Admin-side hooks don't work (WordPress) - wordpress

Question

I want to send an email whenever a file is attached to a certain CPT, however I can't make add_attachment hook work. In fact I can't seem to make any dashboard hook (such as post_updated) work. The code below does nothing whenever a file is attached to a post or post gets updated:
add_action( 'add_attachment', 'goldorak' );
add_action( 'post_updated', 'goldorak' );
function goldorak() {
echo 'Fired!';
echo "<script>alert('Fired!');</script>";
}
Note: my attachment is a file field created with Advanced Custom Fields plugin.

Answer 1

I am not sure ACF fires the same actions as the normal wordpress. Here is the ACF version of your code:
add_action( 'acf/save_post', 'goldorak', 15 ); // The saving is done with priority 10, so 15 is after the save to DB, 5 before it.
function goldorak() {
die('test');
}
But in your case, the hook acf/update_value/type=file would simplify your task:
add_action('acf/update_value', 'acf_hook_update_value', 1, 3);
function acf_hook_update_value($new_value, $post_id, $field_options) {
$key = $field_options['key']; // internal key name
$name = $field_options['name']; // pretty name
$old_value = get_field($key, $this->post_id, false);
$new_value = stripslashes($new_value);
if ($new_value != $old_value) {
die('test'); // Do something ...
}
}