How to store user meta data?

Question

I've seen that it was possible to store custom meta data in Drupal 7 but I didn't find the equivalent for Drupal 8 ?

https://martsie.github.io/2015/03/04/drupal-how-to-use-user-data/

The data that I need to store is temporary user data that might differ from each users and it's not needed to put it as field (no sql query needed).

Answer 1

You can use the user.data service

\Drupal::service('user.data')->set('mymodule', $uid, 'some_key', 'some_value');

You can then retrieve it with the same service:

$some_key = \Drupal::service('user.data')->get('mymodule', $uid, 'some_key');