我编写了几个函数，在调用之前诱使WordPress认为我们正在上一篇/下一篇文章中previous_post_link 或next_post_link:

/**
 * Displays the next post link that is adjacent to the next post.
 *
 * @param object       $next_post      Optional. The next post to reference. Default is current post.
 * @param string       $format         Optional. Link anchor format. Default \'« %link\'.
 * @param string       $link           Optional. Link permalink format. Default \'%title\'
 * @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term. Default false.
 * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
 * @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default \'category\'.
 */
function next_next_post_link( $next_post = null, $format = \'%link »\', $link = \'%title\', $in_same_term = false, $excluded_terms = \'\', $taxonomy = \'category\' ) {
    global $post;

    // Keep track of the current post so we can reset back later.
    $current_post = $post;

    // If a "next post" is specified, use that.
    if ( $next_post ) {
        $post = $next_post;
        setup_postdata( $post );
    }

    // Make WordPress think we\'re on the next post.
    $post = get_next_post();
    setup_postdata( $post );

    // Echo the next post link, skipping the next post.
    next_post_link( $format, $link, $in_same_term, $excluded_terms, $taxonomy );

    // Reset everything back.
    $post = $current_post;
    wp_reset_postdata();
}


/**
 * Displays the previous post link that is adjacent to the previous post.
 *
 * @param object       $previous_post  Optional. The previous post to reference. Default is current post.
 * @param string       $format         Optional. Link anchor format. Default \'« %link\'.
 * @param string       $link           Optional. Link permalink format. Default \'%title\'.
 * @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term. Default false.
 * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
 * @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default \'category\'.
 */
function previous_previous_post_link( $previous_post = null, $format = \'%link »\', $link = \'%title\', $in_same_term = false, $excluded_terms = \'\', $taxonomy = \'category\' ) {
    global $post;

    // Keep track of the current post so we can reset back later.
    $current_post = $post;

    // If a "previous post" is specified, use that.
    if ( $previous_post ) {
        $post = $previous_post;
        setup_postdata( $post );
    }

    // Make WordPress think we\'re on the previous post.
    $post = get_previous_post();
    setup_postdata( $post );

    // Echo the previous post link, skipping the previous post.
    previous_post_link( $format, $link, $in_same_term, $excluded_terms, $taxonomy );

    // Reset everything back.
    $post = $current_post;
    wp_reset_postdata();
}

结果：