Thanks R’phael .

These functions are indeed very useful and I have written about them in Add Term and Taxonomy MetaData.

Well, its been a while since I revisited this topic! But, here is new information regarding this for more recent (2.9+) releases of WP.

Along with the variable hooks:
created_{taxonomy}
edited_{taxonomy} (ie: edited_category or created_category )

Taxonomy meta data is also now handled with core functions:

add_metadata()
update_metadata()
get_metadata()

however, unless its the standard ‘Category’ taxonomy, additional tables will have to be created to store the data from the new functions

http://codex.wordpress.org/Function_Reference/add_metadata#Database_Requirements

With these functions and hooks, WP devs now have the capability to expand the edit category admin panel with core supported functions.

Thanks for the great information. I have expanded the article, and I think it is more accurate now.

I still cannot see a good way to inject data into the wp_update_term database calls though. If you know of a good way, please let me know so that I can further improve the article.

Thanks!

What you describe is definitely do-able –

You can go in and change the source file, but that generally isn’t a good solution because you will lose all changes whenever you update WordPress.

A better way is to add your new category interface using the add_meta_box command, and possibly remove the old category interface with the remove_meta_box command (??never used remove_meta_box before so don’t know for sure).

To create your new interface function, look at the source file –
wp-admin/edit-form-advanced.php

There should be a function in there called –
post_categories_meta_box

This is what wp calls to render its existing category box. Just copy that code and alter it in your own file to create the interface that you want. Then add it into the Edit post interface using add_meta_box.

Hi Pax,
The code looks right to me – so I am not sure why it is not working. I just pasted the same code into the functions.php file of my ‘default’ theme, activated it, and the drop-down menu does appear for me in the “Edit Category” screen, right above the Update Category button.

It will only show in the full Edit Category screen though – not on the Add Category, Quick Edit, or other related screens.

Do you get any error messages? You may want to just do an echo in the your_input_box function and then visit the “Edit Category” source page to see if the echo comes through.

_________
PS. As you get around well with WP admin hacks, is there a easy way to get around this: http://stackoverflow.com/questions/1552307/pseudo-custom-taxonomies-from-categories [reasons explained over stack overflow]

10x,
alex

The I have checked the ‘Add New Post’ page where I couldn’t see any new inputs.
Am I doing things as supposed to? 🙂

Can you share some of your code?