İyzico paketini kullanman lazım gerisi de kısaca böyle
public function retrieveCheckoutForm($token)
{
$request = new RetrieveCheckoutFormRequest();
$request->setLocale(Locale::TR);
$request->setToken($token);
$checkoutForm = CheckoutForm::retrieve($request, $this->options);
return $checkoutForm;
}
$response = $this->retrieveCheckoutForm->retrieveCheckoutForm($request->get('token'));
if ($response->getStatus() == 'success' and $response->getPaymentStatus() == 'SUCCESS') {