Setup database connection for Eloquent outside of Laravel.

connection.php

<?php // Namespace DB;

use Illuminate\Database\Capsule\Manager as Capsule;

class Connection {

  public function __construct()
  {
    $this->capsule = new Capsule;
    // Same as database configuration file of Laravel.
    $this->capsule->addConnection([
      'driver'   => 'sqlite',
      'database' => __DIR__.'/database.sqlite',
      'prefix'   => '',
    ], 'default');

    $this->capsule->bootEloquent();
    $this->capsule->setAsGlobal();

    // Hold a reference to established connection just in case.
    $this->connection = $this->capsule->getConnection('default');
  }

}