微信现金红包接口实现红包发放：

一：流程：【

流程：微信用户访问红包活动页面--》后端判断是否是微信访问的

【否：提示用微信打开连接，是：提示用户是否授权允许，获取其的用户信息【openID等信息】】--》

进入红包活动页面---》用户点击领取红包【判断是否领取过红包】是：【提示已领取过红包】否

--》后端程序调用接口发放红包

--》微信用户在微信中收到红包

--》打开红包

--》红包金额会添加到钱包零钱里

--》完成红包发放。

】

二：要实现微信现金红包接口实现红包发放，首先要符合以下条件：

1.用于发放红包的微信公众号要是服务类型

2.登录微信公众平台官网后，在公众平台后台管理页面 - 开发者中心页，

点击“修改配置”按钮，填写服务器地址（URL）、Token和EncodingAESKey，

其中URL是开发者用来接收微信消息和事件的接口URL。Token可由开发者可以任意填写，

用作生成签名（该Token会和接口URL中包含的Token进行比对，从而验证安全性）。

EncodingAESKey由开发者手动填写或随机生成，将用作消息体加解密密钥。

3.获取access_token：公众号可以使用AppID和AppSecret调用本接口来获取access_token。

【AppID和AppSecret可在微信公众平台官网-开发者中心页中获得（需要已经成为开发者，且帐号没有异常状态）。】

4.微信公众号要开通 “网页授权接口” 用户获取用户基本信息【特别是openID ，发红包时用到】

5.微信公众号的 “微信支付“  中的  ”商户号” 要开通微信支付【发红包的金额是该支付账户扣款】，开通“现金红包”接口【调用该接口发放红包】。

6. 登陆 ”商户号”【微信公众号分配的商户号。第5 中有说明】 在 “API安全” 中 下载PHP版的 证书 【.pem格式】

以上如描述不清楚，请查看 微信开发者文档 里面有详细的秒杀。

部分代码如下【其余的请查看附件】：

<?php
namespace RedClient\Controller;
use Think\Controller;
use RedClient\Redpack\WeiXinInfo;
use RedClient\Redpack\Oauth;
use RedClient\Redpack\SendRedPack;
use RedClient\Redpack\CreateRedPack;
class IndexController extends Controller {public function index(){$this->isWeixin();//是否是微信打开if($this->access){$this->display();}else{$class=new Oauth();$class->index('http://www.myweb.com/index.php/Index/oauth');}}//获取用户信息 openIDpublic function oauth(){$code=isset($_GET['code'])?strip_tags(trim($_GET['code'])):'';$state=isset($_GET['state'])?strip_tags(trim($_GET['state'])):'';$class=new Oauth();$userInfo=$class->getCode($code,$state);//获取用户信息if(!empty($userInfo['data'])){//$model=M('wxuser');//$result=$model->where('openid = "'.$userInfo['data']->openid.'"')->field('openid')->select();if(empty($result)){$userInfo['data']=$this->object2array($userInfo['data']);$model->data($userInfo['data'])->add();}}$userInfo['data']=$this->object2array($userInfo['data']);//创建红包$class=new CreateRedPack();$red=$class->redval();//发红包$class=new SendRedPack();$configs=array('send_name'=>'红包发送者名称',//红包发送者名称're_openid'=>$userInfo['data']['openid'],//接受红包的用户,用户在wxappid下的openid'total_amount'=>$red,//付款金额，单位分'total_num'=>'1',//红包发放总人数'wishing'=>'红包祝福语',//红包祝福语'client_ip'=>$_SERVER['SERVER_ADDR'],//调用接口的机器Ip地址'act_name'=>'活动名称',//活动名称'remark'=>'备注信息',// 备注信息);$class->setFields($configs);$result=$class->requestXml();//微信返回信息处理if(strtoupper($result['return_code'])=='SUCCESS'){if(strtoupper($result['result_code'])=='SUCCESS'){//红包发送成功!$datas['flag']=1;echo $result['err_code_des'];}else{//红包发送失败$datas['flag']=0;$datas['msg']=$result['err_code_des'];echo $result['err_code_des'];}}else{//红包发送失败$datas['flag']=0;$datas['msg']=$result['err_code_des'];echo $result['err_code_des'];}}public function isWeixin(){if (strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false) { $this->access=true; } return false; }//类转换成数组public function object2array($object) {if (is_object($object)) {foreach ($object as $key => $value) {$array[$key] = $value;}}else {$array = $object;}return $array;}}?>

<?php
namespace RedClient\Redpack;
/**简单红包算法类
**/
class CreateRedPack{private $rid=0;//当前红包随机数private $rand_arr=array();//35%是1.0到1.1 红包随机数private $rand_arr1=array();//35%是1.1到1.2 红包随机数private $rand_arr2=array();//30%是1.2到1.95 红包随机数private $red=0;//红包金额private $simplered=0;private $red_config=array(array('min'=>1.0,'max'=>1.1),array('min'=>1.1,'max'=>1.2),array('min'=>1.2,'max'=>1.95));public function __construct(){$this->rid=mt_rand(1,10000);//当前红包随机数$this->rand_arr=range(1,3500);//35%是1.0到1.1$this->rand_arr1=range(3501,7000);//35%是1.1到1.2$this->rand_arr2=range(7001,10000);//30%是1.2到1.95$this->simplered=666;}public function redval(){$maxrp=$this->maxred();//随机最大红包金额if($maxrp!=$this->simplered){if(in_array($this->rid,$this->rand_arr)){$red_val=$this->red_config[0];$min=$red_val['min']*100;$max=$red_val['max']*100;$this->red=mt_rand($min,$max);$this->red=$this->red/100;}elseif(in_array($this->rid,$this->rand_arr1)){$red_val=$this->red_config[1];$min=$red_val['min']*100;$max=$red_val['max']*100;$red=mt_rand($min,$max);$this->red=$this->red/100;}elseif(in_array($this->rid,$this->rand_arr2)){$red_val=$this->red_config[2];$min=$red_val['min']*100;$max=$red_val['max']*100;$this->red=mt_rand($min,$max);$this->red=$this->red/100;}}else{$this->red=$maxrp;}return $this->red?$this->red:1;}protected function maxred(){$rid=mt_rand(1,100000);$rid1=mt_rand(1,100000);$red=0;$dff=$rid-$rid1;if($dff > 0){if(($rid1%$rid1)==$this->simplered){$red=$this->simplered;}}else{if(($rid1%$rid)==$this->simplered){$red=$this->simplered;}}return $red;}}?>

<?php
namespace RedClient\Redpack;
/*********先在公共平台配置授权的域名；然后才能通过，网页授权方式获取微信用户基本信息网页授权流程分为四步： 1.引导用户进入授权页面同意授权，获取code 2.通过code换取网页授权access_token（与基础支持中的access_token不同） 3.如果需要，开发者可以刷新网页授权access_token，避免过期 4.通过网页授权access_token和openid获取用户基本信息 **********/
class Oauth{protected $appid='';protected $redirect_uri='';protected $state='';//mt_rand(100,999);protected $appsecret='';protected $data=array('flag'=>0,'msg'=>'','data'=>'');public function __construct(){$this->appid='appid';//$this->appsecret='secret';//;$this->state=mt_rand(100,999);}//引导用户访问链接处理函数  public function index($redirect_uri){$this->redirect_uri=urlencode($redirect_uri);//微信自动跳转到$redirect_uriheader('location:https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$this->appid.'&redirect_uri='.$this->redirect_uri.'/oauth.php&response_type=code&scope=snsapi_userinfo&state='.$this->state.'&connect_redirect=1#wechat_redirect');}public function getCode($code='',$state='',$token='',$webToken=''){$data=array('errorno'=>'','errormsg'=>'','data'=>'');if(empty($code)){$this->data['flag']=0;$this->data['msg']='授权失败！';}else{  /* 1获取webtoken2获取reflash_token3获取用户信息 */$token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$this->appid.'&secret='.$this->appsecret.'&code='.$code.'&grant_type=authorization_code';$token = json_decode(file_get_contents($token_url));if (isset($token->errcode)) {$data['errorno']=$token->errcode;$data['errormsg']=$token->errmsg;}else{$access_token_url = 'https://api.weixin.qq.com/sns/oauth2/refresh_token?appid='.$this->appid.'&grant_type=refresh_token&refresh_token='.$token->refresh_token;//转成对象$accessToken = json_decode(file_get_contents($access_token_url));if (isset($accessToken->errcode)) {$data['errorno']=$token->errcode;$data['errormsg']=$token->errmsg;}else{$user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$accessToken->access_token.'&openid='.$accessToken->openid.'&lang=zh_CN';//转成对象$userInfo = json_decode(file_get_contents($user_info_url));if (isset($userInfo->errcode)) {$data['errorno']=$token->errcode;$data['errormsg']=$token->errmsg;}else{$data['data']=$userInfo;}}}}return $data;}}?>

<?php
/******用于企业向微信用户个人发现金红包目前支持向指定微信用户的openid发放指定金额红包。（获取openid参见微信公众平台开发者文档：网页授权获取用户基本信息）****/
namespace RedClient\Redpack;class SendRedPack{private $config=array('nonce_str'=>'',//随机字符串，不长于32位'sign'=>'',//签名'mch_billno'=>'',//商户订单号'mch_id'=>'1111sdfsafsaddf',//微信支付分配的商户号'wxappid'=>'sddafdsadfdsafdsdd',//微信分配的公众账号ID'send_name'=>'',//红包发送者名称're_openid'=>'',//接受红包的用户,用户在wxappid下的openid'total_amount'=>'',//付款金额，单位分'total_num'=>'',//红包发放总人数'wishing'=>'',//红包祝福语'client_ip'=>'',//调用接口的机器Ip地址'act_name'=>'',//活动名称'remark'=>'',//  备注信息);protected $key='';protected $url='https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack';protected $requestXml='';//设置必要参数public function setFields($conf=array()){foreach($conf as $k=>$v){if(isset($this->config[$k]) && !empty($v)){$this->config[$k]=$v;}}$this->config['mch_billno']=$this->billno();$this->config['nonce_str']=$this->createNonceStr();$this->createSign($conf);$this->createXml();//echo $this->requestXml;}protected function billno(){return $this->config['mch_id'].time().md5(mt_rand(1000,9999));}/* //检查必要参数是否为空！public function checkConfig(){$flag=true;foreach($this->config as $k=>$v){if(empty($v)){$flag=false;break;}}} *///随机字符串，不长于32位public function createNonceStr( $len=32 ){$strs = "abcdefghijklmnopqrstuvwxyz0123456789";$str ="";$len=$len<=32?$len:32;for ( $i = 0; $i < $len; $i++ ){$str.= substr($strs, mt_rand(0, strlen($strs)-1), 1);}return $str;}//格式化参数public function formatParam($config=array(),$flag=1){$format='';if(!empty($config)){ksort($config);foreach($config as $k=>$v){if($flag){$v=urlencode($v);}if($flag==0 && strtolower($k)=='sign'){continue;}$format.=$k.'='.$v.'&';}$format=trim($format,'&');}return $format;}//创建SIGNATURE   protected function createSign($config){$format=$this->formatParam($config,0);$format.='&key='.$this->key;$signature=strtoupper(md5($format));$this->config['sign']=$signature;return true;//$signature;}//创建xml格式数据protected function createXml(){$xml='<xml>';foreach($this->config as $k=>$v){if(!empty($v)){$xml.='<'.$k.'><![CDATA['.$v.']]></'.$k.'>';}}$xml.='</xml>';$this->requestXml=$xml;}//XML格式数据转换为数组public function createArray($xml=''){$arr = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);return $arr;}//发送红包public function requestXml($timeout=30,$header=array()){$ch = curl_init();//超时时间curl_setopt($ch,CURLOPT_TIMEOUT,$timeout);curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch,CURLOPT_URL,$this->url);curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);//默认格式为PEM，可以注释curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');curl_setopt($ch,CURLOPT_SSLCERT,dirname(__FILE__).'/apiclient_cert.pem');//pem证书地址//默认格式为PEM，可以注释curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');curl_setopt($ch,CURLOPT_SSLKEY,dirname(__FILE__).'/apiclient_key.pem');//key证书地址curl_setopt($ch,CURLOPT_CAINFO,'PEM');curl_setopt($ch,CURLOPT_CAINFO,dirname(__FILE__).'/rootca.pem');//CA证书地址//两个文件合成一个.pem文件//curl_setopt($ch,CURLOPT_SSLCERT,getcwd().'/all.pem');if( count($header) >= 1 ){curl_setopt($ch, CURLOPT_HTTPHEADER, $header);}curl_setopt($ch,CURLOPT_POST, 1);curl_setopt($ch,CURLOPT_POSTFIELDS,$this->requestXml);$data = curl_exec($ch);var_dump($data);if($data){curl_close($ch);var_dump($data);return $data;}else {$error = curl_errno($ch);echo 'ERROR:'.$error;curl_close($ch);return false;}}//返回非空值，非NULLpublic function notEmpty($val=''){$return='';if(null !=$val && strlen($val) != 0){$return=$val;}return $return?$return:false;}}?>

<?php
namespace RedClient\Redpack;
class WeiXinInfo{private $AppID='appid';private $AppSecret='secret';private $grant_type='client_credential';private $url='https://api.weixin.qq.com/cgi-bin/token';public function __construct(){//$arr=array('access_token'=>'1','expires'=>'7200');}//设置获取ACCESSTOKEN 的URLpublic function setUrl(){return $this->url=$this->url.'?grant_type='.$this->grant_type.'&appid='.$this->AppID.'&secret='.$this->AppSecret;}//获取APPID,SECRETpublic function getAppid(){$sql='select appid,secret from ly_appid where flag=1';$model=M();$result=$model->query($sql);if(!empty($result)){$this->AppID=$result[0]['appid'];$this->AppSecret=$result[0]['secret'];return $result[0];}}public function object2array($object) {if (is_object($object)) {foreach ($object as $key => $value) {$array[$key] = $value;}}else {$array = $object;}return $array;}//检验URL有效public function checkUrl(){$signature=isset($_GET['signature'])?strip_tags(trim($_GET['signature'])):'';$timestamp=isset($_GET['timestamp'])?strip_tags(trim($_GET['timestamp'])):'';$nonce=isset($_GET['nonce'])?strip_tags(trim($_GET['nonce'])):'';$echostr=isset($_GET['echostr'])?$_GET['echostr']:'';if(!empty($signature) && !empty($timestamp) && !empty($nonce)){if($this->checkSign($signature,$timestamp,$nonce)){echo $echostr;return true;}else{return false;}}}    //验证SIGNATURE是否有效private function checkSign($sign,$timestamp,$nonce){$token=$this->getAccessToken();//$token=$this->object2array($token);$sign_arr=array($token,$timstamp,$nonce);sort($sign_arr,SORT_STRING);$signStr=implode($sign_arr);$signStr=sha1($signStr);if(strtoupper($signStr)==strtoupper($sign)){return true;}return false;}//通过微信接口获取微信Access_Token  public function getAccessToken(){$token='';$this->setUrl();$check=$this->checkToken();if(session('?'.md5('getaccesstoken')) && $check){$tokens=session(md5('getaccesstoken'));$token=$tokens->access_token;}else{$result=file_get_contents($this->url);$result=json_decode($result);$token=$result->access_token;$result->expires_in=$result->expires_in+time();session(md5('getaccesstoken'),$result);}return $token;}//检查微信ACCESS_TOKEN是否有效public function checkToken(){if(session('?'.md5('getaccesstoken')) && session(md5('getaccesstoken'))){$time=time();$token=session(md5('getaccesstoken'));if($token->expires_in-$time > 30){return true;}else{session(md5('getaccesstoken'),null);}}return false;}//保存微信ACCESSTOKEN到数据库   public function saveAccessToken(){$token=$this->getAccessToken();$sql='select `id`,`rate`,token,ex_time,createtime from ly_token where token="'.$token.'" where appid="'.$this->AppID.'" AND secret="'.$this->AppSecret.'"';$model=M();$result=$model->query($sql);if(!empty($result)){$time=time();$expires=$time-$result[0]['createtime'];if($result[0]['ex_time']-$expires > 0){return $result[0]['token'];                      }else{$token=$this->getAccessToken();if(!empty($token)){$token=json_decode($token);if(!isset($token['errcode']) or !$token['errcode']){if(isset($token['access_token']) && $token['access_token']){$data['access_token']=$token['access_token'];$data['createtime']=$time;$data['ex_time']=$token['expires_in'];$data['rate']=$result[0]['rate']+1;//$sql='update ly_token set token="'.$token['access_token'].'" ,createtime='.$time.',ex_time='.$token['expires_in'].' where `id`='.$result[0]['id'];$model=M('token');$update=$model->where('`id`='.$result[0]['id'])->save($data);if($update){return $token['access_token'];}}}else{//微信返回的错误信息$data['errcode']=$token['errcode'];$data['errmsg']=$token['errmsg'];$data['appid']=$this->AppID;$data['secret']=$this->AppSecret;$data['createtime']=time();$data['rate']=$result[0]['rate']+1;$ein=$model->where('`id`='.$result[0]['id'])->save($data);if($ein){return false;}}}}}else{//新插入数据库保存$token=$this->getAccessToken();$model=M('token');if(!empty($token)){$data=array();$token=json_decode($token);if(!isset($token['errcode']) or !$token['errcode']){if(isset($token['access_token']) && $token['access_token']){$data['access_token']=$token['access_token'];$data['createtime']=$time;$data['ex_time']=$token['expires_in'];//$sql='insert into ly_token() vlaues()';$data['rate']=1;$in=$model->data($data)->add();if($ein){$token['access_token'];}}}else{//微信返回的错误信息$data['errcode']=$token['errcode'];$data['errmsg']=$token['errmsg'];$data['appid']=$this->AppID;$data['secret']=$this->AppSecret;$data['createtime']=time();$data['rate']=1;$ein=$model->data($data)->add();if($ein){return false;}}}}return false;}  }?>