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I have a Bakery page. Every time I add a child page such as cakes, I would like to add the page title cakes to a custom taxnomy. I also want to add this child page to a menu which displays these child pages.

I have found out that I need to hook into the new_page. So something like this,

    check if this page is type of page and parent_page is Bakery Page's ID

    If yes, then add this page to menu which displays the child pages. I suppose I need the ID of the menu but I do not know how to find it, not even to hard code it.

    Lastly I want to add the title of this page to a custom taxonomy.

Can you help?

share|improve this question
That hook won't work in this case, and it'd have to be add_action('new_auto-draft', 'callback');, and kind of useless for your need. You are asking two very different questions (add-to-menu & create-custom-taxonomy). For the second one research this. I'm voting to close the Q, and suggest you to refactor it focusing in one item, and putting more research in it. And opening a new one for the other. .... Nice trick, to put more text into pseudo-code :) – brasofilo Dec 2 '12 at 2:43
up vote 1 down vote accepted

I agree with @brasofilo that this is two very different questions, but I think we can answer both here.

1. Automatically add child pages of A to custom taxonomy B's term C.

We'll add the term 'yummy' in the custom taxonomy 'food-adjective' to all child pages of page ID 123 when they're published. You can add this to your theme's functions.php file.

 * Automatically add a custom taxonomy term to child pages of page 123 on publish
 * @param int $post_id 
 * @param object $post The new post
 * @return void
function wpse_74605_auto_tax( $post_id, $post ) {
    if ( 123 === $post->post_parent ) {
        wp_set_post_terms( $post_id, 'yummy', 'food-adjective', true );
add_action( 'publish_page', 'wpse_74605_auto_tax', 10, 2 );

2. Automatically add child pages to menu

This is covered in a number of plugins, so I won't reinvent the wheel here. I'd recommend Viper007bond's Add Descendants as Submenu Items.

share|improve this answer
Thanks a lot. very helpful – Lucky Luke Dec 2 '12 at 20:41

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