From 30c6bf1b9560e13003933ce00bc1d7e9d11a68db Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Fri, 4 May 2018 22:54:48 +0200
Subject: [PATCH] ipl: relax attribute name checks

---
 library/vendor/ipl/Html/Attribute.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/vendor/ipl/Html/Attribute.php b/library/vendor/ipl/Html/Attribute.php
index 69a7e986..d8ac9a5c 100644
--- a/library/vendor/ipl/Html/Attribute.php
+++ b/library/vendor/ipl/Html/Attribute.php
@@ -58,7 +58,7 @@ class Attribute
      */
     public function setName($name)
     {
-        if (! preg_match('/^[a-z][a-z:-]*$/i', $name)) {
+        if (! preg_match('/^[a-z][a-z0-9:-]*$/i', $name)) {
             throw new ProgrammingError(
                 'Attribute names with special characters are not yet allowed: %s',
                 $name