fix a bit

insert.php

@@ -8,7 +8,7 @@ include_once "dbconnection.php";
 $query = "INSERT INTO toDoList (task, userID) VALUES (?,?) ";
 
 //prepare empty values as placeholders
-$query = $link->prepare($query1);
+$query = $link->prepare($query);
 
 //bind variables to the prepared query
 $query -> bind_param('si', $_POST['task'], $_SESSION['id']);