Creating a CNC URL with htaccess?

Question

PHP

There is a form on the site, when choosing a city, information for the selected city is displayed.
Select the city MoscowSt. Petersburg
When choosing Moscow, the url is site.ru/index.php?city=moscow
In htaccess I created a
RewriteEngine On
RewriteRule ^([^/]*)\.html$ /index.php?city=$1 [ L]
Now the site works on the url site.ru/moscow.html
But if you manually enter it, tell me how to make it so that when choosing a city, the url is immediately displayed.

Answer 1

Edit php script or make redirects in the same file

Answer 2

where is the screen?

RewriteRule ^([^/]*)\.html$ /index.php\?city=$1 [L]