微信支付 V3 API

appid = '';//小程序appid
    $this->secret = '';//小程序secret
    $this->mch_id = '';//商户id
    $this->key = '';//v3key
    $this->serial_no = '';//v3序列号
}
public function ffff(){
   $rrr=  $this->unifiedOrder(1,'oDdl-6TWLTkclAZVNh7U1y7-kX4c',rand(1000,9999));
    return json(['code' => 200, 'msg' => '获取成功', 'data' => $rrr]);
}
/**
     * 下单方法
     * @param   $params 下单参数
     */
    public function unifiedOrder($product_type, $openid, $phone = '')
    {
        //订单总价
        $total_fee = 79900;
        if ($product_type == 1) {
            $total_fee = 79900;
        }
        if ($product_type == 2) {
            $total_fee = 99900;
        }
        $money = $total_fee;
        $url = "https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi";
        $urlarr = parse_url($url);
        $appid =  '';
      
        $mchid ='';//商户id
        $xlid = '';//秘钥序列号
        $data = [];
        $time = time();
        $data['appid'] = $appid;
        $data['mchid'] = $mchid;
        $data['description'] = '描述';//商品描述
        $data['out_trade_no'] = $phone . '_' . time() . '_xingji';//订单编号
        //$data['notify_url'] = $this->request->domain() . "/api/xjmpzl/notify";//回调接口 需根据自己的情况修改
        $data['notify_url'] =  "/notify";//回调接口 需根据自己的情况修改
        //$money = 1;
        $data['amount']['total'] = $money;//金额 单位 分
        $data['payer']['openid'] = $openid;//用户openID
      
        $data = json_encode($data);
        $noncestr = $time;
        $key = $this->getSign($data, $urlarr['path'], $noncestr, $time);//签名
     
        $token = sprintf('mchid="%s",serial_no="%s",nonce_str="%s",timestamp="%d",signature="%s"', $mchid, $xlid, $noncestr, $time, $key);//头部信息
        $header = [
            'Content-Type:' . 'application/json; charset=UTF-8',
            'Accept:application/json',
            'User-Agent:*/*',
            'Authorization: WECHATPAY2-SHA256-RSA2048 ' . $token
        ];
        $ret = $this->curl_post_https($url, $data, $header);
        
        $ret = ltrim($ret, '{"prepay_id":"');
        $ret = rtrim($ret, '}"');
        //微信支付（小程序）签名
        $str = $this->getWechartSign($appid, time(), $noncestr, 'prepay_id=' . $ret);
        
        $arr = [
            'appId' => $appid,
            'timeStamp' => time() . "",
            'package' => 'prepay_id=' . $ret,
            'paySign' => $str,
            'nonceStr' => $noncestr . ""
        ];
        
        
        
        
        return $arr;
      
    }

    //微信支付签名
    public function getSign($data = [], $url, $randstr, $time)
    {
        $str = "POST" . "\n" . $url . "\n" . $time . "\n" . $randstr . "\n" . $data . "\n";
        $key = file_get_contents('/apiclient_key.pem');//在商户平台下载的秘钥
         
        $str = $this->getSha256WithRSA($str, $key);
       
        return $str;
    }

    //调起支付的签名
    public function getWechartSign($appid, $timeStamp, $noncestr, $prepay_id)
    {
        $str = $appid . "\n" . $timeStamp . "\n" . $noncestr . "\n" . $prepay_id . "\n";
        $key = file_get_contents('/apiclient_key.pem');
        
      
        
        
        $str = $this->getSha256WithRSA($str, $key);
     
        return $str;
    }

    public function getSha256WithRSA($content, $privateKey)
    {
        $binary_signature = "";
        $algo = "SHA256";
        openssl_sign($content, $binary_signature, $privateKey, $algo);
        $sign = base64_encode($binary_signature);
        return $sign;
    }

    /* PHP CURL HTTPS POST */
    public function curl_post_https($url, $data, $header)
    {
       $action = curl_init();
       curl_setopt($action, CURLOPT_URL, $url);
       curl_setopt($action, CURLOPT_CONNECTTIMEOUT, 60);
       curl_setopt($action, CURLOPT_RETURNTRANSFER, 1);
       curl_setopt($action, CURLOPT_HEADER, 0);
       curl_setopt($action, CURLOPT_SSL_VERIFYPEER, 0);
       curl_setopt($action, CURLOPT_SSL_VERIFYHOST, 0);
       curl_setopt($action, CURLOPT_POST, 1);
       curl_setopt($action, CURLOPT_POSTFIELDS, $data);
       curl_setopt($action, CURLOPT_HTTPHEADER, $header);
       $result = curl_exec($action);
       curl_close($action);
       return $result;
    }
}