use GuzzleHttp\Client;
use WechatPay\GuzzleMiddleware\WechatPayMiddleware;
use WechatPay\GuzzleMiddleware\Util\PemUtil;
protected $appid                = '';  // 应⽤ID
protected $merchantId          = '';  // 商户ID
protected $AppSecret            = '';  // AppSecret
protected $v3_key              = '';
protected $serial_no            = '';  // api证书序列号
protected $merchantPrivateKey  = './cert/apiclient_key.pem';  // 商户私钥
protected $wechatpayCertificate = './cert/cert.pem';          // 上⾯解密后得到的证书
protected $apppay = 'h.weixin.qq/v3/pay/transactions/app';
public function return_data($code,$msg,$data=array()){
return array('code' => $code,'msg'=>$msg,'data'=>$data);
}
/**
* @Notes: app⽀付
* @Interface pay
* @param $description      商品描述
* @param $out_trade_no    商户单号
* @param $notify_url      回调地址
* @param $total            ⽀付⾦额分
* @author: Chengzhitao
* @Time: 2021/6/9 15:43
*/
public function pay($description,$out_trade_no,$notify_url,int $total){
// 构造⼀个WechatPayMiddleware
$wechatpayMiddleware = WechatPayMiddleware::builder()
$merchantPrivateKey  = PemUtil::loadPrivateKey($this->merchantPrivateKey);
$wechatpayCertificate = PemUtil::loadCertificate($this->wechatpayCertificate);
->withMerchant($this->merchantId, $this->serial_no, $merchantPrivateKey) // 传⼊商户相关配置
->withWechatPay([ $wechatpayCertificate ]) // 可传⼊多个⽀付平台证书，参数类型为array
->build();
// 将WechatPayMiddleware添加到Guzzle的HandlerStack中
$stack = HandlerStack::create();
$stack->push($wechatpayMiddleware, 'wechatpay');
// 创建Guzzle HTTP Client时，将HandlerStack传⼊
$client = new Client(['handler' => $stack]);
// 接下来，正常使⽤Guzzle发起API请求，WechatPayMiddleware会⾃动地处理签名和验签
try {
php手机版下载
$resp = $client->request('POST', $this->apppay, [
'json' => [ // JSON请求体
'appid'        => $this->appid,
'mchid'        => $this->merchantId,
'description'  => $description,
'out_trade_no' => $out_trade_no,
'notify_url'  => $notify_url,
'amount'      => [
'total'    => $total,
'currency' => 'CNY'
]
],
'headers' => [
'Content-Type' => 'application/json',
'Accept' => 'application/json',
'User-Agent' => 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36'    // 模拟⼿机            ]
]);
if ($resp->getStatusCode() == 200) {
$rep = json_decode($resp->getBody(),true);
$data = [
'appid'    => $this->appid,
'partnerid' => $this->merchantId,  // 商户号
'prepayid'  => $rep['prepay_id'],  // 预⽀付id
'package'  => 'Sign=WXPay',
'noncestr'  => $this->nonce_str(),
'timestamp' => time()
];
$data['sign'] = $this->sign($data);

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