Regardless of my message, the bot would write the template first. How?

Question

PHP

Let's say this is some kind of bot that communicates with you only in private messages and using what method can you make it so that, regardless of the user's message, the bot first displays a template like "Alexander handsome really" and only after this template the bot would start reading commands and answer hello, etc.

Probably a lot of water, I'll tell you with an example:

(User): Hello bot
(Bot): Alexander handsome really
(User): Hello bot
(Bot): Hello, how are you?

For more details please, if not difficult. I'm just a teapot. Thanks for understanding.

Answer 1

ideone.com/vZu3nF
ideone.com/f1k5BQ

Answer 2

As an option to get started.