do_action( 'transition_post_status', string $new_status, string $old_status, WP_Post $post )
Fires when a post is transitioned from one status to another.
Parameters
- $new_status
 -  
(string) New post status.
 - $old_status
 -  
(string) Old post status.
 - $post
 -  
(WP_Post) Post object.
 
Source
File: wp-includes/post.php
Changelog
| Version | Description | 
|---|---|
| 2.3.0 | Introduced. | 
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Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/hooks/transition_post_status