更改URL index.php

Question

In codeigniter 3 from git hub, I have tried to use the enable_query_strings but does not do what I am after.

I use index.php but also would like to add index.php?route= so then url would look like http://www.example.com/index.php?route=folder/controller/

But when I add it to my config index_page route does not work $config['index_page'] = 'index.php?route=';

Not work also with

Options +FollowSymlinks
Options -Indexes

<FilesMatch "(?i)((\.tpl|\.ini|\.log|(?<!robots)\.txt))">
 Order deny,allow
 Deny from all
</FilesMatch>

RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !.*\.(ico|gif|jpg|jpeg|png|js|css)
RewriteRule ^([^?]*) index.php?_route_=$1 [L,QSA]

Hoe can i make the $config['index_page'] = 'index.php?route='; work with my url?