1. Go to this page and download the library: Download adrianodemoura/select2 library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
adrianodemoura / select2 example snippets
class AppController extends Controller {
public $helpers = ['Form', 'Html', 'Js', 'Time', 'Select2.S2Form'];