laravel/app/Http/Middleware/TrustProxies.php


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<?php

namespace App\Http\Middleware;

use Illuminate\Http\Request;
use Illuminate\Http\Middleware\TrustProxies as Middleware; // Laravel 9.x+

class TrustProxies extends Middleware
{
    /**
     * The trusted proxies for this application.
     *
     * @var array
     */
    protected $proxies;

    /**
     * The headers that should be used to detect proxies.
     *
     * @var int
     */
    // Laravel 9.x+
    protected $headers =
        Request::HEADER_X_FORWARDED_FOR |
        Request::HEADER_X_FORWARDED_HOST |
        Request::HEADER_X_FORWARDED_PORT |
        Request::HEADER_X_FORWARDED_PROTO |
        Request::HEADER_X_FORWARDED_AWS_ELB;
}