为WordPress主题添加特色图像功能

wordpress主题添加特色图像功能” />

featured image

1. // 添加特色图像功能
2. add_theme_support(‘post-thumbnails’);
3. set_post_thumbnail_size(130, 100, true); // 图片宽度与高度

1. <?php 
2. if (has_post_thumbnail()) {
3.      // 显示特色图像
4.      the_post_thumbnail();
5. } else {
6.      // 设置特色图像
7.      $attachments = get_posts(array(
8.           ‘post_type’ => ‘attachment’,
9.           ‘post_mime_type’=>’image’,
10.           ‘posts_per_page’ => 0,
11.           ‘post_parent’ => $post->ID,
12.           ‘order’=>’ASC’
13.      ));
14.      if ($attachments) {
15.           foreach ($attachments as $attachment) {
16.                set_post_thumbnail($post->ID, $attachment->ID);
17.                break;
18.           }
19.           // 显示特色图像
20.           the_post_thumbnail();
21.      }
22. } ?>

1. // 特色图像
2. add_filter(‘the_content’, ‘set_featured_image_from_attachment’);
3. function set_featured_image_from_attachment($content) {
4.      global $post;
5.      if (has_post_thumbnail()) {
6.           // 显示特色图像
7.           $content = the_post_thumbnail() . $content;
8.      } else {
9.           // 获取和设置特色图像 
10.           $attachments = get_children(array(
11.                ‘post_parent’ => $post->ID,
12.                ‘post_status’ => ‘inherit’,
13.                ‘post_type’ => ‘attachment’,
14.                ‘post_mime_type’ => ‘image’,
15.                ‘order’ => ‘ASC’,
16.                ‘orderby’ => ‘menu_order’
17.           ));
18.           if ($attachments) {
19.                foreach ($attachments as $attachment) {
20.                     set_post_thumbnail($post->ID, $attachment->ID);
21.                     break;
22.                }
23.                // 显示特色图像
24.                $content = the_post_thumbnail() . $content;
25.           }
26.      }
27.      return $content;
28. }