How to access Alipay in ThinkPHP application

ThinkPHP is a common PHP application framework that can help developers quickly build and develop Web applications. Alipay is a widely used online payment platform, which provides users and merchants with a convenient, safe and fast payment method. In this article, we will introduce how to access Alipay in ThinkPHP applications.

Step 1: Download Alipay SDK

First, we need to download Alipay SDK. Alipay provides a PHP version of the SDK, and we can download the latest version of the SDK file on the official website. After the download is complete, we can unzip the SDK file into the application's vendor directory to facilitate the use of the SDK.

Step 2: Configure Alipay parameters

Before configuring Alipay parameters, we need to register a merchant account on the official Alipay website and obtain the merchant’s AppId, merchant private key, and Alipay public key. keys and other key information. This information will be used to call Alipay API in the application. The steps to configure Alipay parameters are as follows:

1. Open the application's configuration file config.php and add the following code to the end of the file:

// 支付宝参数配置
'alipay' => [
    'app_id' => '您的AppId',
    'ali_public_key' => '支付宝公钥',
    'private_key' => '商户私钥',
],

2. Submit it to Alipay's order data is encrypted and a signature is generated. Write the following code in the controller to pass the order data and signature to the front end:

use think\helper\Hash;
use think\Request;

$request = Request::instance();
$data = [
    'out_trade_no' => '20180101000001', // 商户订单号
    'total_amount' => '0.01', // 订单金额
    'subject' => '测试订单', // 订单标题
    'body' => '测试订单详情', // 订单详情
];
$sign = Hash::make($data, 'md5', false); // 对订单数据进行加密

$this->assign('data', json_encode($data)); // 将订单数据传递给前端
$this->assign('sign', $sign); // 将签名传递给前端

Step 3: Call Alipay API

After configuring Alipay parameters, we can use Function in Alipay SDK to call Alipay API. For example, we can use the "unified acquiring transaction payment interface" provided by Alipay to complete Alipay's payment function. The steps to call Alipay API are as follows:

1. Write the following code in the controller to pass the order data and signature to the front end:

use think\helper\Hash;
use think\Request;

$request = Request::instance();
$data = [
    'out_trade_no' => '20180101000001', // 商户订单号
    'total_amount' => '0.01', // 订单金额
    'subject' => '测试订单', // 订单标题
    'body' => '测试订单详情', // 订单详情
];
$sign = Hash::make($data, 'md5', false); // 对订单数据进行加密

$this->assign('data', json_encode($data)); // 将订单数据传递给前端
$this->assign('sign', $sign); // 将签名传递给前端

2. Write the following code in the front end Code, use JavaScript to call Alipay API:

<script>
    // 创建form表单
    function createForm(url, data, target) {
        var form = document.createElement(&#39;form&#39;);
        form.action = url;
        form.method = &#39;POST&#39;;
        form.target = target;
        for (var key in data) {
            var input = document.createElement(&#39;input&#39;);
            input.name = key;
            input.value = data[key];
            form.appendChild(input);
        }
        return form;
    }

    // 提交form表单
    function submitForm(url, data, target) {
        var form = createForm(url, data, target);
        document.body.appendChild(form);
        form.submit();
    }

    // 发起支付宝支付
    function alipay() {
        var data = JSON.parse(&#39;<?php echo $data; ?>&#39;);
        data[&#39;sign&#39;] = &#39;<?php echo $sign; ?>&#39;;
        var url = &#39;https://openapi.alipay.com/gateway.do&#39;;
        var target = &#39;_blank&#39;;
        submitForm(url, data, target);
    }
</script>

Through the above steps, we can complete the process of installing Alipay in the ThinkPHP application. Developers can add more functions to the application according to their own needs and integrate Alipay payment into their own business processes, thereby improving the user's payment experience.

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