Add Multiselect Option to wp_dropdown_pages / wp_dropdown_categories

[jackreichert]

Select menus are helpful, but sometimes you want to offer the ability to select more than one option. The attached patch adds functionality to add multiple="multiple" if needed.

patch adds multiple="multiple" to wp_dropdown_pages()

Same fix for wp_dropdown_categories

#15523

Oh, the other patch wasn't there as I closed the ticket.

If you want you can re-open it and add wp_dropdown_categories to the title.

Thanks, did that.

Same comment as in the other ticket: <select multiple> has a horrible UX. We should not encourage it's use.

I agree that multiselect does not provide good UX, however there are use-cases, such as settings pages for plugins and themes. That's how I came across the issue and thought it would be worth a shot submitting the patch.

Why not provide a list of checkboxes instead, since that's what we use for the category metabox, after all.

Replying to scribu:

Why not provide a list of checkboxes instead, since that's what we use for the category metabox, after all.

Agreed. If you want multiple select, why not just use the checkbox list instead?

That is what I ended up doing with the theme I was developing.

So, wp_terms_checklist() covers that.

What use-cases are there to warrant a wp_pages_checklist()?

Similar to terms checklist i.e. adding specific functionality to user-specified pages. For example, a widget that isn't relevant for all pages, only some. I agree that a wp_post_checklist might be overkill.

I'd be happy to create the patch if you think it's warranted.

Replying to scribu:

So, wp_terms_checklist() covers that.

What use-cases are there to warrant a wp_pages_checklist()?

Any idea what function renders the Pages checklist on nav-menus.php?

It's probably loose code, but would be worth putting it into a function. Two birds with one stone.

If someone does write a patch that implements wp_posts_checklist() and uses it in nav-menus.php, please open a new ticket.

Follow-up: #20167