小程序提现到零钱

一 . 小程序提现到零钱的官方文档，建议先看下，再看下面的代码

地址：https://pay.weixin.qq.com/wiki/doc/api/tools/mch_pay.php?chapter=14_1

 付款规则：

调用接口所需参数，除下图中所需参数外，还需要小程序的支付key，证书。这两样在商户平台可以查看到，请提前准备好：

二 . 小程序提现到零钱不同于小程序退款，调用的是不同的微信接口，我的博客园也记载了小程序的退款，如有需要，前往查看。

三 . 准备好所需的参数后，只需要把我代码中对应的参数更改为你的，就可以用了 

    //微信小程序提现到零钱
    public function wxWithdraw(Request $request)
    {
        //$openid = $request->param('wxopenid');
        $openid = '接收提现的用户openid';
        $amount = $request->param('w_money');

        $data = [
            'mch_appid' => '小程序appid',
            'mchid' => '小程序商户号',//商户号
            'nonce_str' => self::getNonceStr(),//随机字符串，长度要求在32位以内
            'partner_trade_no' => self::create_order_no(),//商户订单号
            'openid' => $openid,
            'check_name' => 'NO_CHECK',
            'amount' => 30,//标价金额，单位分
            'desc' => '提现的描述',
            'spbill_create_ip' => self::getip()//终端IP
        ];

        $data['sign'] = self::makeSign($data);

        $xmldata = self::array2xml($data);

        $url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers";
        $res = self::curl_post_ssl2($url, $xmldata);

        if (empty($res)) {
            return json(['status' => 0, 'data' => '', 'msg' => '连接失败']);
        }

        $content = self::xml2array($res);
        p($content);//打印提现结果
    }

    //商户系统内部订单号，要求32个字符内
    public function getNonceStr($length = 32) {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str   = "";
        for ( $i = 0; $i < $length; $i++ )  {
            $str .= substr($chars, mt_rand(0, strlen($chars)-1), 1);
        }
        return $str;
    }

    //生成唯一订单号(简化版)
    public function create_order_no() {
        $order_no = substr(date('YmdHis'),2).rand(10000, 99999);
        return $order_no;
    }

    //获取IP地址
    public function getip() {
        static $ip = '';
        $ip = $_SERVER['REMOTE_ADDR'];
        if(isset($_SERVER['HTTP_CDN_SRC_IP'])) {
            $ip = $_SERVER['HTTP_CDN_SRC_IP'];
        } elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) {
            $ip = $_SERVER['HTTP_CLIENT_IP'];
        } elseif(isset($_SERVER['HTTP_X_FORWARDED_FOR']) AND preg_match_all('#d{1,3}.d{1,3}.d{1,3}.d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR']matches)) {
            foreach ($matches[0] AS $xip) {
                if (!preg_match('#^(10|172.16|192.168).#', $xip)) {
                    $ip = $xip;
                    break;
                }
            }
        }
           return $ip;
       }

    //生成签名
    public function makeSign($data){
        //获取微信支付秘钥
        $key = "小程序支付key";//这个在微信商户平台可以查看
        // 去空
        $data=array_filter($data);
        //签名步骤一：按字典序排序参数
        ksort($data);
        $string_a=http_build_query($data);
        $string_a=urldecode($string_a);
        //签名步骤二：在string后加入KEY
        $string_sign_temp=$string_a."&key=".$key;
        //签名步骤三：MD5加密
        $sign = md5($string_sign_temp);
        // 签名步骤四：所有字符转为大写
        $result=strtoupper($sign);
        return $result;
    }


    public function array2xml($arr, $level = 1)
    {
        $s = $level == 1 ? "<xml>" : '';
        foreach ($arr as $tagname => $value) {
            if (is_numeric($tagname)) {
                $tagname = $value['TagName'];
                unset($value['TagName']);
            }
            if (!is_array($value)) {
                $s .= "<{$tagname}>" . (!is_numeric($value) ? '<![CDATA[' : '') . $value . (!is_numeric($value) ? ']]>' : '') . "</{$tagname}>";
            } else {
                $s .= "<{$tagname}>" . $this->array2xml($value, $level + 1) . "</{$tagname}>";
            }
        }

        $s = preg_replace("/([x01-x08x0b-x0cx0e-x1f])+/", ' ', $s);
        return $level == 1 ? $s . "</xml>" : $s;
    }


　　
    public function curl_post_ssl2($url, $xmldata, $second=30,$aHeader=array()){
        $isdir = str_replace('Api.php','',__FILE__) . 'cert/';//这个是证书，需要到微信商户平台下载，然后放到服务器上

        $ch = curl_init();
        curl_setopt($ch,CURLOPT_TIMEOUT,$second);
        curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '10.206.30.98');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch,CURLOPT_URL,$url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $aHeader);

        curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');//证书类型
        curl_setopt($ch, CURLOPT_SSLCERT, $isdir . 'apiclient_cert.pem');//证书位置
        curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');//CURLOPT_SSLKEY中规定的私钥的加密类型
        curl_setopt($ch, CURLOPT_SSLKEY, $isdir . 'apiclient_key.pem');//证书位置
        curl_setopt($ch, CURLOPT_CAINFO, 'PEM');
        //curl_setopt($ch, CURLOPT_CAINFO, $isdir . 'rootca.pem');这个是可选的

        curl_setopt($ch,CURLOPT_POST, 1);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$xmldata);
        $data = curl_exec($ch);
        if(curl_errno($ch)){
            echo 'Error+'.curl_error($ch);
        }
        curl_close($ch);
        return $data;
    }

　　//将xml转为array
    public function xml2array($xml){
        　　//禁止引用外部xml实体
     　　libxml_disable_entity_loader(false);
     　　$result= json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
     　　return $result;
 　　}