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】：
<?phpnamespaceRedClient\Controller;useThink\Controller;useRedClient\Redpack\WeiXinInfo;useRedClient\Redpack\Oauth;useRedClient\Redpack\SendRedPack;useRedClient\Redpack\CreateRedPack;classIndexControllerextendsController{publicfunctionindex(){$this->isWeixin();//是否是微信打开if($this->access){$this->display();}else{$class=newOauth();$class->index('/index.php/Index/oauth');}}//获取用户信息openIDpublicfunctionoauth(){$code=isset($_GET['code'])?strip_tags(trim($_GET['code'])):'';$state=isset($_GET['state'])?strip_tags(trim($_GET['state'])):'';$class=newOauth();$userInfo=$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$class=newCreateRedPack();$red=$class->redval();//发红包$class=newSendRedPack();$configs=array('send_name'=>'红包发送者名称',//红包发送者名称're_openid'=>$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'];}}publicfunctionisWeixin(){if(strpos($_SERVER['HTTP_USER_AGENT'],'MicroMessenger')!==false){$this->access=true;}returnfalse;}//类转换成数组publicfunctionobject2array($object){if(is_object($object)){foreach($objectas$key=>$value){$array[$key]=$value;}}else{$array=$object;}return$array;}}?>
<?phpnamespaceRedClient\Redpack;/**简单红包算法类**/classCreateRedPack{private$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));publicfunction__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$this->simplered=666;}publicfunctionredval(){$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;}protectedfunctionmaxred(){$rid=mt_rand(1,100000);$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;}}?>
<?phpnamespaceRedClient\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code2.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**********/classOauth{protected$appid='';protected$redirect_uri='';protected$state='';//mt_rand(100,999);protected$appsecret='';protected$data=array('flag'=>0,'msg'=>'','data'=>'');publicfunction__construct(){$this->appid='appid';//$this->appsecret='secret';//;$this->state=mt_rand(100,999);}//引导用户访问链接处理函数publicfunctionindex($redirect_uri){$this->redirect_uri=urlencode($redirect_uri);//微信自动跳转到$redirect_uriheader('location:https://open./connect/oauth2/authorize?appid='.$this->appid.'&redirect_uri='.$this->redirect_uri.'/oauth.php&response_type=code&scope=snsapi_userinfo&state='.$this->state.'&connect_redirect=1#wechat_redirect');}publicfunctiongetCode($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./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{$access_token_url='https://api./sns/oauth2/refresh_token?appid='.$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{$user_info_url='https://api./sns/userinfo?access_token='.$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$data;}}?>
<?php/******用于企业向微信用户个人发现金红包目前支持向指定微信用户的openid发放指定金额红包。（获取openid参见微信公众平台开发者文档：网页授权获取用户基本信息）****/namespaceRedClient\Redpack;classSendRedPack{private$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./mmpaymkttransfers/sendredpack';protected$requestXml='';//设置必要参数publicfunctionsetFields($conf=array()){foreach($confas$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$this->requestXml;}protectedfunctionbillno(){return$this->config['mch_id'].time().md5(mt_rand(1000,9999));}/*//检查必要参数是否为空！publicfunctioncheckConfig(){$flag=true;foreach($this->configas$k=>$v){if(empty($v)){$flag=false;break;}}}*///随机字符串，不长于32位publicfunctioncreateNonceStr($len=32){$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publicfunctionformatParam($config=array(),$flag=1){$format='';if(!empty($config)){ksort($config);foreach($configas$k=>$v){if($flag){$v=urlencode($v);}if($flag==0&&strtolower($k)=='sign'){continue;}$format.=$k.'='.$v.'&';}$format=trim($format,'&');}return$format;}//创建SIGNATUREprotectedfunctioncreateSign($config){$format=$this->formatParam($config,0);$format.='&key='.$this->key;$signature=strtoupper(md5($format));$this->config['sign']=$signature;returntrue;//$signature;}//创建xml格式数据protectedfunctioncreateXml(){$xml='<xml>';foreach($this->configas$k=>$v){if(!empty($v)){$xml.='<'.$k.'><![CDATA['.$v.']]></'.$k.'>';}}$xml.='</xml>';$this->requestXml=$xml;}//XML格式数据转换为数组publicfunctioncreateArray($xml=''){$arr=json_decode(json_encode(simplexml_load_string($xml,'SimpleXMLElement',LIBXML_NOCDATA)),true);return$arr;}//发送红包publicfunctionrequestXml($timeout=30,$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);returnfalse;}}//返回非空值，非NULLpublicfunctionnotEmpty($val=''){$return='';if(null!=$val&&strlen($val)!=0){$return=$val;}return$return?$return:false;}}?>
<?phpnamespaceRedClient\Redpack;classWeiXinInfo{private$AppID='appid';private$AppSecret='secret';private$grant_type='client_credential';private$url='https://api./cgi-bin/token';publicfunction__construct(){//$arr=array('access_token'=>'1','expires'=>'7200');}//设置获取ACCESSTOKEN的URLpublicfunctionsetUrl(){return$this->url=$this->url.'?grant_type='.$this->grant_type.'&appid='.$this->AppID.'&secret='.$this->AppSecret;}//获取APPID,SECRETpublicfunctiongetAppid(){$sql='selectappid,secretfromly_appidwhereflag=1';$model=M();$result=$model->query($sql);if(!empty($result)){$this->AppID=$result[0]['appid'];$this->AppSecret=$result[0]['secret'];return$result[0];}}publicfunctionobject2array($object){if(is_object($object)){foreach($objectas$key=>$value){$array[$key]=$value;}}else{$array=$object;}return$array;}//检验URL有效publicfunctioncheckUrl(){$signature=isset($_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;returntrue;}else{returnfalse;}}}//验证SIGNATURE是否有效privatefunctioncheckSign($sign,$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($sign)){returntrue;}returnfalse;}//通过微信接口获取微信Access_TokenpublicfunctiongetAccessToken(){$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$token;}//检查微信ACCESS_TOKEN是否有效publicfunctioncheckToken(){if(session('?'.md5('getaccesstoken'))&&session(md5('getaccesstoken'))){$time=time();$token=session(md5('getaccesstoken'));if($token->expires_in-$time>30){returntrue;}else{session(md5('getaccesstoken'),null);}}returnfalse;}//保存微信ACCESSTOKEN到数据库publicfunctionsaveAccessToken(){$token=$this->getAccessToken();$sql='select`id`,`rate`,token,ex_time,createtimefromly_tokenwheretoken="'.$token.'"whereappid="'.$this->AppID.'"ANDsecret="'.$this->AppSecret.'"';$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;//$sql='updately_tokensettoken="'.$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){returnfalse;}}}}}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='insertintoly_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){returnfalse;}}}}returnfalse;}}?>
