Laravel 5.4在重新安装后抛出500错误

Question

资料:

Php version 7.1

安装的所有扩展：

OpenSSL PHP Extension
PDO PHP Extension
Mbstring PHP Extension
Tokenizer PHP Extension
XML PHP Extension

已尝试运行：

composer dump-autoload
composer clear-cache
artisan clear:cache
 artisan config:Cache

错误日志中的错误：

PHP分析错误：语法错误，第50行的/home/username/laravel/public/index.PHP中出现意外的“class”（T_类），需要标识符（T_字符串）或变量（T_变量）或“{”或“$”

访问站点时：HTTP错误500

有什么想法吗？

编辑1：

公共/索引的内容。php

<?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);

?>

我是如何安装laravel的：

通过SSH登录到服务器<代码>光盘/主页/用户名/

// Download composer & install & unistall

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('SHA384', 'composer-setup.php') === '669656bab3166a7aff8a7506b8cb2d1c292f042046c5a994c43155c0be6190fa0355160742ab2e1c88d40d5be660b410') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

// Download laravel

/opt/cpanel/ea-php71/root/usr/bin/php /home/username_here/composer.phar create-project --prefer-dist laravel/laravel

// Create soft link

rm -rf public_html
ln -s laravel/public/ public_html


// Change ownership permissions 

chown -R username_here:username_here /home/username_here/laravel
chown -R username_here:username_here /home/username_here/public_html

// Generate a key 

/opt/cpanel/ea-php71/root/usr/bin/php /home/username_here/laravel/artisan key:generate

服务器使用MultiHP Manager，所以为了使用php版本7.1，我必须使用所选的php版本（/opt/cpanel/ea-php71/root/usr/bin/php）

Answer 1

你的index.php档案有问题

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

在这一行中，您必须用vendor替换此引导，因为laravel 5.6将自动加载文件存储在vendor文件夹中，而不是bootstrap文件夹中

请删除引导并添加供应商，然后运行composer dump autoload命令，然后尝试访问：）

Answer 2

解决方案是与我的主机提供商联系，并将PHP版本更改为

Answer 3

我的是Web服务器使用我的旧PHP版本5.去解决它试试看

sudo a2dismod php5 sudo a2enmod php7。0 sudo服务apache2重新启动