From c0892fbaf0ad5d0e356941007d323630acd8702d Mon Sep 17 00:00:00 2001
From: duck_ <duck_@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Fri, 2 Mar 2012 21:57:03 +0000
Subject: [PATCH] Prevent notices by checking if the $group key isset(). See
 #20004.

git-svn-id: http://svn.automattic.com/wordpress/trunk@20091 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/cache.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-includes/cache.php b/wp-includes/cache.php
index 232bf735cd..bb61249cfb 100644
--- a/wp-includes/cache.php
+++ b/wp-includes/cache.php
@@ -534,7 +534,7 @@ class WP_Object_Cache {
 	 * @access private
 	 */
 	protected function _exists($key, $group) {
-		return is_array( $this->cache[$group] ) && array_key_exists( $key, $this->cache[$group] );
+		return isset( $this->cache[$group] ) && is_array( $this->cache[$group] ) && array_key_exists( $key, $this->cache[$group] );
 	}
 
 	/**