How to make a 301 redirect, like on Habré?

Question

htaccess

I'm going to launch one Wordpress project with a link structure:
http://site.ru/category/12345/
And I need to make sure that if something else is added to this address "by mistake", then 301 instead of 404 would work on the same page. Such implementation is used on Habré. example:

http://habrahabr.ru/post/212003/

http://habrahabr.ru/post/212003/ошибочний текст/

How to do it, who knows?

Answer 1

Is there nginx in front of the server? Then you can do it.

Answer 2

And habr does not redirect anywhere.
They simply rewrite in nginx in such a way that it does not take into account the third section of the uri (and beyond).
But if you need a rewrite, then something like this:
location something like this {
...
error 404 = @errorloc
...
}
location @errorloc {
rewrite ^/(.*)/(.*)/.* $scheme:// $http_host/$1/$2 permanent;
}
Approximately so.