Analysis of the mall Alipay integration method developed using PHP

Analysis of Alipay integration method for shopping malls developed using PHP

Introduction
With the rapid development of e-commerce, Alipay has become one of the most popular and used online payment platforms in China. Whether you are an individual or a business, you can use Alipay to achieve fast and safe payment. For developers, how to integrate Alipay into their own mall systems has become an important issue. This article will introduce the mall Alipay integration method developed based on PHP to help developers easily implement payment functions.

Alipay integration preparation work
Before starting to integrate Alipay, we first need to apply for an Alipay developer account and create an application to obtain the necessary parameters. The specific steps are as follows:

1. Log in to the Alipay open platform (https://open.alipay.com), or if you do not have an account, register first.
2. After logging in, click Application Management on the Developer Center page, and then click Create Application.
3. On the application creation page, fill in the application name, application type, application homepage and other information, and check the corresponding permissions.
4. After successful creation, you can find key information such as AppID, developer key, and Alipay public key on the application details page.

Alipay integration steps
1. Integrate Alipay SDK
First, we need to download and introduce the SDK officially provided by Alipay. This SDK encapsulates the Alipay interface to facilitate our payment function. transfer. The specific steps are as follows:

1. Download the SDK compressed package (alipay-sdk-PHP-20180705.zip), and then extract it to the project directory.
2. Introduce the core file AlipayTradeService.php of the SDK into the project:

require_once 'alipay-sdk-PHP-20180705/AopSdk.php';
include_once 'alipay-sdk-PHP-20180705/AlipayTradeService.php';

2. Generate Alipay order
After the user clicks the payment button, we need to generate an Alipay order and Display it to the user so they can pay. The specific steps are as follows:

1. Define the required parameters in the background, such as merchant order number, total order amount, order title, etc.:

$outTradeNo = '商户订单号';
$totalAmount = '订单总金额';
$subject = '订单标题';

2. Instantiate the order class , and set relevant parameters:

$payRequestBuilder = new AlipayTradePrecreateContentBuilder();
$payRequestBuilder->setSubject($subject);
$payRequestBuilder->setTotalAmount($totalAmount);
$payRequestBuilder->setOutTradeNo($outTradeNo);

3. Instantiate the Alipay service class, and call the generate order method:

$alipayTradeService = new AlipayTradeService();
$result = $alipayTradeService->precreate($payRequestBuilder);
$response = $result->getResponse();

4. Process according to the returned result, You can get the processing result code through $response->code. If it is 10000, it means the order is generated successfully. You can get the QR code link:

if (!empty($response) && $response->code == "10000") {
    $qrCode = $response->qr_code;
}

3. Display the Alipay QR code
After generating an Alipay order and obtaining the QR code link, we need to generate the QR code from the link and display it to the user so that the user can make payment. The specific steps are as follows:

1. Introduce the third-party library phpqrcode.php into the project, and call the library to generate the QR code:

include_once 'phpqrcode.php';
QRcode::png($qrCode);

2. The generated QR code The QR code link is sent to the user for display.

4. Processing payment results
After the user's payment is completed, we need to process the payment results in a timely manner and return the corresponding results to Alipay so that Alipay can notify us of the final status of the order. The specific steps are as follows:

1. Instantiate the Alipay service class and call the query order method:

$queryRequestBuilder = new AlipayTradeQueryContentBuilder();
$queryRequestBuilder->setOutTradeNo($outTradeNo);
$queryResult = $alipayTradeService->query($queryRequestBuilder);
$response = $queryResult->getResponse();

2. Process according to the query results, which can be based on $response-> ;trade_status determines the final status of the order, such as TRADE_SUCCESS, TRADE_CLOSED, etc.

Conclusion
Through the above steps, we can easily integrate the Alipay payment function into our mall system. Alipay provides a wealth of SDKs and APIs to facilitate developers for secondary development and customization. I hope this article will help you understand and use the mall Alipay integration method developed with PHP.

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