Wordpress - pagination

pagination.php

<?php
function pagination() {
    // Don't print empty markup if there's only one page.
    if ( $GLOBALS['wp_query']->max_num_pages < 2 ) {
        return;
    }

    $paged        = get_query_var( 'paged' ) ? intval( get_query_var( 'paged' ) ) : 1;
    $pagenum_link = html_entity_decode( get_pagenum_link() );
    $query_args   = array();
    $url_parts    = explode( '?', $pagenum_link );

    if ( isset( $url_parts[1] ) ) {
        wp_parse_str( $url_parts[1], $query_args );
    }

    $pagenum_link = remove_query_arg( array_keys( $query_args ), $pagenum_link );
    $pagenum_link = trailingslashit( $pagenum_link ) . '%_%';

    $format  = $GLOBALS['wp_rewrite']->using_index_permalinks() && ! strpos( $pagenum_link, 'index.php' ) ? 'index.php/' : '';
    $format .= $GLOBALS['wp_rewrite']->using_permalinks() ? user_trailingslashit( 'page/%#%', 'paged' ) : '?paged=%#%';

    // Set up paginated links.
    $links = paginate_links(array(
        'base'      => $pagenum_link,
        'format'    => $format,
        'total'     => $GLOBALS['wp_query']->max_num_pages,
        'current'   => $paged,
        'mid_size'  => 1,
        'add_args'  => array_map( 'urlencode', $query_args ),
        'prev_next' => false,
        'type'      => 'array'
    ));

    if ( $links ) :
    ?>
        <nav>
            <ul>
            <?php foreach ($links as $link): ?>
               <li>
               <?php echo $link; ?>
               </li>
            <?php endforeach; ?>
            </ul>
        </nav>
    <?php
    endif;
}