bootstrap pagination for WP

WP-bootstrap-pagination.php

function mr_bootstrap_pagination($echo = true)
{
    global $wp_query;

    $big = 999999999; // need an unlikely integer

    $pages = paginate_links(array(
        'base' => str_replace($big, '%#%', esc_url(get_pagenum_link($big))),
        'format' => '?paged=%#%',
        'current' => max(1, get_query_var('paged')),
        'total' => $wp_query->max_num_pages,
        'type' => 'array',
        'prev_next' => true,
        'prev_text' => __('« Prev'),
        'next_text' => __('Next »'),
    )
    );

    if (is_array($pages)) {
        $paged = (get_query_var('paged') == 0) ? 1 : get_query_var('paged');

        $pagination = '<ul class="pagination justify-content-center">';

        foreach ($pages as $page) {
			$page = preg_replace('|page-numbers|','page-link', $page ); 
			
            $pagination .= '<li class="page-item ' . ( strrpos($page, 'current') ? 'active' :'') . ' ">'.$page.'</li>';
        }

        $pagination .= '</ul>';

        if ($echo) {
            echo $pagination;
        } else {
            return $pagination;
        }
    }
}