mod rewrite is not working and not giving any error - regex

Question

We want to change links "www.example.com/page/login/" to "www.example.com/sayfa/giris". I tried this: RewriteRule ^page/^(.+[^/])$/ /sayfa/^(.+[^/])$ [L] But nothing is change. Is there any error?
Thank you very much for your response #geert3 and #anubhava. But all trying failed. Here is my .htaccess content:
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} ^(.*)/{2,}(.*)$
RewriteRule . %1/%2 [R=301,L]
RewriteCond %{REQUEST_URI} /+[^\.]+$
RewriteRule ^(.+[^/])$ %{REQUEST_URI}/ [R=301,L]
RewriteRule /(uploads/.*) $1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ page.php?url=$1 [QSA,L]

Answer 1

You can use this code in your DOCUMENT_ROOT/.htaccess file:
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} ^(.*)/{2,}(.*)$
RewriteRule . %1/%2 [R=301,L]
RewriteCond %{REQUEST_URI} /+[^\.]+$
RewriteRule ^(.+[^/])$ %{REQUEST_URI}/ [R=301,L]
RewriteRule /(uploads/.*) $1 [R=301,L]
RewriteRule ^sayfa/giris/?$ /page/login [L,NC]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ page.php?url=$1 [QSA,L]
Make sure there is not .htaccess in /sayfa/ folder.

Answer 2

I think you need to remove the second ^ and add an initial slash after the first ^. The slash after $ must be removed.
^/page/(.+[^/])$
^ at the start of an expression means "beginning of line" (i.e. in your case you want /page in front of the path). After a square bracket it means "none of the listed characters" (i.e. in your case no slash). In other places, it makes no sense.
$ means "end of line" so it makes no sense to add stuff after it.
Also as #Croises noted, you can't have "matches" on the right. Right side is your target URL, so there you can either re-use matches you made on the left side, use environment variables or hardcoded text, but no new matches. So no ^, [], $ etc.
So for instance the whole rule would become:
^/page/(.+[^/])$ /sayfa/giris [L]