wp_insert_post to to_ping – controlling pinging for individual posts

So this is really really late. But I had the same problem. Ive created a plugin that imports a swedish microblog (www.bloggy.se, like twitter) into your blog. It checks an rss channel and imports all posts into a specific wordpress category. I wanted to ignore the ping (from “Update service”) with these posts. But only these posts.

I looked like a maniac. I havent even been able to find WHERE in the WordPress codes these are sent. Haha.

Anyway. With some luck I find what I think is a solution. By ignoring all the posts from the specific category in the feed. They are not sent by the “Update Service”. I guess the Update Service uses the xml feed when pinging.

To skip the posts I added this (sort of, a bit edited) into my plugin:

function myPlugin_pre_get_posts($wp_query) {
	if ($wp_query->is_feed) {
		$wp_query->query_vars['category__not_in'][] = $category_id_to_skip_in_feed;
	}
}
add_action('pre_get_posts', 'myPlugin_pre_get_posts');