How to strip part of URL from URL using htaccess?

Question

htaccess

Greetings.
There are pages like site.ru/cat1/cat2/art.htm?fb_comment_id=12345&start=2 And the numbers in the segment id=12345 are always different.
I don’t understand how to cut out the fb_comment_id=123456789& part using htaccess to get pages like site.ru/cat1/cat2/article.html?start=2
I tried this:

RewriteCond %{QUERY_STRING} ^fb_comment_id= [NC]
RewriteRule (.*) $1? [R=301,L]

All that I did was to completely remove all the signs after the question mark, but not to cut out this particular segment.

Answer 1

if you need to list numbers
If you need to transfer some of the elements from the conda to the steering wheel
Use brackets to select (patern1)(patern2)
a in the steering wheel instead of $1 $2 use %1 %2 (bucks will remain for the steering wheel itself)
Example:

#RewriteCond %{HTTP_HOST} ^www\.(.*) [NC]
   # Проверяем, содержит ли домен www (в начале URL).
#RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

If you need to clearly

# 301 --- http://site.ru/cat1/cat2/art.htm?fb_comment_id=12345&start=2  => http://site.ru/cat1/cat2/article.html?start=2
RewriteCond %{QUERY_STRING} (^|&)fb_comment_id\=12345($|&)
RewriteCond %{QUERY_STRING} (^|&)start\=2 ($|&)
RewriteRule ^cat1/cat2/art\.htm$ /cat1/cat2/article.html?start=2 [L,R=301]