Wordpress wp编辑器

I am trying to integrate wp_editor in a popup. I used this function

$content = '';
$editor_id ='content';
wp_editor( $content, $editor_id);

but on submit, I didn't get any data. I also tried to integrate featured image meta box in that pop up. I'm using this

add_meta_box('postimagediv', __('Featured Image'),'post_thumbnail_meta_box', $post_type, 'side', 'low');

but i didn't get any meta box.