<?php
ob_start();
include('dbconnect.php');
session_start();
$user_check=$_SESSION['login_user'];

$sql = $db->prepare("SELECT * FROM students WHERE username=?");
$sql->execute(array($user_check));
$row = $sql->fetch(PDO::FETCH_ASSOC);

$login_session=$row['username'];
$login_id=$row['id'];

if(!isset($login_session))
{
header("Location: login.php");
}
?>