How to remove slashes at the end of the URL and duplicate slashes if there are any in the middle through .htaccess?

Question

htaccess

Hello, I can not figure out how to remove the slashes at the end of the url.
The site works through the front controller, all requests are sent to index.php
Now .htaccess looks like this:

AddDefaultCharset utf-8

RewriteEngine on
RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^(.*)$ index.php

How to fix it so that if there is a slash at the end, it will redirect to the same URL without a slash at the end, or if
someone enters additional slashes in the middle, only 1 remains

Answer 1

AddDefaultCharset utf-8

RewriteEngine on
RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ /$1 [R=301,L]

RewriteCond %{THE_REQUEST} ^[^?]+//
RewriteRule ^(.*)$ /$1 [R=301,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^(.*)$ index.php [L]