Display metabox conditionally

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I have searched left, right and center and believe that this does not exist as a built in option in WordPress; is there any way to, problematically, display (or not) a metabox in a custom post type edit screen depending on the content of a metakey value?

The only idea i have is to display the content of the metakey in a hidden field, retrieving it’s value with jQuery and based on its content deleting the div containing the metabox pr not.

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The content of the metabox is quite resource intensive so i am looking for another solution.

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1 comment

  1. Of course…

    function generic_cb($post) {
  echo 'This is a test of the emergency callback system.';
}

add_action( 'add_meta_boxes_page', 'conditional_meta_box' );
function conditional_meta_box($post) {
  $meta = get_post_meta($post->ID,'meta_key',true);
  if ('abc' === $meta) {
    add_meta_box(
        'emcb',
        'CB Test',
        'generic_cb',
        'page',
        'normal',
        'high'
    );
  }
}

    The add_meta_boxes* hooks pass the $post variable, so use it to check the meta key in question and conditionally add the meta box. There is a generic add_meta_boxes hook that always runs, but other add_meta_boxes_CPTSLUG hooks that are limited to particular post types. My example applies only to pages.

    If your content is a resource intensive as you say, I’d look into transients.

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