From 4569581d73ac103577da63ae5888be6ae947f1f9 Mon Sep 17 00:00:00 2001
From: Mark Jaquith <markjaquith@git.wordpress.org>
Date: Thu, 30 Apr 2009 23:52:32 +0000
Subject: [PATCH] Exclamation mark is a valid and safe character in a URI.
 props hakre. fixes #8904

git-svn-id: https://develop.svn.wordpress.org/trunk@11147 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/pluggable.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php
index 96241273a7..67c3a9d9d9 100644
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -876,7 +876,7 @@ if ( !function_exists('wp_sanitize_redirect') ) :
  * @return string redirect-sanitized URL
  **/
 function wp_sanitize_redirect($location) {
-	$location = preg_replace('|[^a-z0-9-~+_.?#=&;,/:%]|i', '', $location);
+	$location = preg_replace('|[^a-z0-9-~+_.?#=&;,/:%!]|i', '', $location);
 	$location = wp_kses_no_null($location);
 
 	// remove %0d and %0a from location