阿里云服务器部署laravel无法访问index.php页

Question

先放一张public文件夹的目录结构图：

购买的是阿里云Linux 的ubuntu 16.x.x 系统
在上面部署laravel项目，配置了访问public文件夹下的index文件，但是为什么 不能访问？
index.php内容：

<?php

/**
 * Laravel - A PHP Framework For Web Artisans
 *
 * @package  Laravel
 * @author   Taylor Otwell <[e-mail]>
 */

/*
|--------------------------------------------------------------------------
| Register The Auto Loader
|--------------------------------------------------------------------------
|
| Composer provides a convenient, automatically generated class loader for
| our application. We just need to utilize it! We'll simply require it
| into the script here so that we don't have to worry about manual
| loading any of our classes later on. It feels great to relax.
|
*/

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

/*
|--------------------------------------------------------------------------
| Turn On The Lights
|--------------------------------------------------------------------------
|
| We need to illuminate PHP development, so let us turn on the lights.
| This bootstraps the framework and gets it ready for use, then it
| will load up this application so that we can run it and send
| the responses back to the browser and delight our users.
|
*/

$app = require_once __DIR__.'/../bootstrap/app.php';

/*
|--------------------------------------------------------------------------
| Run The Application
|--------------------------------------------------------------------------
|
| Once we have the application, we can handle the incoming request
| through the kernel, and send the associated response back to
| the client's browser allowing them to enjoy the creative
| and wonderful application we have prepared for them.
|
*/

$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);

$response = $kernel->handle(
    $request = Illuminate\Http\Request::capture()
);

$response->send();

$kernel->terminate($request, $response);

报错图：

我试着替换了一下index.php的内容，换成这种简单的是可以显示的

但是如果换成自己项目原有的index.php文件就报错了

Answer 1

建议你，
首先打开 php.ini 搜索 display_errors，把 Off 修改为 On，开启 php 错误提示
看看具体报什么错误，再去解决。
比如存在的问题：composer没有安装依赖，目录没有写权限，开启了错误提示，看看错误再说