The idea of using a branch for broadcasting

Is it difficult to organize the integration of the “Topic” for broadcasting with the installation of code to EMBED on any php site.
Example of such a service

Not sure I follow. You want to embed a list of topics in another website? Is that it?

Yes. To be able to build a theme on any website.
But when generating the embedding, you can choose which users to display on the Website, on the forum to display all messages.
Well, that’s the idea, sorry for my English.