Howto do_action('function', $post->ID, $some, $args);

Hi everybody,

I’m trying to save data from my custom meta boxes, this can be one meta box, but also multiple. With the following code:

function image_attachments_init() {
	if($types = get_option('image_attachments_post_types')) {
    $fields = array();
    foreach ($types as $type)  {

      $image_size_name = get_option('image-size-name');
      $image_size_slug = get_option('image-size-slug');
      for($i = 0; $i <= count($image_size_name[$type]); $i++) {
        if($image_size_slug[$type][$i] != '' && $image_size_name[$type][$i] != '') {
          $settings[$image_size_slug[$type][$i]] = $image_size_name[$type][$i];
        }
      }
      //E.G: $settings['test'] => 'test1', $settings['test2'] => 'test2'
      foreach($settings as $slug => $name) {
        $fields[] = $slug;
        add_meta_box($slug, $name, 'image_attachments_setup', $type, 'normal', 'high', array('slug' => $slug, 'name' => $name));
      }
    }
  }

  //Must be executed once, right? Not in a loop...
  add_action('save_post','image_attachments_save', 5, 3);
  //Fields is now an array(2) { [0] => 'test1', [1] => 'test2' }, let's send them to image_attachments_save
  do_action_ref_array('save_post', $fields);
}
add_action('admin_init','image_attachments_init');

the ‘image_attachments_save’ function is the following

function image_attachments_save($fields) {
  global $post_id;
  echo $post_id;
  $post_id = $post->ID;
  /**
    *
    * The fields are defined in the function image_attachments_init(), so check if it's
    * array(2) { [0] => 'test1', [1] => 'test2' }
    * Ok, here we go, var_dump($fields);
    * Only gives string('test1') and int(788) and this is the post_id.... :confused:.
    * Just want to get array(2) { [0] => 'test1', [1] => 'test2' }
    */
  var_dump(fields);
	return $post_id;
}

If i’m doing a var_dump($fields) in image_attachments_save, i’m not getting the values in my $fields array.
How can this be done, and how can i get the new post id in the ‘image_attachments_save’ function.