RewriteRule for CNC does not work correctly. Guys who knows the answer?

Question

PHP

Hello everyone, just now I was checking the operation of the rule for auto changing the url through the .htaccess file

. For some reason, it does not work on the hosting. All I need is to change the link like this:
sait.ru/r1/index_feed.php?id=9
TO
sait.ru/r1/post/9.html
The rule was written like this:
RewriteEngine on
RewriteRule ^post/([-a-z0 -9]+.html)$ index_feed.php?id=$1 [L]
Tell me guys who knows why it doesn't work?

Answer 1

Curve regular. The point needs to be screened. (\.)

Answer 2

And I thought that ?id=9 is a get request.
and that = google.ru "redirect with get request"