如何在Wordpress中为损坏的远程服务器urls设置默认缩略图？

function set_default_thumbnail($html, $post_id, $post_image_id) {
    if (strpos($html, 'attachment') === false) {
        $default_image_url = 'URL_OF_YOUR_DEFAULT_IMAGE'; // 设置默认缩略图的URL
        $html = '<img src="' . $default_image_url . '" alt="Default Thumbnail" />';
    }
    return $html;
}
add_filter('post_thumbnail_html', 'set_default_thumbnail', 10, 3);