Nginx rewrite rule for CodeIgniter

Question

Here is the rule in English:

Any HTTP request other than those for index.php, assets folder, files folder and robots.txt is treated as a request for your

Answer 1

You want to do this instead:

if ($request_uri !~ ^/(index\.php|assets|files|robots\.txt)) {
    rewrite ^/(.*)$ /index.php/$1 last;
}

$request_uri is for the original URI request by the client. If you want the URI request AFTER other Nginx rewrite rules have processed it then you would use $uri. However, for what you are trying to do the prior would be the one you would want.

Also, you need to escape special regular expression characters like . by using a backslash.