_prime_post_caches() WP 3.4.0

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

This is an internal function for using it by WP core itself. It's not recommended to use this function in your code.

No Hooks.

Return

````. Null. Nothing.

Usage

_prime_post_caches( $ids, $update_term_cache, $update_meta_cache );

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

Notes

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

Changelog

Since 3.4.0

Introduced.

Code of `_prime_post_caches() prime post caches` ^{WP 5.7}

wp-includes/post.php

<?php
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)", implode( ',', $non_cached_ids ) ) );

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