WP Pagination Bootstrap

// Pagination for paged posts, Page 1, Page 2, Page 3, with Next and Previous Links, No plugin
function thunderwp_pagination()
{
     global $wp_query;
    $big = 999999999;
    $pages = paginate_links(array(
        'base' => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ),
        'format' => '?page=%#%',
        'current' => max(1, get_query_var('paged')),
        'total' => $wp_query->max_num_pages, 
        'type' => 'array',
        'prev_next' => TRUE,
        'prev_text' => '← Previous',
        'next_text' => 'Next →',
            ));
    if (is_array($pages)) {
        $current_page = ( get_query_var('paged') == 0 ) ? 1 : get_query_var('paged');
        echo '<ul class="pagination">';
        foreach ($pages as $i => $page) {
            if ($current_page == 1 && $i == 0) {
                echo "<li class='active'>$page</li>";
            } else {
                if ($current_page != 1 && $current_page == $i) {
                    echo "<li class='active'>$page</li>";
                } else {
                    echo "<li>$page</li>";
                }
            }
        }
        echo '</ul>';
    }
}



Output:
------

<div class="container text-center">
	<div class="row">
		<div class="col-md-12"> 
			<div class="pagination">
			  <?php thunderwp_pagination(); ?>
			</div> 
		</div>
	</div>
</div>