PayPal\Api\Payment::setIntent PHP Method

    public function setIntent($intent)
    {
        $this->intent = $intent;
        return $this;
    }

function CreateTransaction($transactionType, $itemArray, $details)
{
    $payer = new Payer();
    $payer->setPaymentMethod($GLOBALS['PAYPAL']['payment_method']);
    $itemList = new ItemList();
    $itemList->setItems($itemArray);
    $amount = new Amount();
    $amount->setCurrency($GLOBALS['PAYPAL']['currency'])->setTotal(GetDetailsTotal($details))->setDetails($details);
    $transaction = new Transaction();
    $transaction->setAmount($amount)->setItemList($itemList)->setDescription($GLOBALS['TRANSACTION_TYPE']['DONATION']['payment_desc'])->setInvoiceNumber(uniqid());
    $redirectUrls = new RedirectUrls();
    $redirectUrls->setReturnUrl($GLOBALS['TRANSACTION_TYPE']['DONATION']['return_url'])->setCancelUrl($GLOBALS['TRANSACTION_TYPE']['DONATION']['cancel_url']);
    $payment = new Payment();
    $payment->setIntent($GLOBALS['TRANSACTION_TYPE']['DONATION']['intent'])->setPayer($payer)->setRedirectUrls($redirectUrls)->setTransactions(array($transaction));
    $request = clone $payment;
    try {
        $payment->create($GLOBALS['PAYPAL']['api_context']);
    } catch (Exception $ex) {
        ResultPrinter::printError("Created Payment Using PayPal. Please visit the URL to Approve.", "Payment", null, $request, $ex);
        return false;
    }
    $approvalUrl = $payment->getApprovalLink();
    echo $approvalUrl;
    return array('request' => $request, 'payment' => $payment, 'approvalUrl' => $approvalUrl);
}