I’ve got a plugin that attaches itself to both the post and page editors to read and write to the post_content object. I’d like to also attach my plugin to the category manager edit screen.
In the code below, lines 1 and 2 attach it to the post and page editor, but line 3, a shot in the dark, is not yet doing the trick. Any ideas on the proper way to do it?
if ( function_exists('add_meta_box') ) {
add_meta_box('My-plugin', __('My plugin'), 'My_plugin_callback', 'post', 'side', 'high');
add_meta_box('My-plugin', __('My plugin'), 'My_plugin_callback', 'page', 'side', 'high');
//??? add_meta_box('My-plugin', __('My plugin'), 'My_plugin_callback', 'category', 'side', 'high');
}
I’m pretty sure that even if you add that meta box at the bottom of the category edit you will still have the problem of meta table for categories, and i bet that your meta_box ‘save’ function saves as postmeta data table.
However this can be done using the options table here is an how to add extra fields to categories
Hope this helps