Bootstrap Pagination for WordPress

bootstrap-pagination.php

<?php
  /*
   * custom pagination with bootstrap .pagination class
   * source: http://www.ordinarycoder.com/paginate_links-class-ul-li-bootstrap/
   */

  function bootstrap_pagination( $custom_query = null, $echo = true ) {
    global $wp_query;

    $pagination = '';

    $wpQuery = $custom_query ? $custom_query : $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' => $wpQuery -> max_num_pages,
        'type'  => 'array',
        'prev_next'   => true,
        'prev_text'    => __('&laquo; Prev'),
        'next_text'    => __('Next &raquo;'),
      ) );


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

      $pagination = '<ul class="pagination">';

      foreach ( $pages as $page ) {

        if ((strpos($page, 'prev') !== false) || strpos($page, 'next') !== false) {

          $pieces = explode(" ", $page);
          $pieces[1] = ' class="prev page-numbers page-link" ';
          $pieces[2] = '';
          $page = implode($pieces);
          $pagination .= "<li class=\"page-item\">$page</li>";

        } elseif (strpos($page, 'current') !== false){

          $pieces = explode(" ", $page);
          $pieces[0] .= ' ';
          $pieces[1] .= ' page-link ';
          $page = implode($pieces);
          $pagination .= "<li class=\"page-item active\">$page</li>";

        } else {

          $pieces = explode(" ", $page);
          $pieces[1] = ' class="prev page-numbers page-link" ';
          $page = implode($pieces);
          $pagination .= "<li class=\"page-item\">$page</li>";

        }

      }

      $pagination .= '</ul>';
    }

    return $pagination;
  }
?>