From: Evan Prodromou <evan@status.net>
Date: Tue, 2 Aug 2011 17:49:00 +0000 (-0400)
Subject: cleanse tags of non-tag characters when canonicalizing
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=10ce44c2971f65c5fa732d91a74e3fa61d43c3bd;p=quix0rs-gnu-social.git

cleanse tags of non-tag characters when canonicalizing
---

diff --git a/lib/util.php b/lib/util.php
index e5b0c86e06..d8eee3d134 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -1096,8 +1096,11 @@ function common_tag_link($tag)
 
 function common_canonical_tag($tag)
 {
+  // only alphanum
+  $tag = preg_replace('/[^\pL\pN]/', '', $tag);
   $tag = mb_convert_case($tag, MB_CASE_LOWER, "UTF-8");
-  return str_replace(array('-', '_', '.'), '', $tag);
+  $tag = substr($tag, 0, 64);
+  return $tag;
 }
 
 function common_valid_profile_tag($str)