public static function createFundingInstrument()
 {
     $fi = new FundingInstrument();
     $fi->setCredit_card(CreditCardTest::createCreditCard());
     $fi->setCredit_card_token(CreditCardTokenTest::createCreditCardToken());
     return $fi;
 }
use PayPal\Auth\OAuthTokenCredential;
use PayPal\Rest\ApiContext;
// ### Credit card token
// Saved credit card id from a previous call to
// CreateCreditCard.php
$creditCardId = 'CARD-5BT058015C739554AKE2GCEI';
$creditCardToken = new CreditCardToken();
$creditCardToken->setCredit_card_id($creditCardId);
// ### FundingInstrument
// A resource representing a Payer's funding instrument.
// Use a Payer ID (A unique identifier of the payer generated
// and provided by the facilitator. This is required when
// creating or using a tokenized funding instrument)
// and the `CreditCardDetails`
$fi = new FundingInstrument();
$fi->setCredit_card_token($creditCardToken);
// ### Payer
// A resource representing a Payer that funds a payment
// Use the List of `FundingInstrument` and the Payment Method
// as 'credit_card'
$payer = new Payer();
$payer->setPayment_method("credit_card");
$payer->setFunding_instruments(array($fi));
// ### Amount
// Let's you specify a payment amount.
$amount = new Amount();
$amount->setCurrency("USD");
$amount->setTotal("1.00");
// ### Transaction
// A transaction defines the contract of a
// payment - what is the payment for and who