working htaccess for titer 3 on local xampp

Thank you

I'm wondering why the official CodeIgniter guide is missing this point

The guide is the basic of the basic, so looks intended mainly for newbies

If it is, this piece of code and also a HUGE WARNING are missing.

I have been stuck on this for hours and hours 

This would//could make many to abandon the official tutorial and maybe CI too.

P.S. How does htaccess will change when the CI from a subdir level, is moved to root?

- root of xampp test environment 
- root of a general purpose webhosting with a FQD an again Apache as webserver engine


(better to ask now instead to as later in a new thred)

Thank you