class WeixinPayToUser

{

    /**

     * API 参数

     * @var array

     * 'mch_appid'         # 公众号APPID

     * 'mchid'             # 商户号

     * 'device_info'       # 设备号

     * 'nonce_str'         # 随机字符串

     * 'partner_trade_no'  # 商户订单号

     * 'openid'            # 收款用户openid

     * 'check_name'        # 校验用户姓名选项 针对实名认证的用户

     * 're_user_name'      # 收款用户姓名

     * 'amount'            # 付款金额

     * 'desc'              # 企业付款描述信息

     * 'spbill_create_ip'  # Ip地址

     * 'sign'              # 签名

     */

    public $parameters = [];

    public $SSLROOTCA_PATH='';

    public $SSLCERT_PATH='';

    public $SSLKEY_PATH='';

    public $appid='';

    public $secret='';

    public $mchid='';

    public $key='';//商户密钥

    public function __construct()

    {

        $this->url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers';

        $this->curl_timeout = 10;

        $this->SSLROOTCA_PATH=dirname(__FILE__).'/weixin/cert/rootca.pem';

        $this->SSLCERT_PATH=dirname(__FILE__).'/weixin/cert/apiclient_cert.pem';

        $this->SSLKEY_PATH=dirname(__FILE__).'/weixin/cert/apiclient_key.pem';

    }

    public function setParameter($key,$value){

        $this->parameters[$key]=$value;

    }

    function arrayToXml($arr,$dom=0,$item=0){

        if (!$dom){

            $dom = new DOMDocument("1.0");

        }

        if(!$item){

            $item = $dom->createElement("xml");

            $dom->appendChild($item);

        }

        foreach ($arr as $key=>$val){

            $itemx = $dom->createElement(is_string($key)?$key:"item");

            $item->appendChild($itemx);

            if (!is_array($val)){

                $text = $dom->createTextNode($val);

                $itemx->appendChild($text);

            }else {

                $this->arrayToXml($val,$dom,$itemx);

            }

        }

        $dom->encoding = 'UTF-8'; // insert proper

        return $dom->saveXML();

    }

    public function getSign($paramArr){//print_r($paramArr);

        ksort($paramArr);

        $paramStr = http_build_query($paramArr);

        $paramStr=urldecode($paramStr);

        $param_temp=$paramStr.'&key='.$this->key;//echo $param_temp.'<br>';

        $signValue=strtoupper(md5($param_temp));//echo $signValue.'<br>';

        return $signValue;

    }

    /**

     * 生成请求xml数据

     * @return string

     */

    public function createXml()

    {

        $this->parameters['mch_appid'] = $this->appid;

        $this->parameters['mchid']     = $this->mchid;

       // $this->parameters['nonce_str'] = md5(time());

        $this->parameters['nonce_str'] = 'dddfff';

        $this->parameters['sign']      = $this->getSign($this->parameters);

        $a= $this->arrayToXml($this->parameters);

        //echo $a;

        return $a;

    }

    public function pay(){

        $xml=$this->createXml();

        $url=$this->url;

        return $this->postXmlSSLCurl($xml,$url,$second=30);

    }

    /**

     *     作用：使用证书，以post方式提交xml到对应的接口url

     */

    function postXmlSSLCurl($xml,$url,$second=30)

    {

        $ch = curl_init();

        //超时时间

        curl_setopt($ch,CURLOPT_TIMEOUT,$second);

        //这里设置代理，如果有的话

        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');

        //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);

        //设置header

        curl_setopt($ch,CURLOPT_HEADER,FALSE);

        //要求结果为字符串且输出到屏幕上

        curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE);

        //设置证书

        //curl_setopt($ch,CURLOPT_CAINFO, $this->SSLROOTCA_PATH);

        //使用证书：cert 与 key 分别属于两个.pem文件

        //默认格式为PEM，可以注释

        curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');

        curl_setopt($ch,CURLOPT_SSLCERT, $this->SSLCERT_PATH);

        //默认格式为PEM，可以注释

        curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');

        curl_setopt($ch,CURLOPT_SSLKEY, $this->SSLKEY_PATH);

        //post提交方式

        curl_setopt($ch,CURLOPT_POST, true);

        curl_setopt($ch,CURLOPT_POSTFIELDS,$xml);

        $data = curl_exec($ch);

        //返回结果

        if($data){

            curl_close($ch);

            return $data;

        }

        else {

            $error = curl_errno($ch);

            echo "curl出错，错误码:$error"."<br>";

            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";

            curl_close($ch);

            return false;

        }

    }

}

?>

 /**

     * 企业付款测试

     */

    public function payToUser()

    {

        $mchPay = new WeiXinPayToUser();

        // 用户openid

        $mchPay->setParameter('openid', 'oy2lbszskklaslEKThrzqEziKEBzqU');

        // 商户订单号

        $mchPay->setParameter('partner_trade_no', 'test-'.time());

        // 校验用户姓名选项

        $mchPay->setParameter('check_name', 'NO_CHECK');

        // 企业付款金额  单位为分

        $mchPay->setParameter('amount', 100);

        // 企业付款描述信息

        $mchPay->setParameter('desc', '开发测试');

        // 调用接口的机器IP地址  自定义

        $mchPay->setParameter('spbill_create_ip', '127.0.0.1'); # getClientIp()

        // 收款用户姓名

        // $mchPay->setParameter('re_user_name', 'Max wen');

        // 设备信息

        // $mchPay->setParameter('device_info', 'dev_server');

        $response = $mchPay->postXmlSSL();

        if( !empty($response) ) {

            $data = simplexml_load_string($response, null, LIBXML_NOCDATA);

            echo json_encode($data);

        }else{

            echo json_encode( array('return_code' => 'FAIL', 'return_msg' => 'transfers_接口出错', 'return_ext' => array()) );

        }

    }

}