WordPress at a glance
function is not described

clean_user_cache() WP 3.0.0

Clean all user caches

  • Since 4.4.0 'clean_user_cache' action was added.
Hooks in function
Return

Nothing (null).

Usage

clean_user_cache( $user );
$user(WP_User/int) (required)
User object or ID to be cleaned from the cache

Code of clean user cache: wp-includes/user.php VER 5.1.1

<?php
function clean_user_cache( $user ) {
	if ( is_numeric( $user ) ) {
		$user = new WP_User( $user );
	}

	if ( ! $user->exists() ) {
		return;
	}

	wp_cache_delete( $user->ID, 'users' );
	wp_cache_delete( $user->user_login, 'userlogins' );
	wp_cache_delete( $user->user_email, 'useremail' );
	wp_cache_delete( $user->user_nicename, 'userslugs' );

	/**
	 * Fires immediately after the given user's cache is cleaned.
	 *
	 * @since 4.4.0
	 *
	 * @param int     $user_id User ID.
	 * @param WP_User $user    User object.
	 */
	do_action( 'clean_user_cache', $user->ID, $user );
}