WordPress上一篇、下一篇文章链接添加title属性的方法

<?php previous_post_link('%link','<<') ?>
<?php next_post_link('%link','>>') ?>

<a href="……" rel="external nofollow"  rel="external nofollow" > …… </a>
<a href="……" rel="external nofollow"  rel="external nofollow" > …… </a>

<?php previous_post_link('%link','<<') ?>
<?php next_post_link('%link','>>') ?>

<?php
$prev_post = get_previous_post();
if (!empty( $prev_post )): ?>
  <a title="<?php echo $prev_post->post_title; ?>" href="<?php echo get_permalink( $prev_post->ID ); ?>" rel="external nofollow" ><?php echo $prev_post->post_title; ?></a>
<?php endif; ?>
<?php
$next_post = get_next_post();
if (!empty( $next_post )): ?>
  <a title="<?php echo $next_post->post_title; ?>" href="<?php echo get_permalink( $next_post->ID ); ?>" rel="external nofollow" ><?php echo $next_post->post_title; ?></a>
<?php endif; ?>