From 34c74ee8ce4fdeb3dd5d611a612ea7975faeb0a6 Mon Sep 17 00:00:00 2001
From: nacin <nacin@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Fri, 29 Jun 2012 19:42:27 +0000
Subject: [PATCH] Check if array key exists in wp_list_filter(). props wpsmith.
 fixes #20929.

git-svn-id: http://core.svn.wordpress.org/trunk@21184 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/functions.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 2e8752bccf..7f0fd23214 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -2402,7 +2402,7 @@ function wp_list_filter( $list, $args = array(), $operator = 'AND' ) {
 
 		$matched = 0;
 		foreach ( $args as $m_key => $m_value ) {
-			if ( $m_value == $to_match[ $m_key ] )
+			if ( array_key_exists( $m_key, $to_match ) && $m_value == $to_match[ $m_key ] )
 				$matched++;
 		}