WordPress at a glance
function is not described

_prime_post_caches() WP 3.4.0

Adds any posts from the given ids to the cache that do not already exist in cache

  • See: update_post_caches()
  • Global. wpdb. $wpdb WordPress database abstraction object.

No Hooks.


Nothing (null).


_prime_post_caches( $ids, $update_term_cache, $update_meta_cache );
$ids(array) (required)
ID list.
Whether to update the term cache.
Default: true
Whether to update the meta cache.
Default: true

Code of prime post caches: wp-includes/post.php WP 5.2.1

function _prime_post_caches( $ids, $update_term_cache = true, $update_meta_cache = true ) {
	global $wpdb;

	$non_cached_ids = _get_non_cached_ids( $ids, 'posts' );
	if ( ! empty( $non_cached_ids ) ) {
		$fresh_posts = $wpdb->get_results( sprintf( "SELECT $wpdb->posts.* FROM $wpdb->posts WHERE ID IN (%s)", join( ',', $non_cached_ids ) ) );

		update_post_caches( $fresh_posts, 'any', $update_term_cache, $update_meta_cache );