Question on nginx and codeigniter, how to remove index.php?

Question

Nginx

The personal account on codeigniter 2 is located in the ti directory on the site, for example https://site.ru/ti/
There was a setting to remove index.php from the URL, the conditions were written in .htaccess

# BEGIN HTTPS Redirection Plugin
#<IfModule mod_rewrite.c>
#RewriteEngine On
#RewriteCond %{HTTPS} off
#RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
#</IfModule>
# END HTTPS Redirection Plugin

<IfModule mod_rewrite.c>

    Options +FollowSymLinks
    RewriteEngine on

    # Send request via index.php
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?$1 [L]

</IfModule>

Now we are moving to nginx, respectively, the .htaccess file does not work, how to rewrite it under the nginx config? Thanks in advance!