微信小程序实现红包功能（后端PHP实现逻辑）

},fail: function (res) {
console.log(response);
that.setData({
paymsg: '领取失败'
})
}
})
},showHb: function () {
this.setData({
showFlag: 1
})
},openHb: function () {
this.setData({
paymsg: '',paymsg2: ''
})
this.view_moneysure()
var _self = this;
_self.setData({
_num: 1
})
setTimeout(function () {
_self.setData({
_num: 0,showFlag: 0,bghide: 1
})
},1000)

},closeHb:function(){
this.setData({
bghide:0
})
},

<view class="draw-list {{showFlag == 1? 'active':''}}">
<image bindtap="openHb" class="{{_num==1?'active':''}}" src="http://www.17sucai.com/preview/1/2017-11-02/hb/image/open.png"&gt;

<view id="receive1" class="win1 {{bghide==1?'active':''}}">
<view class="openhb {{bghide==1?'active':''}}">
<view class="winBody2">
<view class="receive1-bg1">
<view class="receive1-head">

{{paymsg}} {{paymsg2}}

get_unique_value();// 随机字符串 //商户订单号，可以按要求自己组合28位的商户订单号 $data['partner_trade_no'] = $this->get_tradeno($data['mchid']); $data['openid'] = $re_openid;//用户openid $data['check_name'] = 'NO_CHECK';//校验用户姓名选项 $data['amount'] = '100';//金额,单位为分 $data['desc'] = "恭喜你得到一个红包";//企业付款描述信息 $data['spbill_create_ip'] = $obj->get_client_ip();//IP地址

$appsecret = WxopenWechatConfig::$compay_config['key'];
$data['sign'] = $this->sign($data,$appsecret);
//发红包接口地址
$url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers";

//将请求数据由数组转换成xml
$xml = $this->arraytoxml($data);
//进行请求操作
$res = $this->curl($xml,$url);
//将请求结果由xml转换成数组
$arr = $this->xmltoarray($res);

if (is_array($arr)) {
$arr['total_amount'] = $data['amount'];
}
//请请求信息和请求结果录入到数据库中
// 输出请求结果数组
return $arr;
}

public function create_rand_money($start = 30,$end = 100)
{
return mt_rand($start,$end);
}

public function sign($params,$appsecret)
{
ksort($params);
$beSign = array_filter($params,'strlen');
$pairs = array();
foreach ($beSign as $k => $v) {
$pairs[] = "$k=$v";
}

$sign_data = implode('&',$pairs);
$sign_data .= '&key=' . $appsecret;
return strtoupper(md5($sign_data));
}

/*

• 生成32位唯一随机字符串
  **/
  private
  function get_unique_value()
  {
  $str = uniqid(mt_rand(),1);
  $str = sha1($str);
  return md5($str);
  }

/*

• 将数组转换成xml
  **/
  private
  function arraytoxml(
  $arr
  ) {
  $xml = "";
  foreach ($arr as $k => $v) {
  $xml .= "<" . $k . ">" . $v . "</" . $k . ">";
  }
  $xml .= "";
  return $xml;
  }

/*

• 将xml转换成数组
  **/
  private
  function xmltoarray(
  $xml
  ) {
  //禁止引用外部xml实体
  libxml_disable_entity_loader(true);
  $xmlstring = simplexml_load_string($xml,"SimpleXMLElement",LIBXML_NOCDATA);
  $arr = json_decode(json_encode($xmlstring),true);
  return $arr;
  }

/*

• 进行curl操作
  **/
  private
  function curl(
  $param = "",$url
  ) {
  $postUrl = $url;
  $curlPost = $param;
  //初始化curl
  $ch = curl_init();
  //抓取指定网页
  curl_setopt($ch,CURLOPT_URL,$postUrl);
  //设置header
  curl_setopt($ch,CURLOPT_HEADER,0);
  //要求结果为字符串且输出到屏幕上
  curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
  //post提交方式
  curl_setopt($ch,CURLOPT_POST,1);
  // 增加 HTTP Header（头）里的字段
  curl_setopt($ch,CURLOPT_POSTFIELDS,$curlPost);
  // 终止从服务端进行验证
  curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
  curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);

//这个是证书的位置
curl_setopt($ch,CURLOPT_SSLCERT,DIR . '/cert/apiclient_cert.pem');
//这个也是证书的位置
curl_setopt($ch,CURLOPT_SSLKEY,DIR . '/cert/apiclient_key.pem');
//运行curl
$data = curl_exec($ch);
//关闭curl
curl_close($ch);

return $data;

}

public function get_tradeno($str)
{
return $str . date("Ymd",time()) . date("His",time()) . rand(1111,9999);
}