詳解PHP 如何對接 paypal 支付

function createPayPal(){
 $shippingPrice = 2;
 $taxPrice = 0;
 $subTotal = 26;
 $item1 = new PayPalApiItem();
 $item1->setName("產(chǎn)品2")->setCurrency("USD")->setQuantity(1)->setPrice(10);
 $item2 = new PayPalApiItem();
 $item2->setName("產(chǎn)品1")->setCurrency("USD")->setQuantity(2)->setPrice(8);

 $itemList = new PayPalApiItemList();
 $itemList->addItems([$item1,$item2]);

 // Set payment details
 $details = new PayPalApiDetails();
 $details->setShipping($shippingPrice)->setTax($taxPrice)->setSubtotal($subTotal);

 // Set payment amount
 //注意，此處的subtotal，必須是產(chǎn)品數(shù)*產(chǎn)品價格，所有值必須是正確的，否則會報錯
 $total = $shippingPrice + $subTotal + $taxPrice;
 $amount = new PayPalApiAmount();
 $amount->setCurrency("USD")->setTotal($total)->setDetails($details);

 // Set transaction object
 $transaction = new PayPalApiTransaction();
 $transaction->setAmount($amount)->setItemList($itemList)->setDescription("這是交易描述")
 ->setInvoiceNumber(uniqid());//setInvoiceNumber為支付唯一標(biāo)識符,在使用時建議改成訂單號

 $payer = new PayPalApiPayer();
 $payer->setPaymentMethod('paypal');//["credit_card", "paypal"]
 $redirectUrls = new PayPalApiRedirectUrls();
 $redirectUrl = "http://test.com/redirect/success";//支付成功跳轉(zhuǎn)的回調(diào)
 $cancelUrl = "http://test.com/redirect/cancel";//取消支付的回調(diào)
 $redirectUrls->setReturnUrl($redirectUrl)->setCancelUrl($cancelUrl);

 // Create the full payment object
 $payment = new PayPalApiPayment();
 $payment->setIntent("sale")->setPayer($payer)->setRedirectUrls($redirectUrls)->addTransaction($transaction);

 try {
 $clientId = "xxxxxx";//上面應(yīng)用的clientId和secret
 $secret = "XXXXXX";
 $oAuth = new PayPalAuthOAuthTokenCredential($clientId, $secret);
 $apiContext = new PayPalRestApiContext($oAuth);
 if(env('APP_DEBUG') === false ){
 $apiContext->setConfig(['mode' => 'live']);//設(shè)置線上環(huán)境,默認(rèn)是sandbox
 }
 $payment->create($apiContext);
 $approvalUrl = $payment->getApprovalLink();
 dd($approvalUrl);//這個是請求支付的鏈接，在瀏覽器中請求此鏈接就會跳轉(zhuǎn)到支付頁面
 } catch (Exception $e) {
 dd($e->getMessage());//錯誤提示
 }
 }

function payRedirect(Request $request)
 {
 $paymentID = $request->get('paymentId');
 $payerId = $request->get('PayerID');

 $clientId = "xxxxxx";//上面應(yīng)用的clientId和secret
 $secret = "XXXXXX";
 $oAuth = new PayPalAuthOAuthTokenCredential($clientId, $secret);
 $apiContext = new PayPalRestApiContext($oAuth); 
 if(env('APP_DEBUG') === false ){
 $apiContext->setConfig(['mode' => 'live']);//設(shè)置線上環(huán)境,默認(rèn)是sandbox
 }
 $payment = PayPalApiPayment::get($paymentID, $apiContext);

 $execute = new PayPalApiPaymentExecution();
 $execute->setPayerId($payerId);

 try{
 $payment = $payment->execute($execute, $apiContext);//執(zhí)行,從paypal獲取支付結(jié)果
 $paymentState = $payment->getState();//Possible values: created, approved, failed.
 $invoiceNum = $payment->getTransactions()[0]->getInvoiceNumber();
 $payNum = $payment->getTransactions()[0]->getRelatedResources()[0]->getSale()->getId();//這是支付的流水單號，必須保存，在退款時會使用到
 $total = $payment->getTransactions()[0]->getRelatedResources()[0]->getSale()->getAmount()->getTotal();//支付總金額
 $transactionState = $payment->getTransactions()[0]->getRelatedResources()[0]->getSale()->getState();//Possible values: completed, partially_refunded, pending, refunded, denied.

 if($paymentState == 'approved' && $transactionState == 'completed'){
 //處理成功的邏輯，例如：判斷支付金額與訂單金額，更新訂單狀態(tài)等
 return "success";//返回成功標(biāo)識
 }else{
 //paypal回調(diào)錯誤,paypal狀態(tài)不正確
 return "error";//返回錯誤標(biāo)識
 }
 }catch(Exception $e){
 dd($e->getMessage());
 }
 }

function refundOrder()
 {
 try{
 $refundRequest = new PayPalApiRefundRequest();
 $amount = new PayPalApiAmount();
 $amount->setCurrency("USD")->setTotal(10);//退總金額
 $refundRequest->setAmount($amount);
 $refundRequest->setDescription("退款測試");
 $sale = new PayPalApiSale();
 $sale->setId("XXXXXXXXX");//支付單號,支付成功時保存的支付流水單號
 $clientId = "xxxxxx";//上面應(yīng)用的clientId和secret
 $secret = "XXXXXX";
 $oAuth = new PayPalAuthOAuthTokenCredential($clientId, $secret);
 $apiContext = new PayPalRestApiContext($oAuth);
 if(env('APP_DEBUG') === false ){
 $apiContext->setConfig(['mode' => 'live']);//設(shè)置線上環(huán)境,默認(rèn)是sandbox
 }
 $detailedRefund = $sale->refundSale($refundRequest, $apiContext);//調(diào)接口
 $refundState = $detailedRefund->getState();//Possible values: pending, completed, cancelled, failed.

 //var_dump($refundedSale);
 if($refundState == 'completed'){
 //退款成功,返回
 }else{
 dd('paypal 退款失敗, 狀態(tài)不正確');
 }
 }catch (Exception $exception){
 dd($exception->getMessage());//發(fā)生異常
 }
 }