htaccess for codeigniter 3

Options -Indexes
Options +FollowSymLinks

# Set the default file for indexes
DirectoryIndex index.php

<IfModule mod_rewrite.c>

    # activate URL rewriting
    RewriteEngine on

    # do not rewrite links to the documentation, assets and public files
    RewriteCond $1 !^(index\.php|public|robots\.txt)

    # do not rewrite for php files in the document root, robots.txt or the maintenance page
    RewriteCond $1 !^([^\..]+\.php|robots\.txt|sitemap\.xml)

    # but rewrite everything else
    RewriteRule ^(.*)$ index.php?/$1 [L]

</IfModule>

<IfModule !mod_rewrite.c>

    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.

    ErrorDocument 404 index.php

</IfModule>