Is user listing on wordpress private?

No, user data is not visible to the outside world, or to google, unless you specifically make it visible in the theme somehow. One piece of user data is exposed for authors of posts though. Specifically, their login names are visible in many places.

add_option_page capability behaving strange

admin_init is called after wp-admin/menu.php is included, so the access check has already been executed and the admin_menu action has fired by the time you execute test_options(). Remove the admin_init hook and call test_options() directly, or find another way of structuring your code so that the admin_menu hook is set up correctly. You might think … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)