What is the WordPress `clean_post_cache()` function and what cache groups does it clear?

Question

WordPress Expert — Hard

What is the WordPress `clean_post_cache()` function and what cache groups does it clear?

Accepted Answer

The `clean_post_cache()` function in WordPress clears all cache entries related to a post, including post object cache, post meta cache, permalink cache, and associated terms. It ensures a complete cache invalidation process, but needs to be manually called when updating posts directly using $wpdb.