What is the correct way to use mode_rewrite?

Question

Apache HTTP Server

Good day
I need to replace URLs like where site.com/...the site.com/city/...city value is set in the cookie, I know how you can change the URL in .htaccess for the user, but how to make the logic

if ($_COOKIE['CITY']=1)
{...} 
elseif 
($_COOKIE['CITY']=2)
{...}...

I don’t understand, is it possible to use conditions somehow in .htaccess or to change the URL in the same way through php?

Answer 1

RewriteEngine on

RewriteCond %{REQUEST_URI} ^/$
RewriteCond %{HTTP_COOKIE} cookie_name=([^;]+) [NC]
RewriteRule ^(.*)$ http://site.com/%1 [L,R=301]