wp_publish_post not checking for unique post slugs

[hughie.molloy]

When published a post using wp_publish_post no check is done to see if the slug / post_name is unique. This leads to problems with the permalink.

I have attached a patch file to the ticket as I could not make a PR to the github

Steps to reproduce:
Make and publish an article titled 'test'. ID 1
Make and set to draft a second article titled ' test'. ID 2

call wp_publish_post(2)
the post name of articles 1 and 2 are both set to test.

This can be worked around by calling the following code instead:

<?php

$post = [
    'ID' => 2,
    'post_status' => 'publish',
];

wp_update_post($post);  

[hughie.molloy]

git patch file to fix the issue

Making sure post name is unique when publishing article with wp_publish_post

When wp_publish_post is called there is no check to see if the slug (post_name) or the post is unique. This leads to multiple posts having the same URL.

Added a call to wp_unique_post_slug and setting the new slug on DB update to publish

Trac ticket: https://core.trac.wordpress.org/ticket/50447

[SergeyBiryukov]

#51427 was marked as a duplicate.

[niravsherasiya7707]

phpunit test for the patch file submitted by hughie.molloy

• A draft post which have identical title and slug to already publish post, testcase ensure that after changing post status to publish of draft post with wo_publish_post function the slug will be unique with the all available slug in posts table.

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Trac ticket: https://core.trac.wordpress.org/ticket/50447