<?php
    if (isset($_SESSION['teacherusername']))
    {
        $username = $_SESSION['teacherusername'];
    }
?>

<?php
  // PHP code
  session_start();

    ini_set('display_errors',1);
 error_reporting(E_ALL);

// connect to the database
include('connect.php');
include('member.php');

  /* check connection */
  if (mysqli_connect_errno()) {
    printf("Connect failed: %sn", mysqli_connect_error());
    die();
  }

  // required variables (make them explciit no need for foreach loop)
  $teacherusername = (isset($_POST['teacherusername'])) ? $_POST['teacherusername'] : '';
  $teacherpassword = (isset($_POST['teacherpassword'])) ? $_POST['teacherpassword'] : '';
  $loggedIn = false;
  $active = true;

  if ($username){
      echo "You are already Logged In: <b>{$_SESSION['teacherforename']} {$_SESSION['teachersurname']}</b> | <a href='./teacherlogout.php'>Logout</a>";
  }
  else{

echo "Please Login";

}

?>

$username = "";
if (isset($_SESSION['teacherusername'])) {
    $username = $_SESSION['teacherusername'];
}

$username = $_SESSION['teacherusername'];
}

$username = null; // ad this line to member.php
if (isset($_SESSION['teacherusername'])) {
   $username = $_SESSION['teacherusername'];