From 71ae822c8a55daa6fdc295d7a9da9096b4e19e80 Mon Sep 17 00:00:00 2001
From: moodler <moodler>
Date: Fri, 16 Jul 2004 13:26:46 +0000
Subject: [PATCH] MOre robust handling of the $lang variable

---
 lib/setup.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/setup.php b/lib/setup.php
index ecce1a2226e..eb7d17d2b3a 100644
--- a/lib/setup.php
+++ b/lib/setup.php
@@ -218,8 +218,10 @@
 /// majority of cases), use the stored locale specified by admin.
 
     if (isset($_GET['lang'])) {
-        $SESSION->lang = $lang;
-        $SESSION->encoding = get_string('thischarset');
+        if (!detect_munged_arguments($lang) and file_exists("$CFG->dirroot/lang/$lang")) {
+            $SESSION->lang = $lang;
+            $SESSION->encoding = get_string('thischarset');
+        }
     }
     if (empty($CFG->lang)) {
         $CFG->lang = "en";