Hook for Page Attributes Metabox

[markcallen]

The publish metabox provides two hooks to add additional information/elements to it.

post_submitbox_misc_actions
attachment_submitbox_misc_actions

It would be trivial to add a similar hook to the Page Attributes meta box - is there any reason why this can't be done?

Adding page related meta in an entirely new metabox isn't great for UX - two places for page attributes is silly.

There are several solutions touted in the wild ranging from hacking core to removing and recreating the metabox manually or inserting the elements with javascript - none good solutions.

The addition of a single hook would allow much better practice to be adopted in adding options to this metabox.

do_action( 'page_attributes_misc_actions' );

[MikeHansenMe]

34034.diff​ adds a new hook that fires directly after post_submitbox_misc_actions. post_submitbox_misc_actions fires on pages and the post object is passed in so it could be targeted that way but this still seems beneficial for specific post types. This hook also works for other post_types besides pages that may use the same metabox, which could be a lot.

[markcallen]

This adds a hook to the Publish (aka submitbox) - this ticket refers to the Page Attributes metabox.

The post_submitbox_misc_actions hook is sufficient because you can test for post types in the callback.

It just needs, in my opinion, do_action( 'page_attributes_misc_actions' ); adding in or around L777 of the wp-admin/meta-boxes.php file.

[MikeHansenMe]

Let me know if 34034.2.diff​ covers what you are looking for. I placed it after the default attributes.

[markcallen]

Works for me, thanks Mike.

[markcallen]

This has been sat here for well over a year - it's simple, it has a patch and it's ready to go.

Is there a good any reason for this not being committed - or even reviewed?

Be good to have some feedback at least.

[lukecavanagh]

@markcallen

Patch is valid and still applies cleanly.

https://core.trac.wordpress.org/browser/tags/4.7.2/src/wp-admin/includes/meta-boxes.php#L833

[markcallen]

Replying to lukecavanagh:

@markcallen

Patch is valid and still applies cleanly.

https://core.trac.wordpress.org/browser/tags/4.7.2/src/wp-admin/includes/meta-boxes.php#L833

Thanks @lukecavanagh.

It's a very simple patch that makes WordPress more extensible. It just needs to be committed, or if there are any reasons for not (personally, I can't think of any), then the points need raising to be discussed.

[SergeyBiryukov]

page_attributes_misc_attributes might be a better name, as there are no actions in this box.

[markcallen]

Updated for inclusion in 4.8

[markcallen]

Thanks @SergeyBiryukov.

Patch is refreshed.

[Braad]

Yes please! Patch looks good.

[jbpaul17]

Punting to 4.8.1 per today's bug scrub.

[SergeyBiryukov]

In 41763:

Posts, Post Types: Introduce page_attributes_misc_attributes action that fires before the help hint text in the 'Page Attributes' meta box.

Props markcallen, MikeHansenMe.
Fixes #34034.