class Wxapi {
 private $app_id = 'wxXXXXXXXXXXXX'; //公眾賬號(hào)appid，首先申請(qǐng)與之配套的公眾賬號(hào)
 private $app_secret = 'XXXXXXXXXXXXXXXXXXXXXXXX';//公眾號(hào)secret，用戶(hù)獲取用戶(hù)授權(quán)token
 private $app_mchid = 'XXXXXXXX';//商戶(hù)號(hào)id
 function __construct(){
 //do sth here....
 }
 /**
  * 微信支付
  * @param string $openid 用戶(hù)openid
  */
 public function pay($re_openid)
 {
  include_once('WxHongBaoHelper.php');
  $commonUtil = new CommonUtil();
  $wxHongBaoHelper = new WxHongBaoHelper();
  $wxHongBaoHelper->setParameter("nonce_str", $this->great_rand());//隨機(jī)字符串，丌長(zhǎng)于 32 位
  $wxHongBaoHelper->setParameter("mch_billno", $this->app_mchid.date('YmdHis').rand(1000, 9999));//訂單號(hào)
  $wxHongBaoHelper->setParameter("mch_id", $this->app_mchid);//商戶(hù)號(hào)
  $wxHongBaoHelper->setParameter("wxappid", $this->app_id);
  $wxHongBaoHelper->setParameter("nick_name", '紅包');//提供方名稱(chēng)
  $wxHongBaoHelper->setParameter("send_name", '紅包');//紅包發(fā)送者名稱(chēng)
  $wxHongBaoHelper->setParameter("re_openid", $re_openid);//相對(duì)于醫(yī)脈互通的openid
  $wxHongBaoHelper->setParameter("total_amount", 100);//付款金額，單位分
  $wxHongBaoHelper->setParameter("min_value", 100);//最小紅包金額，單位分
  $wxHongBaoHelper->setParameter("max_value", 100);//最大紅包金額，單位分
  $wxHongBaoHelper->setParameter("total_num", 1);//紅包収放總?cè)藬?shù)
  $wxHongBaoHelper->setParameter("wishing", '感謝您參與紅包派發(fā)活動(dòng)，祝您新年快樂(lè)！');//紅包祝福詫
  $wxHongBaoHelper->setParameter("client_ip", '127.0.0.1');//調(diào)用接口的機(jī)器 Ip 地址
  $wxHongBaoHelper->setParameter("act_name", '紅包活動(dòng)');//活勱名稱(chēng)
  $wxHongBaoHelper->setParameter("remark", '快來(lái)?yè)專(zhuān)?);//備注信息
  $postXml = $wxHongBaoHelper->create_hongbao_xml();
  $url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack';
  $responseXml = $wxHongBaoHelper->curl_post_ssl($url, $postXml);
  //用作結(jié)果調(diào)試輸出
  //echo htmlentities($responseXml,ENT_COMPAT,'UTF-8');
 $responseObj = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
 return $responseObj->return_code;
 }

/**
 * 生成隨機(jī)數(shù)
 */  
public function great_rand(){
 $str = '1234567890abcdefghijklmnopqrstuvwxyz';
 for($i=0;$i<30;$i++){
  $j=rand(0,35);
  $t1 .= $str[$j];
 }
 return $t1; 
}

/**
例如：
appid： wxd111665abv58f4f
mch_id： 10000100
device_info： 1000
Body： test
nonce_str： ibuaiVcKdpRxkhJA
第一步：對(duì)參數(shù)按照 key=value 的格式，并按照參數(shù)名 ASCII 字典序排序如下：
stringA="appid=wxd930ea5d5a258f4f&body=test&device_info=1000&mch_i
d=10000100&nonce_str=ibuaiVcKdpRxkhJA";
第二步：拼接支付密鑰：
stringSignTemp="stringA&key=192006250b4c09247ec02edce69f6a2d"
sign=MD5(stringSignTemp).toUpperCase()="9A0A8659F005D6984697E2CA0A
9CF3B7"
*/
protected function get_sign(){
 define('PARTNERKEY',"QSRXXXXXXXXXXXXXXXXXXXXX");
 try {
  if (null == PARTNERKEY || "" == PARTNERKEY ) {
   throw new SDKRuntimeException("密鑰不能為空！" . "<br>");
  }
  if($this->check_sign_parameters() == false) { //檢查生成簽名參數(shù)
   throw new SDKRuntimeException("生成簽名參數(shù)缺失！" . "<br>");
  }
  $commonUtil = new CommonUtil();
  ksort($this->parameters);
  $unSignParaString = $commonUtil->formatQueryParaMap($this->parameters, false);
  $md5SignUtil = new MD5SignUtil();
  return $md5SignUtil->sign($unSignParaString,$commonUtil->trimString(PARTNERKEY));
 }catch (SDKRuntimeException $e)
 {
  die($e->errorMessage());
 }
 
}

function curl_post_ssl($url, $vars, $second=30,$aHeader=array())
{
 $ch = curl_init();
 //超時(shí)時(shí)間
 curl_setopt($ch,CURLOPT_TIMEOUT,$second);
 curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);
 //這里設(shè)置代理，如果有的話(huà)
 curl_setopt($ch,CURLOPT_URL,$url);
 curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
 curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);  
 //cert 與 key 分別屬于兩個(gè).pem文件
 //請(qǐng)確保您的libcurl版本是否支持雙向認(rèn)證，版本高于7.20.1
 curl_setopt($ch,CURLOPT_SSLCERT,dirname(__FILE__).DIRECTORY_SEPARATOR.'zhengshu'.DIRECTORY_SEPARATOR.'apiclient_cert.pem');
 curl_setopt($ch,CURLOPT_SSLKEY,dirname(__FILE__).DIRECTORY_SEPARATOR.'zhengshu'.DIRECTORY_SEPARATOR.'apiclient_key.pem');
 curl_setopt($ch,CURLOPT_CAINFO,dirname(__FILE__).DIRECTORY_SEPARATOR.'zhengshu'.DIRECTORY_SEPARATOR.'rootca.pem');
 if( count($aHeader) >= 1 ){
  curl_setopt($ch, CURLOPT_HTTPHEADER, $aHeader);
 }
 curl_setopt($ch,CURLOPT_POST, 1);
 curl_setopt($ch,CURLOPT_POSTFIELDS,$vars);
 $data = curl_exec($ch);
 if($data){
  curl_close($ch);
  return $data;
 }
 else { 
  $error = curl_errno($ch);
  //echo "call faild, errorCode:$error\n"; 
  curl_close($ch);
  return false;
 }
}

@require "pay.php";
//獲取用戶(hù)信息
$get = $_GET['param'];
$code = $_GET['code'];
//判斷code是否存在
if($get=='access_token' && !empty($code)){
 $param['param'] = 'access_token';
 $param['code'] = $code;
 $packet = new Packet();
 //獲取用戶(hù)openid信息
 $userinfo = $packet->_route('userinfo',$param);
 if(empty($userinfo['openid'])){
  exit("NOAUTH");
 }
 //調(diào)取支付方法
 $packet->_route('wxpacket',array('openid'=>$userinfo['openid']));
}else{
 $packet->_route('userinfo');
}