Ajax for subscibers not working

Question

I have a very simple AJAX function that works fine when logged in as admin, but when logged in as a subscriber the call to admin-ajax.php returns a html page with the header and footer of my theme, and that's it.

By doing some wolf fencing I've tracked it down to line 37 of admin-ajax.php do_action( 'admin_init' );. It gets there and just returns.

Answer 1

If an AJAX function does not work properly, in most cases you forgot to allow Users with no or little privileges to access the function.

Adding the Callback Function is quite simple:

add_action('wp_ajax_my_action', 'my_action_callback');

Now you need to do the same thing for the "not-so-privileged" users:

add_action('wp_ajax_nopriv_my_action', 'my_action_callback');

With these two lines everything should work as expected.