laravel 5.5 升级到laravel 5.7 步骤

修改 composer.json

"fideloper/proxy": "~3.3",
"laravel/framework": "5.5.*",

改为：

"fideloper/proxy": "^4.0",
"laravel/framework": "5.7.*",

执行命令 composer update

修改 app\Http\Middleware\TrustedProxies.php

protected $headers = [
    Request::HEADER_FORWARDED => 'FORWARDED',
    Request::HEADER_X_FORWARDED_FOR => 'X_FORWARDED_FOR',
    Request::HEADER_X_FORWARDED_HOST => 'X_FORWARDED_HOST',
    Request::HEADER_X_FORWARDED_PORT => 'X_FORWARDED_PORT',
    Request::HEADER_X_FORWARDED_PROTO => 'X_FORWARDED_PROTO',
];

改为：

protected $headers = Request::HEADER_X_FORWARDED_ALL;