serilaze image field values and update another field

Hi.

I need to add some image field values and update these values to another custom field with serialized format...

For example my metabox image field is image_field

My custom post meta field is image_gallery . I dont use this field with metabox plugin

After i insert or update or save post i want update image_gallery post meta to be updated with image_field values with serilazied format..Also i want to do this in front-end with front end sub extension.

I think i can do that with rwmb_after_save_post action.

I am doing this with another plugin. Here i share the snippet with you which i use for another plugin.

function wpuf_woo_product_gallery( $post_id ) {
if ( isset( $_POST['wpuf_files']['image_field'] ) ) {

$images = get_post_meta($post_id, 'image_field' );
update_post_meta( $post_id, 'image_gallery', implode(',', $images) );

$serialize = maybe_serialize( $images );
update_post_meta( $post_id, 'image_gallery', $serialize );

}
}

add_action( 'wpuf_add_post_after_insert', 'wpuf_woo_product_gallery' );
add_action( 'wpuf_edit_post_after_update', 'wpuf_woo_product_gallery' );

Can you share a snippet to do this with Metabox if possible ? Sorry that i am not a developer.

Thanks