Php 如何访问应用程序目录之外的数据库

我有一个php文件，它包含在我的Laravel公用文件夹login.php中。 我想从mySql数据库中获取所有使用数据

require_once __DIR__.'/../vendor/autoload.php';
$app = require __DIR__ . '../../bootstrap/app.php';
$app->boot();
$user=new \App\User();
dd(user::all());//get all user details.

运行此操作时，它会返回一条错误消息：

Fatal error: Uncaught Error: Call to a member function connection() on null in C:\inetpub\wwwroot\blog2\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php:1138 Stack trace: #0 C:\inetpub\wwwroot\blog2\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(1104): Illuminate\Database\Eloquent\Model::resolveConnection(NULL) #1 C:\inetpub\wwwroot\blog2\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(936): Illuminate\Database\Eloquent\Model->getConnection() #2 C:\inetpub\wwwroot\blog2\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(847): Illuminate\Database\Eloquent\Model->newBaseQueryBuilder() #3 C:\inetpub\wwwroot\blog2\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(885): Illuminate\Database\Eloquent\Model->newModelQuery() #4 C:\inetpub\wwwroot\blog2\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(836): Illuminate\Database\Eloquent\Model->newQueryWithoutScopes() #5 C:\inetpub\wwwroot\blog2\vendor\laravel\framework\s in C:\inetpub\wwwroot\blog2\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php on line 1138

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如何在此处获取所有用户数据。

Laravel 5.6中的工作解决方案

<?php
require __DIR__.'/../vendor/autoload.php';
$app = require_once __DIR__.'/../bootstrap/app.php';
$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);
$kernel->handle(Illuminate\Http\Request::capture());

$user = \App\User::all()->toArray();

var_dump($user);