# FrankenPHP  beta

PHP

> **Caution**
>
> FrankenPHP support is in beta and not yet feature-complete.

[FrankenPHP](https://frankenphp.dev/) is a modern application server for PHP built on top of the [Caddy](https://caddyserver.com/) webserver

## Requirements

- [PHP Probe](../../up-and-running/update) >= `v2026.8.4`

## Coverage

- [Deterministic Profiling](../../monitoring-cookbooks/index): Fully supported.
- [Monitoring](../../monitoring-cookbooks/index): Supported, with Automatic Profiling.
- [Continuous Profiling](../../continuous-profiling-cookbooks/index): Supported via the Datadog extension on ZTS builds.
- [Browser Monitoring](../../front-end-observability/browser-monitoring): Fully supported

## Manual Installation

FrankenPHP requires a ZTS (Zend Thread Safety) build of the Blackfire PHP Probe, which you can install by following our [installation guides](../../up-and-running/installation).

## Docker

Alternatively, you can use the FrankenPHP base Docker image:

```text
FROM dunglas/frankenphp

RUN version=$(php -r "echo PHP_MAJOR_VERSION.PHP_MINOR_VERSION.'-zts';") \
&& architecture=$(uname -m) \
&& curl -A "Docker" -o /tmp/blackfire-probe.tar.gz -D - -L -s https://blackfire.io/api/v1/releases/probe/php/linux/$architecture/$version \
&& mkdir -p /tmp/blackfire \
&& tar zxpf /tmp/blackfire-probe.tar.gz -C /tmp/blackfire \
&& mv /tmp/blackfire/blackfire-*.so $(php -r "echo ini_get ('extension_dir');")/blackfire.so \
# blackfire.agent_socket=tcp://blackfire:8307 is only required if you're using our agent in another container.
&& printf "extension=blackfire.so\nblackfire.agent_socket=tcp://blackfire:8307" > $PHP_INI_DIR/conf.d/blackfire.ini \
&& rm -rf /tmp/blackfire /tmp/blackfire-probe.tar.gz
```

## Support

[Watching for files mode](https://frankenphp.dev/docs/config/#watching-for-file-changes) isn't supported yet.

[Hot Reloading](https://frankenphp.dev/docs/hot-reload/) isn't supported yet.

## Report an issue

FrankenPHP support is still in beta. If you run into a problem, please [open a ticket on the Blackfire support site](https://support.blackfire.io).