How to write a chat bot for Telegram?

Question

PHP

Hello.
Please help. I want to write a dialog bot for Telegram.
Now it certainly works, but not as we would like :(
Example:

User: Art123456
Bot: Looking for SKU 123456
Bot: Found <information about the product with this SKU>

User: NameTEST
Bot: Looking for a product with the name TEST
Bot: Found <information about a product with this name>

Made according to the principle

...
switch (mb_substr($text,0,3)) {
            case 'Арт':
...

And I really want to do a search like this:

User: Article
Bot: Search mode by article, send it
User: 123456
Bot: Found the following for article 123456 ...

Throw a link at me :)

Answer 1

you are looking for a product by a search query, this query is 123456
UPD: I misunderstood the question. You need to create a command like /search_by_articul and call it if the user has typed the word "Article"

Answer 2

And what prevents you from using the / article 123456 command? Display buttons with search directions, when pressed, a command is added and it remains only to specify and send the value.

Answer 3

You need to create a table in the database: user_context (id, user_id, context), the current user context is written in the context field (for example, choose_articul). Further, depending on the current context, call the necessary methods.