parent_dropdown() should verify that a post has been fetched

[mweichert]

If you call parent_dropdown() and no post has been provided or populated, then an E_NOTICE will be emitted in template.php:683 because $post is null.

The fix is to adjust line 681 from:

if ( $items ) {

to...

if ($post && $items) {

I've attached a patch.

To reproduce:

1. Ensure that your server is configured to show E_NOTICE errors.
2. Install NextGEN Gallery
3. Go to the Manage Galleries Page
4. Click on a gallery.
5. Voila. ;)

Patch for template.php

another issue is that this function can not be used outside of the loop such as within the wp-admin.

A simple fix is to change the function argument declarations from

function parent_dropdown( $default = 0, $parent = 0, $level = 0 ) {

to:

function parent_dropdown( $default = 0, $parent = 0, $level = 0, $post = array() ) {

and then also change:

$post = get_post();

to

	if ( empty( $post )) {
		$post = get_post();
	}	

which would allow a WP post object to be passed into the function.

Sorry I am unable to provide an SVN patch.

parent_dropdown_fix.patch​ looks sane.

Let's leave the enhancement from comment:2 for another ticket.

Replying to SergeyBiryukov:
Why was this changed to Version 1.5???

That was released like 8 years ago!!!

Replying to SergeyBiryukov:

parent_dropdown_fix.patch​ looks sane.

Let's leave the enhancement from comment:2 for another ticket.

OK I will create one

Replying to charliespider:

Why was this changed to Version 1.5???

Version number indicates when the issue was initially introduced/reported.

parent_dropdown() (with that particular piece of code) was introduced in 1.5: [1747].

Replying to SergeyBiryukov:

Replying to charliespider:

Why was this changed to Version 1.5???

Version number indicates when the issue was initially introduced/reported.

parent_dropdown() (with that particular piece of code) was introduced in 1.5: [1747].

ahhh ok

thank you for explaining

I have created a new ticket for my issue: #23162

Actually, this wasn't an issue before [21735], where !empty( $post_ID ) check was removed.

parent_dropdown_fix.patch​ introduces a change in the behaviour: it makes parent_dropdown() return false rather than still display the dropdown when being called outside of the loop.

23026.patch​ keeps the current behaviour and just fixes the notice.

In 23351:

Make sure the post exists before checking its ID. fixes #23026.