I have set up a docker container with php + nginx. I made a change to the nginx config so that it redirects to index.php in the root folder if it does not find any file or directory. It started looping adding /index.php/ to the url infinitely. I changed the config back to:

server {
    listen 0.0.0.0:80;
    root /var/www/html;
    location / {
        index index.php index.html;
    }
    location ~ .php$ {
        include fastcgi_params;
        fastcgi_pass php:9000;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root/$fastcgi_script_name;
    }
}

And now it only redirects once, to localhost/index.php/.

I dont think its my poorly built php routers fault as when I remove that code it continues to redirect.
Here is the routers code from index.php anyway:

<?php
    $reqParsed = parse_url($SERVER['REQUESTURI']);
    $viewsDir = '/static/views/';

    $manifest = jsondecode(fileget_contents(__DIR . '/v1/manifest.json'), true);

    switch ($reqParsed['path']) {
        case '':
        case '/':
            require __DIR . $viewsDir . 'home.php';
            break;

        case '/posts/':
            if (isset($_GET['id'])) {
                if (isset($manifest['posts'][$GET['id']])) {
                    require DIR . $viewsDir . 'posts/post-view.php';
                }else {
                    require DIR . $viewsDir . 'posts/post-404.php';
                }
            }else{
                require _DIR . $viewsDir . 'posts/posts.php';
            }
            echo $GET['id'];
            break;

        default:
            httpresponse_code(404);
            require __DIR . $viewsDir . '404.php';
    }
?>

Thanks for any help in advance!