Worker mode (without docker) not working using Symfony ?

[mykiwi]

Hi

I try to use FrankenPHP on a Symfony application (fresh new with the runtime):

symfony new application
cd application
composer req frankenphp
cd -

For information, when I run the normal server, this work fine ✅

$ frankenphp php-server \
  --root ./application/public/ \
  --listen 0.0.0.0:8000

$ curl --head localhost:8000
HTTP/1.1 404 Not Found
Cache-Control: no-cache, private
Content-Type: text/html; charset=UTF-8
Date: Sun, 03 Aug 2025 13:57:00 GMT
Server: Caddy
X-Powered-By: PHP/8.4.10
X-Robots-Tag: noindex

But when I try to use the worker mode, I got some 404 that are not from Symfony 🤔

$ APP_RUNTIME=Runtime\\FrankenPhpSymfony\\Runtime \
frankenphp php-server \
  --worker ./application/public/index.php,4 \
  --listen 0.0.0.0:8000 \
  --debug

$ curl --head localhost:8000
HTTP/1.1 404 Not Found
Server: Caddy
Date: Sat, 02 Aug 2025 23:46:23 GMT

What I'm doing wrong? Is it a bug?

To reproduce it, I'm on the latest version (using nix with devenv)

$ frankenphp version
FrankenPHP 1.9.0 PHP 8.4.10 Caddy v2.10.0 h1:fonubSaQKF1YANl8TXqGcn4IbIRUDdfAkpcsfI/vX5U=

You can try by yourself using my repo: https://github.com/mykiwi/sandbox-frankenphp

[mykiwi]

Did adding --root ... is the solution?

[AlliBalliBaba]

Yeah root should be the public path when just using php-server, since index.php is the default fallback, something like (haven't tried):

frankenphp php-server
--root application/public
--worker application/public/index.php,4
--listen 0.0.0.0:8000
--debug

If you need more fine-grained configuration I suggest using a https://frankenphp.dev/docs/config/#caddyfile-config and doing frankenphp run -c ./Caddyfile