    'password'  => 'password',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
]);

// Set the event dispatcher used by Eloquent models... (optional)
use Illuminate\Events\Dispatcher;
use Illuminate\Container\Container;
$capsule->setEventDispatcher(new Dispatcher(new Container));

// Make this Capsule instance available globally via static methods... (optional)
$capsule->setAsGlobal();

// Setup the Eloquent ORM... (optional; unless you've used setEventDispatcher())
$capsule->bootEloquent();

From there, you can use differently the DB:: and their Models in Eloquent.

Note: That nay enables the use of Facades. Using them outside the framework is not possible because there are other integrations that need to be followed.