前置条件

已有商户号、商户私钥(APIv2也叫证书密钥，文件名：apiclient_key.pem)、商户证书(文件名：apiclient_cert.pem)，已开通企业微信产品功能，并关联了企业微信号，详细开通并关联说明点这里。

安装软件

composer require wechatpay/wechatpay

工厂方法创建一个APIv2的实例

从工厂方法创建一个实例，APIv3的参数随便填，保证mchid,secret,merchant[cert]及merchant[key]正确即可，例如：

use WeChatPay\Builder;
use WeChatPay\Formatter;
use WeChatPay\Transformer;
use WeChatPay\Crypto\Hash;
use GuzzleHttp\Promise\PromiseInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

$instance = Builder::factory([
    'mchid' => '1234567',
    'serial' => 'noop',
    'privateKey' => 'noop',
    'certs' => ['any' => null],
    'secret' => 'abcdefg',
    'merchant' => [
        'cert' => $merchantCertFile,
        'key' => $merchantPrivateKeyFile,
    ],
]);

加入企业微信专属签名函数中间件

$agentId = 1001;
$agentSecret = 'abcdefgshad';

/** @var \GuzzleHttp\HandlerStack $handler */
$handler = $instance->getDriver()->select('v2')->getConfig('handler');
$handler->before('transform_request', static function($handler) use ($agentSecret, $agentId): callable {
    return static function(RequestInterface $request, array $options = []) use($handler, $agentSecret, $agentId): PromiseInterface {
        $actName     = $options['xml']['act_name']     ?? null;
        $mchBillno   = $options['xml']['mch_billno']   ?? null;
        $mchId       = $options['xml']['mch_id']       ?? null;
        $nonceStr    = $options['xml']['nonce_str']    ?? Formatter::nonce();
        $reOpenid    = $options['xml']['re_openid']    ?? null;
        $totalAmount = $options['xml']['total_amount'] ?? null;
        $wxappid     = $options['xml']['wxappid']      ?? null;

        if ($actName && $mchBillno && $mchId && $nonceStr && $reOpenid && $totalAmount && $wxappid) {
            $options['xml']['workwx_sign'] = strtoupper(Hash::md5(
                Formatter::queryStringLike(Formatter::ksort([
                    'act_name'     => $actName,
                    'mch_billno'   => $mchBillno,
                    'mch_id'       => $mchId,
                    'nonce_str'    => $nonceStr,
                    're_openid'    => $reOpenid,
                    'total_amount' => $totalAmount,
                    'wxappid'      => $wxappid,
                ]))
                , $agentSecret
                , $agentId
            ));
        }

        return $handler($request, $options);
    };
}, 'workwxredpack');

发放企业红包

$res = $instance->v2->mmpaymkttransfers->sendworkwxredpack->postAsync([
    'security' => true,
    'xml' => [
        'mch_id'       => '1234567',
        'act_name'     => 'test',
        'mch_billno'   => 'test1',
        're_openid'    => '111',
        'total_amount' => '1',
        'wxappid'      => '111',
    ],
    // 'debug' => true,
])
->then(static function($res) { return Transformer::toArray($res->getBody()->getContents()); })
->otherwise(static function($res) { return Transformer::toArray($res->getBody()->getContents()); })
->wait();
print_r($res);

注: wechatpay/wechatpay:~1.0.5 对类型做了强校验，这里的xml:total_amount金额，要用字符串分。

最后

企业微信发企业红包文档见这里，看着文档，填对参数，对接及代码写起来就是这么简单。。。

Repo: https://github.com/TheNorthMemory/wechatpay-php 欢迎 Star .