修改 Wordpress RSS Feed 的内容

Question

I am trying to move the custom field <rule_short_summary> into the field <content:encoded> so I may display it in an automated newsletter.

This is what I have:

function my_add_to_content($content) {
  $post_id = get_the_ID();
  $rule_short_summary = get_the_terms($post_ID, 'rule_short_summary');
    return  $rule_short_summary;
}
add_filter('the_content_feed', 'my_add_to_content');

Currently content:encoded returns an empty field.

I am taking inspiration from this link: http://https//digwp.com/2019/09/add-content-wordpress-feed/ In this link, the author adds custom text to the content. I want to pull from another field and add to the content.

Answer 1

Custom fields can be called using get_post_meta function. In your given code you have use get_the_terms function - which is wrong for this case of course.

function my_add_to_content($content) {
  $post_id = get_the_ID();
  $rule_short_summary = get_post_meta($post_ID, 'rule_short_summary',true);
    return  $rule_short_summary;
}
add_filter('the_content_feed', 'my_add_to_content');