From 8cb0aad09e0c6dc0ade4bcea665074783370988c Mon Sep 17 00:00:00 2001
From: andyrandom <andyrandom@3161831.no-reply.drupal.org>
Date: Tue, 21 Jun 2016 09:34:27 +0200
Subject: [PATCH] Allow hyphens in HTML tags HFJ-1951

---
 h5p.classes.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/h5p.classes.php b/h5p.classes.php
index 93c4213..46af520 100644
--- a/h5p.classes.php
+++ b/h5p.classes.php
@@ -3414,7 +3414,7 @@ class H5PContentValidator {
       return '&lt;';
     }
 
-    if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?|(<!--.*?-->)$%', $string, $matches)) {
+    if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9\-]+)([^>]*)>?|(<!--.*?-->)$%', $string, $matches)) {
       // Seriously malformed.
       return '';
     }