define('GMO_TRIAL_MODE', true);

// A wrapper object that does everything for you.
$payment = new \GMO\ImmediatePayment();
 // Unique ID for every payment; probably should be taken from an auto-increment field from the database.
$payment->paymentId = 123;
$payment->amount = 1000;
// This card number can be used for tests.
$payment->cardNumber = '4111111111111111';
// A date in the future.
$payment->cardYear = '2020';
$payment->cardMonth = '7';
$payment->cardCode = '123';

// Returns false on an error.
if (!$payment->execute()) {
	$errors = $payment->getErrors();
	foreach ($errors as $errorCode => $errorDescription) {
        // Show an error code and a description to the customer? Your choice.
        // Probably you want to log the error too.
	}
	return;
}

// Success!
$response = $payment->getResponse();
/** @var \GMO\API\Response\ExecTranResponse $response */
// You would probably want to save the response in the database for future reference.
// The response can be used to query details about a transaction, make refunds and so on.

$payment = new \GMO\ImmediatePayment();
$payment->paymentId = 123; // Unique ID for every payment; see above
$payment->amount = 1000;
// Card details are unnecessary in this case
$payment->token = $_POST['token'];

if (!$payment->execute()) {
    // ... same as above
}

// ... same as above

$searchTrade = new \GMO\API\Call\SearchTrade();
$searchTrade->OrderID = $payment->getResponse()->OrderID;
// Copy credential from the original payment
$payment->setupOther($searchTrade);

$response = $searchTrade->dispatch();