<form class="user" action="code.php" method="POST">
                                <div class="form-group">
                                    <input type="email" class="form-control form-control-user"  name="email" placeholder="Enter Email Address...">
                                </div>
                                <div class="form-group">
                                    <input type="password" class="form-control form-control-user"  name="password" placeholder="Password">
                                </div>

                                <button type="submit" name="login_btn" class="btn btn-primary btn-user btn-block">
                                    Login
                                </button>
                                <hr>

                            </form>

if(isset($_POST['login_btn'])) {

    $password_login = $_POST['password'];
    $email_login = $_POST['email'];
$query="select * from register where email='$email_login' and password='$password_login'";

$query_run=mysqli_query($cnx,$query);
$usertypes=mysqli_fetch_array($query_run);

if( $usertypes['usertype'] == "admin")
    {
     $_SESSION['username']=$email_login;

     header('Location: index.php');


    }
    else if($usertypes['usertype'] == "user")
    {
        $_SESSION['username']=$email_login;

        header('Location: ../index.php');
    }
    else{


        $_SESSION['status']='Login or password is wrong ! Try again ';
        header('Location: login.php');


    }



}