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[banana.git] / admin / blackboard.php

diff --git a/admin/blackboard.php b/admin/blackboard.php
index a28d8dc69cb250fbfd8a729c0d519111410b0405..6571f3928b24c2711bf45e49c9af4de8ddd8bcb0 100644 (file)
--- 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 ) {