我想将特色图片添加到我的RSS提要中。

function rss_post_thumbnail($content) {

    global $post;

    if(has_post_thumbnail($post->ID)) {
        $content = \'<p>\' . get_the_post_thumbnail($post->ID) . \'</p>\' . get_the_content();
    }
    return $content;
}
add_filter(\'the_excerpt_rss\', \'rss_post_thumbnail\', 20, 1);
add_filter(\'the_content_feed\', \'rss_post_thumbnail\', 20, 1);

此代码段显示缩略图，但生成的内容不正确。它显示为短代码，且未格式化。。。

当我使用下面的代码段时，我删除了过滤器的顺序，显示了内容，但缺少了特征图像：

function rss_post_thumbnail($content) {

    global $post;

    if(has_post_thumbnail($post->ID)) {
        $content = \'<p>\' . get_the_post_thumbnail($post->ID) . \'</p>\' . get_the_content();
    }
    return $content;
}
add_filter(\'the_excerpt_rss\', \'rss_post_thumbnail\');
add_filter(\'the_content_feed\', \'rss_post_thumbnail\');

function rss_post_thumbnail($content) {

    global $post;

    if(has_post_thumbnail($post->ID)) {
        $output = \'<p>\' . get_the_post_thumbnail($post->ID) . \'</p>\';
    }
    return $output . $content;
}
add_filter(\'the_excerpt_rss\', \'rss_post_thumbnail\', 20, 1);
add_filter(\'the_content_feed\', \'rss_post_thumbnail\', 20, 1);