CodeIgniter 3.x pagination config for Bootstrap 4

pagination.php

<?php

$config['total_rows'] = 100;
$config['per_page'] = 20;

$config['num_tag_open'] = '<li class="page-item">';
$config['num_tag_close'] = '</li>';
$config['cur_tag_open'] = '<li class="page-item active"> <span class="page-link">';
$config['cur_tag_close'] = '</span> </li>';
$config['attributes'] = array('class' => 'page-link');

$this->pagination->initialize($config);
echo $this->pagination->create_links();


#https://getbootstrap.com/docs/4.0/components/pagination/
#https://www.codeigniter.com/userguide3/libraries/pagination.html