Accessing Codeigniter folder inside Wordpress directory - wordpress

Question

I have installed Codeigniter into a directory called /portal inside my Wordpress directory. If I visit www.mydomain.com/portal I can see my default controller/view, which is a login page, however if I try to login I get a 404 error in the console for www.mydomain.com/auth/login.
Here's my Wordpress .htaccess
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} ^/portal [NC]
RewriteRule .* - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
And my Codeigniter main .htaccess file
<IfModule mod_rewrite.c>
RewriteEngine on
# Send request via index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>
How do I get this to work?
Codeigniter 3, Wordpress 4.6.3, PHP 7.

Answer 1

You just need to add a question mark after the index.php like so:
RewriteRule ^(.*)$ index.php?/$1 [L]
So the full thing (in your CodeIgniter .htaccess file is like:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>

Answer 2

1) wordpress .htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
2) Codeigniter .htaccess
RewriteEngine on
RewriteCond $1 !^(index\.php|resources|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]
3) And Changed in your config file i.e portal/application/config/config.php - $config['base_url']
$config['base_url'] = '/portal';
It's work for me, you will try this.