Do WordPress' cron's clean up expired transients?

Question

WordPress has a cron named "delete_expired_transients" as seen in the image below.

In this way, does it clean expired transients daily?

---

Or is it just giving us action?

Should we clean it ourselves in this way according to the hook?

add_action('delete_expired_transients', 'my_custom_fn');

function my_custom_fn()
{
  delete_expired_transients();
}

See also: delete_expired_transients()

Answer 1

Yes, delete_expired_transients is a cron event that runs once per day and the function delete_expired_transients() is automatically called when the cron event runs — see wp-includes/default-filters.php. So you do not need to call the function manually like you did in your my_custom_fn() function.

And if you use a plugin like WP Crontrol, you can easily view the cron events in your site and the actions (functions) that will be called when a specific cron event runs.