regex - Mod rewrite everything except specific subfolder -

i'm trying redirect except subfolders admin , api admin, so:

/           - redirects /admin /some-url   - redirects /admin /admin      - doesn't redirect /admin/1    - doesn't redirect /api        - doesn't redirect /api/v1/etc - doesn't redirect 

but i've got far doesn't redirect correctly. here's mod_rewrite:

<ifmodule mod_rewrite.c>   rewriteengine on    rewritecond %{request_uri} !^/(admin|api)   rewriterule ^ /admin [r,l]    rewritecond %{request_filename} !-f   rewritecond %{request_filename} !-d   rewritecond %{request_uri} !=/favicon.ico   rewriterule ^ ./index.php [l]  </ifmodule> 

you should use the_request variable instead of request_uri request_uri changes value due last rule , in next iteration of mod_rewrite rewrite condition in first rule returns true.

<ifmodule mod_rewrite.c>   rewriteengine on    rewritecond %{the_request} !/(admin|api) [nc]   rewriterule ^ /admin [r,l]    rewritecond %{request_filename} !-f   rewritecond %{request_filename} !-d   rewritecond %{request_uri} !=/favicon.ico   rewriterule ^ ./index.php [l]  </ifmodule>