X-Git-Url: https://git.treefish.org/banana.git/blobdiff_plain/3f75cb10d008938dca476577d6256765093d1932..17d5ad30f747658451fae84fe65cb1f5b66d377c:/admin/blackboard.php

diff --git a/admin/blackboard.php b/admin/blackboard.php
index b683221..4066f84 100644
--- a/admin/blackboard.php
+++ b/admin/blackboard.php
@@ -8,6 +8,11 @@
     block("lightgreen", "added blackboard");
   }
 
+  if ($db->query("SELECT COUNT(*) FROM students")->fetch(PDO::FETCH_NUM)[0] == 0) {
+    block("red", "no students registered");
+    break;
+  }
+
   block("black", "add blackboard");
 ?>