发放红包文档：https://pay.weixin.qq.com/wiki/doc/api/tools/miniprogram_hb.php?chapter=13_9&index=2

领取红包文档：https://pay.weixin.qq.com/wiki/doc/api/tools/miniprogram_hb.php?chapter=13_10&index=3

class Index

{

public function index(Request $request=null)

{

//商户订单号(每个订单号必须唯一。取值范围：0~9，a~z，A~Z)

//组成： mch_id+yyyymmdd+10位一天内不能重复的数字。

$mch_billno = ''.rand(1000000000,9999999999);

$mch_id = '';//商户号

$wxappid = '';//小程序账号appid

$send_name = '';//商户名称

$re_openid = '';//用户openid

$total_amount = 30;//付款金额，单位分

$total_num = 1;//红包发放总人数

$wishing = '望天宇八方清似玉';//红包祝福语

$client_ip = '';//调用接口的服务器Ip地址,提前在小程序后台设置好

$act_name = '红包';//活动名称

$remark = '6666';//备注

$notify_way = 'MINI_PROGRAM_JSAPI';//通知用户形式JSAPI

$scene_id = 'PRODUCT_2';//发放红包使用场景，红包金额大于200时必传

$key = '';//商户号支付钥匙

$weixinpay = new WeixinPay($mch_billno, $mch_id, $wxappid, $send_name,$re_openid,$total_amount,$total_num,$wishing,$client_ip,$act_name,$remark,$notify_way,$scene_id,$key);

$res=$weixinpay->sendhb();

$result = [

'timeStamp'=> time()."",

'nonceStr'=>$this->createNoncestr(),

'package'=>urlencode($res['package']),

'appId'=>$wxappid,

];

$result['paySign'] = $this->getSign($result);

return json($result);

}

private function createNoncestr($length = 32) {

$chars = "abcdefghijklmnopqrstuvwxyz0123456789";

$str = "";

for ($i = 0; $i < $length; $i++) {

$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);

} return $str;

}

private function getSign($Obj) {

foreach ($Obj as $k => $v) {

$Parameters[$k] = $v;

}

//签名步骤一：按字典序排序参数

ksort($Parameters);

$String = $this->formatBizQueryParaMap($Parameters, false);

//签名步骤二：在 string 后加入 KEY

$String = $String . "&key=" . '商户号支付钥匙';

//签名步骤三：MD5 加密

$String = md5($String);

//签名步骤四：所有字符转为大写--根据接口需要打开限制

$result_ = $String;

// $result_ = strtoupper($String);

return $result_;

}

/**

* 作用：格式化参数，签名过程需要使用

* @param $paraMap

* @param $urlencode

* @return string

*/

private function formatBizQueryParaMap($paraMap, $urlencode) {

$buff = "";

ksort($paraMap);

foreach ($paraMap as $k => $v) {

if ($urlencode) {

$v = urlencode($v);

}

$buff .= $k . "=" . $v . "&";

}

$reqPar = "";

if (strlen($buff) > 0) {

$reqPar = substr($buff, 0, strlen($buff) - 1);

}

return $reqPar;

}

}

class WeixinPay {

private $sendurl = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/sendminiprogramhb';//发放红包接口

private $mch_billno;//商户订单号

private $mch_id;//商户号

private $wxappid;//公众账号appid

private $send_name;//商户名称

private $re_openid;//用户openid

private $total_amount;//付款金额，单位分

private $total_num;//红包发放总人数

private $wishing;//红包祝福语

private $client_ip;//Ip地址

private $act_name;//活动名称

private $remark;//备注

private $notify_way;//通知用户形式

private $scene_id;//发放红包使用场景，红包金额大于200时必传

private $key;//商户号支付钥匙

function __construct($mch_billno, $mch_id, $wxappid, $send_name,$re_openid,$total_amount,$total_num,$wishing,$client_ip,$act_name,$remark,$notify_way,$scene_id,$key) {

$this->mch_billno = $mch_billno;

$this->mch_id = $mch_id;

$this->wxappid = $wxappid;

$this->send_name = $send_name;

$this->re_openid = $re_openid;

$this->total_amount = $total_amount;

$this->total_num = $total_num;

$this->wishing = $wishing;

$this->client_ip = $client_ip;

$this->act_name = $act_name;

$this->remark = $remark;

$this->notify_way = $notify_way;

$this->scene_id = $scene_id;

$this->key = $key;

}

public function sendhb(){

//随机字符串

$nonce_str = $this->createNoncestr();

//商户订单号

$mch_billno = $this->mch_billno;

//商户号

$mch_id = $this->mch_id;

//公众账号appid

$wxappid = $this->wxappid;

//商户名称

$send_name = $this->send_name;

//用户openid

$re_openid = $this->re_openid;

//付款金额，单位分

$total_amount = $this->total_amount;

//红包发放总人数

$total_num = $this->total_num;

//红包祝福语

$wishing = $this->wishing;

//Ip地址

$client_ip = $this->client_ip;

//活动名称

$act_name = $this->act_name;

//备注

$remark = $this->remark;

//通知用户形式

$notify_way = $this->notify_way;

//发放红包使用场景，红包金额大于200时必传

$scene_id = $this->scene_id;

$parameters = array(

'nonce_str' => $nonce_str,

'mch_billno' => $mch_billno,

'mch_id' => $mch_id,

'wxappid' => $wxappid,

'send_name' => $send_name,

're_openid' => $re_openid,

'total_amount' => $total_amount,

'total_num' => $total_num,

'wishing' => $wishing,

'client_ip' => $client_ip,

'act_name' => $act_name,

'remark' => $remark,

'notify_way' => $notify_way,

'scene_id' => $scene_id

);

//生成签名，所有参数+key然后MD5

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

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

// var_dump($xmlData);

$curlres = $this->postXmlCurl($xmlData, $this->sendurl);

// var_dump($curlres);

$res = $this->xmlToArray($curlres);

// var_dump($res);

return $res;

}

private function postXmlCurl($xml, $url)

{

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

//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);

//post提交方式

curl_setopt($ch, CURLOPT_POST, TRUE);

curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);

curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);

curl_setopt($ch, CURLOPT_TIMEOUT, 20);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

//证书的位置

// var_dump(curl_setopt($ch, CURLOPT_SSLCERT, __DIR__ . '/cert/apiclient_cert.pem'));die;

curl_setopt($ch, CURLOPT_SSLCERT,'D:/phpstudy_pro/WWW/weixinpem/apiclient_cert.pem');

//证书key的位置

curl_setopt($ch, CURLOPT_SSLKEY,'D:/phpstudy_pro/WWW/weixinpem/apiclient_key.pem');

//运行curl

$data = curl_exec($ch);

//返回结果

if ($data) {

curl_close($ch);

return $data;

} else {

$error = curl_errno($ch);

curl_close($ch);

throw new Exception("curl出错，错误码:$error");

}

}

//数组转换成xml

private function arrayToXml($arr) {

$xml = "";

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

if (is_array($val)) {

$xml .= "" . $this->arrayToXml($val) . "" . $key . ">";

} else {

$xml .= "" . $val . "" . $key . ">";

}

}

$xml .= "";

return $xml;

}

//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);

$val = json_decode(json_encode($xmlstring), true);

return $val;

}

//作用：产生随机字符串，不长于32位

private function createNoncestr($length = 32) {

$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

$str = "";

for ($i = 0; $i < $length; $i++) {

$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);

}

return $str;

}

//作用：生成签名

private function getSign($Obj) {

foreach ($Obj as $k => $v) {

//不为空的参数才参与签名

if(!empty($v)){

$Parameters[$k] = $v;

}

}

//签名步骤一：按字典序排序参数

ksort($Parameters);

$String = $this->formatBizQueryParaMap($Parameters, false);

//签名步骤二：在string后加入KEY

$String = $String . "&key=" . $this->key;

//签名步骤三：MD5加密

$String = md5($String);

//签名步骤四：所有字符转为大写

$result = strtoupper($String);

return $result;

}

//作用：格式化参数，签名过程需要使用

private function formatBizQueryParaMap($paraMap, $urlencode) {

$buff = "";

ksort($paraMap);

foreach ($paraMap as $k => $v) {

if ($urlencode) {

$v = urlencode($v);

}

$buff .= $k . "=" . $v . "&";

}

$reqPar = '';

if (strlen($buff) > 0) {

$reqPar = substr($buff, 0, strlen($buff) - 1);

}

return $reqPar;

}

}