From 01f88b1ae4c8fe69fb844216043d43aa086fc271 Mon Sep 17 00:00:00 2001
From: Eric Andrew Lewis <ericlewis@git.wordpress.org>
Date: Tue, 26 Jan 2016 03:46:40 +0000
Subject: [PATCH] Comments: Fire an action after a comment is removed from
 object cache.

When a comment is removed from the object cache, the `clean_comment_cache` action is now fired. This provides plugin and theme developers a chance to perform secondary cache invalidation as needed.

Props spacedmonkey.
Fixes #35610.


git-svn-id: https://develop.svn.wordpress.org/trunk@36405 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/comment.php | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/wp-includes/comment.php b/src/wp-includes/comment.php
index 3d1439a8a7..68ad759e97 100644
--- a/src/wp-includes/comment.php
+++ b/src/wp-includes/comment.php
@@ -2516,15 +2516,24 @@ function xmlrpc_pingback_error( $ixr_error ) {
 //
 
 /**
- * Removes comment ID from the comment cache.
+ * Removes a comment from the object cache.
  *
  * @since 2.3.0
  *
- * @param int|array $ids Comment ID or array of comment IDs to remove from cache
+ * @param int|array $ids Comment ID or an array of comment IDs to remove from cache.
  */
 function clean_comment_cache($ids) {
 	foreach ( (array) $ids as $id ) {
 		wp_cache_delete( $id, 'comment' );
+
+		/**
+		 * Fires after a comment has been removed from the object cache.
+		 *
+		 * @since 4.5.0
+		 *
+		 * @param int $id Comment ID.
+		 */
+		do_action( 'clean_comment_cache', $id );
 	}
 
 	wp_cache_set( 'last_changed', microtime(), 'comment' );