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I also thought that I'd add that I tried some other options as tests. My hunch is that rwmb_frontend_after_display_confirmation runs before rwmb_frontend_after_process and that is why nesting the hooks as I did above does not work.

However, I tried other options that also do not work. For example this code does not output another message as desired:

add_filter( 'rwmb_frontend_validate', function( $validate, $config ) {

    add_action( 'rwmb_frontend_after_display_confirmation', function( $config ) {
      echo  "<div class=\"rwmb-error\">Unfortunately, your newsletter subscription failed.</div>";
    }, 9, 1 );

    return $validate;
}, 10, 2 );

I'm kind of at a loss of what else to try. I have yet to figure out any way to dynamically add a message depending on what the user submitted.

Hi Long,

I don't think this answer quite gets at the problem I was having (which is still unsolved).

What I was trying to say is this. When ajax is turned on, the following no longer works:

add_action( 'rwmb_frontend_after_process', function( $config, $post_id ) {
$reference_post_ID = get_queried_object_id();

$data = [
    'reference_post_ID' => $reference_post_ID,
    'field_2' => 'value 2',
    'field 3' => ['one', 'two', 'three'],
];

\MetaBox\CustomTable\API::update( $post_id, 'my-custom-table', $data );
}, 10, 2 );

The idea is that I want to save the ID of the current post where the form is displayed to the post that is being submitted by the user. That way, I can track which post each submission came from. This works with [mb_frontend_form id="field-group-id" ajax="false"] but it fails when [mb_frontend_form id="field-group-id" ajax="true"]

Thanks,
Graceson

Hi Long,

I had forgotten that MB can do that, so thanks for pointing it out! However, what I think would be nice is a solution that is a bit more complete.

Because phone numbers around the world have different formatting systems, it would be really nice to have a field that is more flexible. That is why I propose a field that has a built-in drop-down for selecting the proper country code. Once the user has selected the code for their country, the form could automatically use the proper format validation for that country’s phone number format.

Is this something that could be done?

So I have now had a chance to try test out building this shortcode. I decided to try using php in a custom plugin so that I could give the shortcode my own name. However, I can't figure out how to solve a couple problems.

I am planning on having the shortcode look as follows [ref pub_id=399], where pub_id is the post ID for the publication post that I am trying to cite.

The first issue I am having is that I would like the shortcode to return a number every time it is called. The first instance should return 1, the second time it should return 2, and so on. However, if the same publication post is called multiple times, I would like all of those shortcodes to return the same value.

The second issue that I can't figure out is how to output my reference list at the end of the page. My goal is that at the end of the_content WordPress will automatically insert a numbered list of all the publications I am trying to cite. I think I know how to do this, if I can only figure out a good way to determining all of the instances of the shortcode used on the page and what order they were used in.

My initial though of how to handle these two issues was to write the shortcode function to set up an array and then add the pub_id value to that array each time the shortcode is used. I would then use that array in another function hooked to the_content. I tried using a global variable to do this, but I can't seem to get the values to be passed. After some research, it looks like shortcodes are only meant to return strings, and global variables are discouraged.

The next thing idea I had was to write a function that looks for all of the times the shortcode has been used in the_content and then use that information to append the citations into the-content. I found this question which seems very related: https://stackoverflow.com/questions/56627970/wordpress-get-all-shortcodes-from-content-field. I haven't tried this method yet, but it should probably work for creating the citation list at the end of the post. The issue then becomes, how do I get the shortcode to return the proper numbers at each location as described above?

I am a php and wordpress beginner, so I think that what would be most helpful is to get suggestions on high-level approaches to getting the functionality I desire. Basically, the end goal is to get LaTeX-like citing functionality within WordPress. I haven't found any existing plugins that do this the way I would like, and so this shortcode approach seemed like a good idea to me, but maybe there is another option that I haven't considered at all.