Wordpress pagination with bootstrap pagination design

wp-pagination.php

<?php
/**
* Wordpress pagination
* paginate_links
* https://codex.wordpress.org/Function_Reference/paginate_links
*/

function wp_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;
        }
    }
}