How to redirect using $this-session-userdata(country_territory)

Don't create functions for every user.
Create one function that accepts the user_id as parameter.

Controller: Adverts.php

PHP Code:

public function create_advert($user)
{
  
} 


To use this function: https://example.com/adverts/create_advert/3
(where 3 is the user_id).

OK, I've created an Adverts Controller and several functions within, but I can see that I have a lot of learning to do.

Throughout the development I've used routes together with <a href="/createadvert">CreateAdvert</a> links rather than url inserts. Can you explain how I would automatically get the user_id within a link?

And before a Users creates an advert I want to give them an option of the advert layout, for example the "Description - Images - Ingredients - Details" to be in different places on the page. Where & how can I achieve that?