wp_untrash_post_comments( int|WP_Post|null $post = null ): true|null

4329function wp_untrash_post_comments( $post = null ) {4330	global $wpdb;4331 4332	$post = get_post( $post );4333 4334	if ( ! $post ) {4335		return null;4336	}4337 4338	$post_id = $post->ID;4339 4340	$statuses = get_post_meta( $post_id, '_wp_trash_meta_comments_status', true );4341 4342	if ( ! $statuses ) {4343		return true;4344	}4345 4346	/**4347	 * Fires before comments are restored for a post from the Trash.4348	 *4349	 * @since 2.9.04350	 *4351	 * @param int $post_id Post ID.4352	 */4353	do_action( 'untrash_post_comments', $post_id );4354 4355	// Restore each comment to its original status.4356	$group_by_status = array();4357	foreach ( $statuses as $comment_id => $comment_status ) {4358		$group_by_status[ $comment_status ][] = $comment_id;4359	}4360 4361	foreach ( $group_by_status as $status => $comments ) {4362		// Confidence check. This shouldn't happen.4363		if ( 'post-trashed' === $status ) {4364			$status = '0';4365		}4366		$comments_in = implode( ', ', array_map( 'intval', $comments ) );4367		$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->comments SET comment_approved = %s WHERE comment_ID IN ($comments_in)", $status ) );4368	}4369 4370	clean_comment_cache( array_keys( $statuses ) );4371 4372	delete_post_meta( $post_id, '_wp_trash_meta_comments_status' );4373 4374	/**4375	 * Fires after comments are restored for a post from the Trash.4376	 *4377	 * @since 2.9.04378	 *4379	 * @param int $post_id Post ID.4380	 */4381	do_action( 'untrashed_post_comments', $post_id );4382 4383	return null;4384}