// --------------------
// LOAD STRIPE SDK (vendor OR local)
// --------------------
$autoload = __DIR__ . '/vendor/autoload.php';
$manual   = __DIR__ . '/stripe-php/init.php';

if (is_file($autoload)) {
  require_once $autoload;
} elseif (is_file($manual)) {
  require_once $manual;
} else {
  http_response_code(500);
  echo json_encode([
    'error' => 'Stripe SDK missing on server.',
    'need_one_of' => [
      $autoload,
      $manual
    ]
  ], JSON_UNESCAPED_SLASHES);
  exit;
}