Different URI segments because subfolder?

Hi, I'm using CI 3.0.6 with PHP 7.0.x and my URL is:

Code:

http://xyz.hospedagemdesites.ws/homologacao/index.php

The "/homologacao" is a subfolder. When doing this:

PHP Code:

$this->uri->segment(1) 


I get "homologacao", is that right? Because, it came *before* the front controller index.php...

And on my dev environment, same CI and PHP but at URL:

Code:

http://localhost/xyz/public_html/index.php

When running the same $this->uri->segment(1) I get an empty string, why...?  
Thank you!