tg-bot

If you know, you know

src/entryPoint.php is the main entry-point function. It will look through all registered implementations of MessageHandler and take the first one that successfully handled the message. Register new message handler here.
src/MessageHandler.php is the abstract class for message handlers. It has a pre-implemented functions to send responses.
src/repl.php is a REPL to send test messages to the entryPoint, intended for quick tests, using PHP CLI.
test/ is for PHPUnit tests. It is quite empty atm and only contain a placeholder.