Creating a RSS feed with both Catagories and Tags

https://codex.www.ads-software.com/WordPress_Feeds#Categories_and_Tags

describes how to create tag feeds and catgeory feeds but not how to combine them. Not sure if using something like:

https://www.example.com/?cat=42&tag=foo&feed=rss2

would work.

where do i match up the category number to my category name. How do i go about finding that ?

Have a look at:

https://quirm.net/2009/06/24/finding-wordpress-post-ids/

It also covers finding a category id.

Great, that helped but the link you posted was a bit wrong.

Use this instead

https://www.example.com/?cat_ID=42&tag=foo&feed=rss2

But you response got me to where i needed to be. Thanks

cb

Much more difficult to EXCLUDE a tag from the RSS feed… Any suggestion?

The following code will exclude some tags by their ID from the feed link. In this case the link is a nice url.
I’m pulling all the tags except for those excluded in get_tags().
this will output an URL in the form:
https://yourblog.com/feed/rss?tag=tag1,tag2,tag3,tag7,tag11…

Not very elegant. Better idea?

<?php bloginfo('rss2_url'); ?>/rss?tag=
<?php
$tags = get_tags('exclude=21,28,12,29');
if ($tags) {
  foreach ($tags as $tag) {
  echo $tag->slug.',';
  }
}
?>