From 91bc97be7b700d454c00859df6f27299ec1e05d2 Mon Sep 17 00:00:00 2001
From: ryan <ryan@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Wed, 12 Oct 2011 20:34:14 +0000
Subject: [PATCH] Allow 0 - 9 in tag_escape(). Props sirzooro. fixes #18765

git-svn-id: http://svn.automattic.com/wordpress/trunk@18955 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/formatting.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index cbf8b4ff30..f3afcfaa00 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -2440,7 +2440,7 @@ function esc_textarea( $text ) {
  * @return string
  */
 function tag_escape($tag_name) {
-	$safe_tag = strtolower( preg_replace('/[^a-zA-Z_:]/', '', $tag_name) );
+	$safe_tag = strtolower( preg_replace('/[^a-zA-Z0-9_:]/', '', $tag_name) );
 	return apply_filters('tag_escape', $safe_tag, $tag_name);
 }