WordPress at a glance
action is not described

untrash_post action-hook . WP 2.9.0

Fires before a post is restored from the Trash.

Usage

add_action( 'untrash_post', 'action_function_name_6210', 10, 2 );
function action_function_name_6210( $post_id, $previous_status ){
	// action...
}
$post_id(int)
Post ID.
$previous_status(string)
The status of the post at the point where it was trashed.

Changelog

Since 2.9.0 Introduced.
Since 5.6.0 The $previous_status parameter was added.

Where the hook is called

wp_untrash_post()
untrash_post
wp-includes/post.php 3293
do_action( 'untrash_post', $post_id, $previous_status );

Where in WP core the hook is used WordPress

Usage not found.