用数字代替分页

<?php if ($wp_query->max_num_pages > 1) : ?>
            <nav class="post-nav">
                <ul class="pager">
                    <li class="previous"><?php next_posts_link(esc_html__('&larr; Older posts', THEMO_TEXT_DOMAIN)); ?></li>
                    <li class="next"><?php previous_posts_link(esc_html__('Newer posts &rarr;', THEMO_TEXT_DOMAIN)); ?></li>
                </ul>
            </nav>
            <?php endif; ?>

我将如何替换数字分页,我将如何进行这项工作?