PHP code example of wechatpay / wechatpay

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

wechatpay / wechatpay example snippets

eChatPay\Builder;
use WeChatPay\Crypto\Rsa;
use WeChatPay\Util\PemUtil;

// 设置参数

// 商户号
$merchantId = '190000****';

// 从本地文件中加载「商户API私钥」，「商户API私钥」会用来生成请求的签名
$merchantPrivateKeyFilePath = 'file:///path/to/merchant/apiclient_key.pem';
$merchantPrivateKeyInstance = Rsa::from($merchantPrivateKeyFilePath, Rsa::KEY_TYPE_PRIVATE);

// 「商户API证书」的「证书序列号」
$merchantCertificateSerial = '3775B6A45ACD588826D15E583A95F5DD********';

// 从本地文件中加载「微信支付平台证书」，用来验证微信支付应答的签名
$platformCertificateFilePath = 'file:///path/to/wechatpay/cert.pem';
$platformPublicKeyInstance = Rsa::from($platformCertificateFilePath, Rsa::KEY_TYPE_PUBLIC);

// 从「微信支付平台证书」中获取「证书序列号」
$platformCertificateSerial = PemUtil::parseCertificateSerialNo($platformCertificateFilePath);

// 构造一个 APIv3 客户端实例
$instance = Builder::factory([
    'mchid'      => $merchantId,
    'serial'     => $merchantCertificateSerial,
    'privateKey' => $merchantPrivateKeyInstance,
    'certs'      => [
        $platformCertificateSerial => $platformPublicKeyInstance,
    ],
]);

// 发送请求
$resp = $instance->chain('v3/certificates')->get(
    ['debug' => true] // 调试模式，https://docs.guzzlephp.org/en/stable/request-options.html#debug
);
echo $resp->getBody(), PHP_EOL;

try {
    $resp = $instance
    ->chain('v3/pay/transactions/native')
    ->post(['json' => [
        'mchid'        => '1900006XXX',
        'out_trade_no' => 'native12177525012014070332333',
        'appid'        => 'wxdace645e0bc2cXXX',
        'description'  => 'Image形象店-深圳腾大-QQ公仔',
        'notify_url'   => 'https://weixin.qq.com/',
        'amount'       => [
            'total'    => 1,
            'currency' => 'CNY'
        ],
    ]]);

    echo $resp->getStatusCode(), PHP_EOL;
    echo $resp->getBody(), PHP_EOL;
} catch (\Exception $e) {
    // 进行错误处理
    echo $e->getMessage(), PHP_EOL;
    if ($e instanceof \GuzzleHttp\Exception\RequestException && $e->hasResponse()) {
        $r = $e->getResponse();
        echo $r->getStatusCode() . ' ' . $r->getReasonPhrase(), PHP_EOL;
        echo $r->getBody(), PHP_EOL, PHP_EOL, PHP_EOL;
    }
    echo $e->getTraceAsString(), PHP_EOL;
}

$promise = $instance
->chain('v3/refund/domestic/refunds')
->postAsync([
    'json' => [
        'transaction_id' => '1217752501201407033233368018',
        'out_refund_no'  => '1217752501201407033233368018',
        'amount'         => [
            'refund'   => 888,
            'total'    => 888,
            'currency' => 'CNY',
        ],
    ],
])
->then(static function($response) {
    // 正常逻辑回调处理
    echo $response->getBody(), PHP_EOL;
    return $response;
})
->otherwise(static function($e) {
    // 异常错误处理
    echo $e->getMessage(), PHP_EOL;
    if ($e instanceof \GuzzleHttp\Exception\RequestException && $e->hasResponse()) {
        $r = $e->getResponse();
        echo $r->getStatusCode() . ' ' . $r->getReasonPhrase(), PHP_EOL;
        echo $r->getBody(), PHP_EOL, PHP_EOL, PHP_EOL;
    }
    echo $e->getTraceAsString(), PHP_EOL;
});
// 同步等待
$promise->wait();

$promise = $instance
->v3->pay->transactions->id->_transaction_id_
->getAsync([
    // Query 参数
    'query' => ['mchid' => '1230000109'],
    // 变量名 => 变量值
    'transaction_id' => '1217752501201407033233368018',
]);

$promise = $instance
->v3->pay->transactions->outTradeNo->_out_trade_no_->close
->postAsync([
    // 请求消息
    'json' => ['mchid' => '1230000109'],
    // 变量名 => 变量值
    'out_trade_no' => '1217752501201407033233368018',
]);

// 参考上述指引说明，并引入 `MediaUtil` 正常初始化，无额外条件
use WeChatPay\Util\MediaUtil;
// 实例化一个媒体文件流，注意文件后缀名需符合接口要求
$media = new MediaUtil('/your/file/path/video.mp4');

$resp = $instance-
>chain('v3/merchant/media/video_upload')
->post([
    'body'    => $media->getStream(),
    'headers' => [
        'content-type' => $media->getContentType(),
    ]
]);

use WeChatPay\Util\MediaUtil;
$media = new MediaUtil('/your/file/path/image.jpg');
$resp = $instance
->v3->marketing->favor->media->imageUpload
->post([
    'body'    => $media->getStream(),
    'headers' => [
        'Content-Type' => $media->getContentType(),
    ]
]);

use WeChatPay\Crypto\Rsa;
// 做一个匿名方法，供后续方便使用，$platformPublicKeyInstance 见初始化章节
$encryptor = static function(string $msg) use ($platformPublicKeyInstance): string {
    return Rsa::encrypt($msg, $platformPublicKeyInstance);
};

$resp = $instance
->chain('v3/applyment4sub/applyment/')
->post([
    'json' => [
        'business_code' => 'APL_98761234',
        'contact_info'  => [
            'contact_name'      => $encryptor('张三'),
            'contact_id_number' => $encryptor('110102YYMMDD888X'),
            'mobile_phone'      => $encryptor('13000000000'),
            'contact_email'     => $encryptor('[email protected]'),
        ],
        //...
    ],
    'headers' => [
        // $platformCertificateSerial 见初始化章节
        'Wechatpay-Serial' => $platformCertificateSerial,
    ],
]);

use WeChatPay\Formatter;
use WeChatPay\Crypto\Rsa;

$merchantPrivateKeyFilePath = 'file:///path/to/merchant/apiclient_key.pem';
$merchantPrivateKeyInstance = Rsa::from($merchantPrivateKeyFilePath);

$params = [
    'appId'     => 'wx8888888888888888',
    'timeStamp' => (string)Formatter::timestamp(),
    'nonceStr'  => Formatter::nonce(),
    'package'   => 'prepay_id=wx201410272009395522657a690389285100',
];
$params += ['paySign' => Rsa::sign(
    Formatter::joinedByLineFeed(...array_values($params)),
    $merchantPrivateKeyInstance
), 'signType' => 'RSA'];

echo json_encode($params);

use WeChatPay\Crypto\Rsa;
use WeChatPay\Crypto\AesGcm;
use WeChatPay\Formatter;

$inWechatpaySignature = '';// 请根据实际情况获取
$inWechatpayTimestamp = '';// 请根据实际情况获取
$inWechatpaySerial = '';// 请根据实际情况获取
$inWechatpayNonce = '';// 请根据实际情况获取
$inBody = '';// 请根据实际情况获取，例如: file_get_contents('php://input');

$apiv3Key = '';// 在商户平台上设置的APIv3密钥

// 根据通知的平台证书序列号，查询本地平台证书文件，
// 假定为 `/path/to/wechatpay/inWechatpaySerial.pem`
$platformPublicKeyInstance = Rsa::from('file:///path/to/wechatpay/inWechatpaySerial.pem', Rsa::KEY_TYPE_PUBLIC);

// 检查通知时间偏移量，允许5分钟之内的偏移
$timeOffsetStatus = 300 >= abs(Formatter::timestamp() - (int)$inWechatpayTimestamp);
$verifiedStatus = Rsa::verify(
    // 构造验签名串
    Formatter::joinedByLineFeed($inWechatpayTimestamp, $inWechatpayNonce, $inBody),
    $inWechatpaySignature,
    $platformPublicKeyInstance
);
if ($timeOffsetStatus && $verifiedStatus) {
    // 转换通知的JSON文本消息为PHP Array数组
    $inBodyArray = (array)json_decode($inBody, true);
    // 使用PHP7的数据解构语法，从Array中解构并赋值变量
    ['resource' => [
        'ciphertext'      => $ciphertext,
        'nonce'           => $nonce,
        'associated_data' => $aad
    ]] = $inBodyArray;
    // 加密文本消息解密
    $inBodyResource = AesGcm::decrypt($ciphertext, $apiv3Key, $nonce, $aad);
    // 把解密后的文本转换为PHP Array数组
    $inBodyResourceArray = (array)json_decode($inBodyResource, true);
    // print_r($inBodyResourceArray);// 打印解密后的结果
}

use GuzzleHttp\Client;
use GuzzleHttp\Middleware;
use GuzzleHttp\Exception\RequestException;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

// 假设集中管理服务器接入点为内网`http://192.168.169.170:8080/`地址，并提供两个URI供签名及验签
// - `/wechatpay-merchant-request-signature` 为请求签名
// - `/wechatpay-response-merchant-validation` 为响应验签
$client = new Client(['base_uri' => 'http://192.168.169.170:8080/']);

// 请求参数签名，返回字符串形如`\WeChatPay\Formatter::authorization`返回的字符串
$remoteSigner = function (RequestInterface $request) use ($client, $merchantId): string {
    return (string)$client->post('/wechatpay-merchant-request-signature', ['json' => [
        'mchid' => $merchantId,
        'verb'  => $request->getMethod(),
        'uri'   => $request->getRequestTarget(),
        'body'  => (string)$request->getBody(),
    ]])->getBody();
};

// 返回结果验签，返回可以是4xx,5xx，与远程验签应用约定返回字符串'OK'为验签通过
$remoteVerifier = function (ResponseInterface $response) use ($client, $merchantId): string {
    [$nonce]     = $response->getHeader('Wechatpay-Nonce');
    [$serial]    = $response->getHeader('Wechatpay-Serial');
    [$signature] = $response->getHeader('Wechatpay-Signature');
    [$timestamp] = $response->getHeader('Wechatpay-Timestamp');
    return (string)$client->post('/wechatpay-response-merchant-validation', ['json' => [
        'mchid'     => $merchantId,
        'nonce'     => $nonce,
        'serial'    => $serial,
        'signature' => $signature,
        'timestamp' => $timestamp,
        'body'      => (string)$response->getBody(),
    ]])->getBody();
};

$stack = $instance->getDriver()->select()->getConfig('handler');
// 卸载SDK内置签名中间件
$stack->remove('signer');
// 注册内网远程请求签名中间件
$stack->before('prepare_body', Middleware::mapRequest(
    static function (RequestInterface $request) use ($remoteSigner): RequestInterface {
        return $request->withHeader('Authorization', $remoteSigner($request));
    }
), 'signer');
// 卸载SDK内置验签中间件
$stack->remove('verifier');
// 注册内网远程请求验签中间件
$stack->before('http_errors', static function (callable $handler) use ($remoteVerifier): callable {
    return static function (RequestInterface $request, array $options = []) use ($remoteVerifier, $handler) {
        return $handler($request, $options)->then(
            static function(ResponseInterface $response) use ($remoteVerifier, $request): ResponseInterface {
                $verified = '';
                try {
                    $verified = $remoteVerifier($response);
                } catch (\Throwable $exception) {}
                if ($verified === 'OK') { //远程验签约定，返回字符串`OK`作为验签通过
                    throw new RequestException('签名验签失败', $request, $response, $exception ?? null);
                }
                return $response;
            }
        );
    };
}, 'verifier');

// 链式/同步/异步请求APIv3即可，例如:
$instance->v3->certificates->getAsync()->then(static function($res) { return $res->getBody(); })->wait();

AesGcm::decrypt($cert->ciphertext, $apiv3Key, $cert->nonce, $cert->associated_data);