How to use external php library in codeigniter?

Hey! 

I'm currently creating a project where users can compare two text files (html styled or not), see the differences between those two and then request for embeding those changes in the main file (something like GitHub but without all this fuss of using commands to push changes).

What i found is this library:

Caxy/HtmlDiff/HtmlDiff

I placed the "Caxy" folder inside "libraries" folder of my project and what i get after autoloading the library is:

Autoload.php

PHP Code:

$autoload['libraries'] = array(
    'caxy/htmldiff/htmldiff'
); 


View file

Code:

Fatal error: Class 'Caxy\HtmlDiff\AbstractDiff' not found in "path/path/path/......" on line 10

When on the other hand, i try to use it like this:

PHP Code:

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

use Caxy\HtmlDiff\HtmlDiff;

class Files extends CI_Controller {
    
   public function index(){

   }
} 


 i get this

PHP Code:

An uncaught Exception was encountered
Type: Error

Message: Class 'Caxy\HtmlDiff\HtmlDiff' not found

Filename: ...\application\controllers\Files.php 


After searching online i didn't find any solid answer on this issue..

Any ideas or suggestions? 

Thanks!

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