From 58e0851786e972f142ef6bdfdd21b792480cdd0b Mon Sep 17 00:00:00 2001
From: markjaquith <markjaquith@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
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: http://svn.automattic.com/wordpress/trunk@18807 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/functions.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index e9044cda0..aaa5cc45c 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 );