From 1676bd45917fb8cfb68a18d72bbf8725f0569c8d Mon Sep 17 00:00:00 2001
From: Julio Montoya <gugli100@gmail.com>
Date: Sat, 28 Nov 2020 15:40:58 +0100
Subject: [PATCH] Minor - fix PHP warning

---
 main/exercise/admin.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/main/exercise/admin.php b/main/exercise/admin.php
index 2978f73a3c..9ba5ca63a6 100755
--- a/main/exercise/admin.php
+++ b/main/exercise/admin.php
@@ -49,7 +49,7 @@ require_once __DIR__.'/../inc/global.inc.php';
 $current_course_tool = TOOL_QUIZ;
 $this_section = SECTION_COURSES;
 
-if ($_GET['r'] == 1) {
+if (isset($_GET['r']) && 1 == $_GET['r']) {
     Exercise::cleanSessionVariables();
 }