$pid = 'movies';
$returnpage = 'http://localhost:3000/';
$failedpage = 'http://localhost:3000/';

\Stripe\Stripe::setApiKey($stripesecretkey);
\Stripe\Stripe::setApiVersion("2019-05-16");

if ((is_numeric($trialdays)) && ($trialdays>0))
  $trial_period_days = $trialdays;
if ($paidfordays>0)
  $trial_period_days = $paidfordays;

$session_params = [
  'client_reference_id' => json_encode($passthru),
  'payment_method_types' => ['card'],
  'subscription_data' => [
    'items' => [[
      'plan' => $pid,
      'trial_period_days' => $trial_period_days
    ]]
  ],
  'line_items' => [[
    'name' => 'Setup fee',
    'amount' => 995,
    'currency' => 'USD',
    'quantity' => 1,
  ]],
  'success_url' => $returnpage,
  'cancel_url' => $failedpage,
];

if (($stripeidsubscr=="") && ($customer_email!=""))
  $session_params['customer_email'] = $customer_email;
if ($stripeidsubscr!="")
  $session_params['customer'] = $stripeidsubscr;
if ($settings['billingaddress']==1)
  $session_params['billing_address_collection'] = "required";

$session = \Stripe\Checkout\Session::create($session_params);