wp-includes/ms-site.php:353Adds any sites from the given IDs to the cache that do not already exist in cache.
$idsarray$update_meta_cachebooloptionaltruefunction _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, false ); } if ( $update_meta_cache ) { wp_lazyload_site_meta( $ids ); }}Introduced in 5.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ms-site.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.