This sample should help to reproduces an issue with frankenphp/caddy. On sending request data to PHP, it's truncated somewhere.

I'm just using frankenphp for a simple Symfony-based API application. One of these REST endpoints receives larger JSON data as POST request.

Unfortunately the 3964. and all following characters are truncated from the php://input which results into an invalid JSON string.

By using the Symfony CLI web-server / php -s I don't see that strange behavior. I ported the application from Nginx/PHP-FPM to frankenphp. The previous setup works as expected, too.

So, not sure, if this is a issue in caddy and/or frankenphp implementation or some strange configuration fuckup.

dunglas/frankenphp#182

• Dockerfile to build frankenphp/php container
• Caddyfile simplest possible setup for frankenphp
• docker-compose.yml start a simple test environment
• public/index.php simple php script just to receive request data and deserializes json data to an array
• test.sh send request.json via curl to server to demonstrate that issue

docker compose build

./test.sh

It's broken...

NOW: Remove exactly ONE character in request.json and re-run ./test.sh - it's working!