_prime_site_caches()WP 4.6.0

Adds any sites 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.


null. Nothing.


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



Since 4.6.0 Introduced.
Since 5.1.0 Introduced the $update_meta_cache parameter.
Since 6.1.0 This function is no longer marked as "private".

_prime_site_caches() code WP 6.1.1

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

	$non_cached_ids = _get_non_cached_ids( $ids, 'sites' );
	if ( ! empty( $non_cached_ids ) ) {
		$fresh_sites = $wpdb->get_results( sprintf( "SELECT * FROM $wpdb->blogs WHERE blog_id IN (%s)", implode( ',', array_map( 'intval', $non_cached_ids ) ) ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared

		update_site_cache( $fresh_sites, $update_meta_cache );