我正在试图隐藏特征图像标题，使其无法显示。当前，它将显示build-the-div（但不会填充它，因为它是空的）。理想情况下，我想做的是，如果有人在标题中输入了文本，则只显示div(post_excerpt) 媒体面板中的框。

这是我正在研究的代码：

    function the_post_thumbnail_caption() {
      global $post;

      $thumbnail_id    = get_post_thumbnail_id($post->ID);
      $thumbnail_image = get_posts(array(\'p\' => $thumbnail_id, \'post_type\' => \'attachment\'));

      if ($thumbnail_image && isset($thumbnail_image[0])) {
        echo \'<span>\'.$thumbnail_image[0]->post_excerpt.\'</span>\';
      }
    }

这就是我自己试图隐藏标题（如果标题为空）的原因：

    function the_post_thumbnail_caption() {
      global $post;

      $thumbnail_id    = get_post_thumbnail_id($post->ID);
      $thumbnail_image = get_posts(array(\'p\' => $thumbnail_id, \'post_type\' => \'attachment\'));
      $thumbnail_caption = $thumbnail_image[0]->post_excerpt;
      $thumbnail_set = isset($thumbnail_image[0]);

        if (! empty($thumbnail_set)) {
          if ($thumbnail_image && isset($thumbnail_image[0])) {
            echo \'<div class="img-caption"><h5>\'.$thumbnail_caption.\'</h5></div>\';
          } else return;
      } else return;
    }

这是我的页面模板中的代码：

    <section class="entry-content">
        <?php if ( has_post_thumbnail() ) : ?>
            <figure class="featured-img alignright">
                <?php the_post_thumbnail(\'med_size\'); ?>
                <?php the_post_thumbnail_caption(); ?>
            </figure><!-- .entry-page-image -->
        <?php endif; ?>
      <?php the_content(); ?>
    </section>

当我删除特色图片上的标题时。它消失了，但div和emtpy仍在创建中h5 要素

以下是两种状态的屏幕截图：

link to when a caption is left blank

here is a link when a caption is filled in

谢谢你的建议和帮助！

Fatal error: Cannot redeclare the_post_thumbnail_caption()