unlimited parameters get last one - php

Question

I'm using codeigniter. How can I get last part of my URL like:
www.example.com/uk-en/category/subcategory
Parameters may be unlimited or there may be only one. Inside of my Controller Home and method Index, I just want last part of url e.g "subcategory"
if url is www.example.com/uk-en/category I want "category"
if url is www.example.com/uk-en I want "uk-en"
Edit
if url is www.example.com/Home/index/uk-en/category then it's working
but What i want without class name "Home" and method "index"
Like this www.example.com/uk-en/category
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Home extends CI_Controller{
public function index($params=[]){
$params=func_get_args();
$last=end($params);
echo $last;
}
}
?>
routes.php
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
$route['(:any)'] = 'Home/index';
$route['default_controller'] = 'Home';
$route['404_override'] = 'error_404/index';
$route['translate_uri_dashes'] = FALSE;
?>
.htaccess
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [QSA,L]

Answer 1

Use this in your routs
$route['(.*)'] = "Home/index";
This to print all routs in your controller in your index function
print_r($this->uri->segment_array());

Answer 2

Problem in your routes is with setting wildcard placeholder on first place. It always need to be at last place.
Routes will run in the order they are defined. Higher routes will always take precedence over lower ones.
$route['default_controller'] = 'Home';
$route['404_override'] = 'error_404/index';
$route['translate_uri_dashes'] = FALSE;
//some example routes
$route['specific/route'] = 'controller/method';
$route['specific/(:num)'] = 'page/show/$1';
//always put your wildcard route at the end of routes.php file
$route['(:any)'] = 'home/index';
Docs.