/**
* Authenticate an old user by verifying the latest entry in the auth cookie.
*
* @param WP_User $user A WP_User object (usually from the logged_in cookie).
* @return bool Whether verification with the auth cookie passed.
*/
public static function authenticate_old_user(WP_User $user)
{
$cookie = user_switching_get_auth_cookie();
if (!empty($cookie)) {
if (user_switching::secure_auth_cookie()) {
$scheme = 'secure_auth';
} else {
$scheme = 'auth';
}
if ($old_user_id = wp_validate_auth_cookie(end($cookie), $scheme)) {
return $user->ID === $old_user_id;
}
}
return false;
}
