How to use thid party?

Hi people. I was looking for a "link preview", https://github.com/kasp3r/link-preview . I was thinking that I can insert that in third_party, and call all by a custom library, but it is the first time for me.

So, I downloaded all and inserted the files here: application/third_party/LinkPreview/...

My question is: how can I use it now? I created a class like that:

PHP Code:

if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class linkPreview {
    public function __construct()
    {
        require_once APPPATH.'third_party/LinkPreview/LinkPreview.php';
    }
    
    public function link(){
        $var = new LinkPreview("http://facebook.com");
        return $var;
    }
} 


but if in a controller I include the library

PHP Code:

$this->load->library('linkPreview') 


and then I call in this way:

PHP Code:

$this->linkPreview->link() 


I've this errors:


Can you give me some ideas?

Thank you!