We just saw how we can programmatically use existing tokens inside our strings and get them replaced with minimal effort. All we need is the token service and the data object that can be used to replace the token. Keep in mind that there are tokens which don't even require any data objects due to their global nature. The hook_tokens() implementation will take care of that--let's see how.
In the preceding chapter, we created functionalities for a dynamic "Hello World" message, which are either calculated or loaded from a configuration object. How about we expose the message to a token? This would make its usage more flexible because our string becomes exposed to the entire token system.
As mentioned, we will start with ...
