app.php

<?php

use Symfony\Component\Dotenv\Dotenv;
use Symfony\Component\HttpFoundation\Request;

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

$envFile = __DIR__ . '/../.env';
if (file_exists($envFile)) {
    (new Dotenv())->load($envFile);
}

$kernel = new AppKernel('prod', false);
//$kernel = new AppCache($kernel);

// When using the HttpCache, you need to call the method in your front controller instead of relying on the configuration parameter
//Request::enableHttpMethodParameterOverride();
$request = Request::createFromGlobals();

/* In case your app is running behind a reverse-proxy/load-balancer set an environment variable TRUSTED_PROXY_IPS
   defining IPs or IP ranges as a comma list (example : TRUSTED_PROXY_IPS="10.0.0.0/8")
   to allow usage of X-Forwarded-* headers
   This also allows keeping the HTTPS protocol for any URL generated in the PIM */
$loadBalancerTrustedIPs = getenv('TRUSTED_PROXY_IPS');
if (!empty($loadBalancerTrustedIPs)) {
    $ipsArray = explode(',', $loadBalancerTrustedIPs);
    Request::setTrustedProxies(
        // the IP address (or range) of your proxy
        $ipsArray,
        // trust *all* "X-Forwarded-*" headers
        Request::HEADER_X_FORWARDED_ALL
        // or, if your proxy instead uses the "Forwarded" header
        // Request::HEADER_FORWARDED
        // or, if you're using AWS ELB
        // Request::HEADER_X_FORWARDED_AWS_ELB
    );
}

$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);