Meta Box

Dear ludovic,

You're right. Conditional Logic currently only works in admin. I'll check the plugin and release new update asap!

Dear zazezi,

Can you please open the Console and copy the error if you see? If it doesn't show any error message, can you please copy your code here?

Dear uththamag,

Sorry to make you feel confusing, I've checked both Columns and Conditional Logic and see it works as your requested. Please see my example and let me know if you have further problems.

Dear xoomserve,

Here is the example which I've created with MB Builder:

add_filter( 'rwmb_meta_boxes', 'your_prefix_register_meta_boxes' );

function your_prefix_register_meta_boxes( $meta_boxes ) {

    $meta_boxes[] = array (
      'id' => 'untitled-metabox-2',
      'title' => 'Untitled Metabox',
      'pages' =>   array (
         'post',
         'page',
      ),
      'context' => 'normal',
      'priority' => 'high',
      'autosave' => false,
      'fields' =>   array (
         
        array (
          'id' => 'properties',
          'type' => 'taxonomy',
          'name' => 'Properties',
          'taxonomy' => 'product_type',
          'field_type' => 'select',
        ),
         
        array (
          'id' => 'another_text_field',
          'type' => 'text',
          'name' => 'Text Field',
          'visible' =>       array (
            'when' =>         array (
              array (
                 'taxonomy_2',
                 '=',
                 '4',
              ),
            ),
            'relation' => 'and',
          ),
        ),
      ),
    );

    return $meta_boxes;
}

Basically, you can register your taxonomy field and another field normally. And then, in related field (Text in this example), just define your conditional logic:

'visible' => ['your_taxonomy_id', '=', 'taxonomy_value']

Dear bdthemes,

Here is an example:

add_filter( 'rwmb_meta_boxes', 'YOURPREFIX_register_meta_boxes' );

function YOURPREFIX_register_meta_boxes( $meta_boxes ) {
    // Define a meta box
    $meta_box = array(
        'title'      => __( 'Media', 'textdomain' ),
        'post_types' => 'post',
        'fields'     => array(
            array(
                'name' => __( 'URL', 'textdomain' ),
                'id'   => 'url',
                'type' => 'text',
            ),
        )
    );

    // Add new field when condition meets
    if (get_theme_mod( 'orphan_toolbar')) {
        $meta_box['fields'][] = array(
            'name'     => 'Toolbar',
            'id'       => $prefix . "toolbar", 
            'type'     => 'checkbox',
            'desc'     => 'Enable or disable the toolbar for this page.',
            'tab'      => 'layout',
        ),
    }

    // Add the meta box to $meta_boxes array to register
    $meta_boxes[] = $meta_box;
}

Dear Jason,

Can you please tell me your PHP version, in the example I use anonymous function so perhaps it doesn't works with PHP 5.2.

Btw, can you please turn on WP_DEBUG and/or WP_DEBUG_LOG to see the full output message. Kindly check the WP official documentation: https://codex.wordpress.org/Debugging_in_WordPress

Best regards,
Tan

Dear bdthemes,

Conditional Logic works with Javascript callback only, it doesn't works with PHP, however, with PHP, you can check if meet a condition and then register meta box or field, like so:

if (get_theme_mod('orphan_toolbar')) {
    $meta_boxes = [
        ...
    ];
}

Sound great. Yeah, I think in this case, thats best practice.