FrankenPHP support is in beta and not yet feature-complete.
FrankenPHP is a modern application server for PHP built on top of the Caddy webserver
FrankenPHP requires a ZTS (Zend Thread Safety) build of the Blackfire PHP Probe, which you can install by following our installation guides.
Alternatively, you can use the FrankenPHP base Docker image:
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FrankenPHP support is still in beta. If you run into a problem, please open a ticket on the Blackfire support site.