WordPress在管理面板上显示特色图像

只需将代码复制并粘贴到您的主题函数文件并保存更改即可：

// 在管理面板上显示特色图像
if (!function_exists('AddThumbColumn') && function_exists('add_theme_support')) {
add_theme_support('post-thumbnails', array('post', 'page'));
function AddThumbColumn($cols)
{
$cols['thumbnail'] = __('Thumbnail');
return $cols;
}
function AddThumbValue($column_name, $post_id)
{
$width = (int) 50;
$height = (int) 50;
if ('thumbnail' == $column_name) {
$thumbnail_id = get_post_meta($post_id, '_thumbnail_id', true);
$attachments = get_children(array('post_parent' => $post_id, 'post_type' => 'attachment', 'post_mime_type' => 'image'));
if ($thumbnail_id)
$thumb = wp_get_attachment_image($thumbnail_id, array($width, $height), true);
elseif ($attachments) {
foreach ($attachments as $attachment_id => $attachment) {
$thumb = wp_get_attachment_image($attachment_id, array($width, $height), true);
}
}
if (isset($thumb) && $thumb) {
echo $thumb;
} else {
echo __('None');
}
}
}
add_filter('manage_posts_columns', 'AddThumbColumn');
add_action('manage_posts_custom_column', 'AddThumbValue', 10, 2);
add_filter('manage_pages_columns', 'AddThumbColumn');
add_action('manage_pages_custom_column', 'AddThumbValue', 10, 2);
}