From 2aa3f3c35319e1af79fb8351ceb826e29fefb23a Mon Sep 17 00:00:00 2001
From: Mark Jaquith <markjaquith@git.wordpress.org>
Date: Thu, 29 Sep 2011 02:23:26 +0000
Subject: [PATCH] Add note about why double-serialization is done. props
 SergeyBiryukov. fixes #16597

git-svn-id: https://develop.svn.wordpress.org/trunk@18807 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/functions.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index e9044cda06..aaa5cc45cc 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -1037,6 +1037,8 @@ function maybe_serialize( $data ) {
 	if ( is_array( $data ) || is_object( $data ) )
 		return serialize( $data );
 
+	// Double serialization is required for backward compatibility.
+	// See http://core.trac.wordpress.org/ticket/12930
 	if ( is_serialized( $data ) )
 		return serialize( $data );