From 6f02bf815cbf500342f97a1003229d76103b337b Mon Sep 17 00:00:00 2001
From: Dion Hulse <dd32@git.wordpress.org>
Date: Sun, 28 Mar 2010 03:10:37 +0000
Subject: [PATCH] Do not allow empty option names. Trim leading and trailing
 whitespace from option names. Partial patch props ericmann. Fixes #11506

git-svn-id: https://develop.svn.wordpress.org/trunk@13858 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/functions.php | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 4525d20ffb..751095f0ff 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -318,6 +318,10 @@ function get_option( $option, $default = false ) {
 	if ( false !== $pre )
 		return $pre;
 
+	$option = trim($option);
+	if ( empty($option) )
+		return false;
+
 	// prevent non-existent options from triggering multiple queries
 	if ( defined( 'WP_INSTALLING' ) && is_multisite() ) {
 		$notoptions = array();
@@ -488,6 +492,10 @@ function wp_load_core_site_options( $site_id = null ) {
 function update_option( $option, $newvalue ) {
 	global $wpdb;
 
+	$option = trim($option);
+	if ( empty($option) )
+		return false;
+
 	wp_protect_special_option( $option );
 
 	$newvalue = sanitize_option( $option, $newvalue );
@@ -559,10 +567,14 @@ function update_option( $option, $newvalue ) {
  * @return null returns when finished.
  */
 function add_option( $option, $value = '', $deprecated = '', $autoload = 'yes' ) {
+	global $wpdb;
+
 	if ( !empty( $deprecated ) )
 		_deprecated_argument( __FUNCTION__, '2.3' );
 
-	global $wpdb;
+	$option = trim($option);
+	if ( empty($option) )
+		return false;
 
 	wp_protect_special_option( $option );
 	$value = sanitize_option( $option, $value );