session_start();
                if($_SERVER["REQUEST_METHOD"] == "POST")
                {

                  $username = mysqli_real_escape_string($link,$_POST['email']);
                  $password = mysqli_real_escape_string($link,$_POST['pwd']);
                  $id=mysqli_query($link, "SELECT id_client FROM client,`login`
                  WHERE  client.email='$email' AND client.id_client=`login.id_client` AND `login.password`=$password;");
                  echo $id;
                  $row = mysqli_fetch_array($id,MYSQLI_ASSOC);
                  $active = $row['active'];
                  $count = mysqli_num_rows($id);
                  if($count == 1) {
                    echo udalosie;
                    session_register("username");
                    $_SESSION['login_user'] = $myusername;

                    header("location: welcome.php");
                 }else {
                   echo nie;
                    $error = "Bledny login lub haslo";
                 }
                }