X-Git-Url: https://git.treefish.org/banana.git/blobdiff_plain/e9f2c65e4da44066cf3af72622127eaf2ea61909..311a7991e63b57767d675dda37476a0cbd2bb0d8:/admin/blackboard.php

diff --git a/admin/blackboard.php b/admin/blackboard.php
index a28d8dc..6571f39 100644
--- a/admin/blackboard.php
+++ b/admin/blackboard.php
@@ -3,7 +3,7 @@
   require 'include/db.inc';
   require 'include/common.inc';
   
-  if($_GET['mnumber']!="" &&
+  if( isset($_GET['mnumber']) &&
      $db->query("SELECT COUNT(*) FROM students WHERE mnumber=" . trim($_GET['mnumber']) . " AND lastblackboard=" . trim($_GET['tstamp']))->fetch(PDO::FETCH_NUM)[0] == 0) {
      
     if( $_GET['sign'] == 0 ) {