本文实例讲述了php实现的微信红包算法。分享给大家供大家参考。具体如下：
具体代码：
<?php
/**
* 微信红包的类
*
*/
CLASS WXHongBao {
private $mch_id = "111111";//商户ID写死
private $wxappid = "22222222";//微信公众号，写死
private $client_ip = "119.29.80.114"; //调用红包接口的主机的IP,服务端IP,写死，即脚本文件所在的IP
private $apikey = "33333333";//pay的秘钥值
private $total_num = 1;//发放人数。固定值1，不可修改
private $nick_name = "微信产品中心公众号"; //红包商户名称
private $send_name = "微信产品中心公众号";//红包派发者名称
private $wishing = "祝福语"; //
private $act_name = "红包活动"; //活动名称
private $remark = "活动备注";
private $nonce_str = "";
private $mch_billno = "";
private $re_openid = "";//接收方的openID
private $total_amount = 1 ;//红包金额，单位 分
private $min_value = 1;//最小金额
private $max_value = 1; //根据接口要求，上述3值必须一致
private $sign = ""; //签名在send时生成
private $amt_type; //分裂红包参数，在sendgroup中进行定义，是常量 ALL_RAND
//证书，在构造函数中定义，注意！
private $apiclient_cert; //= getcwd()."/apiclient_cert.pem";
private $apiclient_key;// = getcwd()."/apiclient_key.pem";
//分享参数
private $isShare = false; //有用？似乎是无用参数，全部都不是必选和互相依赖的参数
private $share_content = "";
private $share_url ="";
private $share_imgurl = "";
private $wxhb_inited;
private $api_hb_group = "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendgroupredpack";//裂变红包
private $api_hb_single = "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack";
private $error = "ok"; //init
/**
* WXHongBao::__construct()
* 步骤
* new(openid,amount)
* setnickname
* setsend_name
* setwishing
* setact_name
* setremark
* send()
* @return void
*/
function __construct(){
//好像没有什么需要构造函数做的
$this->wxhb_inited = false;
$this->apiclient_cert = getcwd()."/apiclient_cert.pem";
$this->apiclient_key = getcwd()."/apiclient_key.pem";
}
public function err(){
return $this->error;
}
public function error(){
return $this->err();
}
/**
* WXHongBao::newhb()
* 构造新红包
* @param mixed $toOpenId
* @param mixed $amount 金额分
* @return void
*/
public function newhb($toOpenId,$amount){
if(!is_numeric($amount)){
$this->error = "金额参数错误";
return;
}elseif($amount<100){
$this->error = "金额太小";
return;
}elseif($amount>20000){
$this->error = "金额太大";
return;
}
$this->gen_nonce_str();//构造随机字串
$this->gen_mch_billno();//构造订单号
$this->setOpenId($toOpenId);
$this->setAmount($amount);
$this->wxhb_inited = true; //标记微信红包已经初始化完毕可以发送
//每次new 都要将分享的内容给清空掉，否则会出现残余被引用
$this->share_content= "";
$this->share_imgurl = "";
$this->share_url = "";
}
/**
* WXHongBao::send()
* 发出红包
* 构造签名
* 注意第二参数，单发时不要改动！
* @return boolean $success
*/
public function send($url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack",$total_num = 1){
if(!$this->wxhb_inited){
$this->error .= "(红包未准备好)";
return false; //未初始化完成
}
$this->total_num = $total_num;
$this->gen_Sign(); //生成签名
//构造提交的数据
$xml = $this->genXMLParam();
//debug
file_put_contents("hbxml.txt",$xml);
//提交xml,curl
//$url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack";
$ch = curl_init();
curl_setopt($ch,CURLOPT_TIMEOUT,10);
curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);
curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');
curl_setopt($ch,CURLOPT_SSLCERT,$this->apiclient_cert);
curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');
curl_setopt($ch,CURLOPT_SSLKEY,$this->apiclient_key);
/*
if( count($aHeader) >= 1 ){
curl_setopt($ch, CURLOPT_HTTPHEADER, $aHeader);
}
*/
curl_setopt($ch,CURLOPT_POST, 1);
curl_setopt($ch,CURLOPT_POSTFIELDS,$xml);
$data = curl_exec($ch);
if($data){
curl_close($ch);
$rsxml = simplexml_load_string($data);
if($rsxml->return_code == 'SUCCESS' ){
return true;
}else{
$this->error = $rsxml->return_msg;
return false;
}
}else{
$this->error = curl_errno($ch);
curl_close($ch);
return false;
}
}
/**
* WXHongBao::sendGroup()
* 发送裂变红包,参数为裂变数量
* @param integer $num 3-20
* @return
*/
public function sendGroup($num=3){
$this->amt_type = "ALL_RAND";//$amt; 固定值。发送裂变红包组文档指定参数，随机
return $this->send($this->api_hb_group,$num);
}
public function getApiSingle(){
return $this->api_hb_single;
}
public function getApiGroup(){
return $this->api_hb_group;
}
public function setNickName($nick){
$this->nick_name = $nick;
}
public function setSendName($name){
$this->send_name = $name;
}
public function setWishing($wishing){
$this->wishing = $wishing;
}
/**
* WXHongBao::setActName()
* 活动名称
* @param mixed $act
* @return void
*/
public function setActName($act){
$this->act_name = $act;
}
public function setRemark($remark){
$this->remark = $remark;
}
public function setOpenId($openid){
$this->re_openid = $openid;
}
/**
* WXHongBao::setAmount()
* 设置红包金额
* 文档有两处冲突描述
* 一处指金额 >=1 (分钱)
* 另一处指金额 >=100 < 20000 [1-200元]
* 有待测试验证！
* @param mixed $price 单位 分
* @return void
*/
public function setAmount($price){
$this->total_amount = $price;
$this->min_value = $price;
$this->max_value = $price;
}
//以下方法，为设置分裂红包时使用
public function setHBminmax($min,$max){
$this->min_value = $min;
$this->max_value = $max;
}
public function setShare($img="",$url="",$content=""){
//https://mmbiz.qlogo.cn/mmbiz/MS1jaDO92Ep4qNo9eV0rnItptyBrzUhJqT8oxSsCofdxibnNWMJiabaqgLPkDaEJmia6fqTXAXulKBa9NLfxYMwYA/0?wx_fmt=png
//http://mp.weixin.qq.com/s?__biz=MzA5Njg4NTk3MA==&mid=206257621&idx=1&sn=56241da30e384e40771065051e4aa6a8#rd
$this->share_content = $content;
$this->share_imgurl = $img;
$this->share_url = $url;
}
private function gen_nonce_str(){
$this->nonce_str = strtoupper(md5(mt_rand().time())); //确保不重复而已
}
private function gen_Sign(){
unset($param);
//其实应该用key重排一次 right?
$param["act_name"]=$this->act_name;//
if($this->total_num==1){ //这些是裂变红包用不上的参数，会导致签名错误
$param["client_ip"]=$this->client_ip;
$param["max_value"]=$this->max_value;
$param["min_value"]=$this->min_value;
$param["nick_name"]=$this->nick_name;
}
$param["mch_billno"] = $this->mch_billno; //
$param["mch_id"]=$this->mch_id;//
$param["nonce_str"]=$this->nonce_str; //
$param["re_openid"]=$this->re_openid;//
$param["remark"]=$this->remark; //
$param["send_name"]=$this->send_name;//
$param["total_amount"]=$this->total_amount;//
$param["total_num"]=$this->total_num; //
$param["wishing"]=$this->wishing;//
$param["wxappid"]=$this->wxappid;//
if($this->share_content) $param["share_content"] = $this->share_content;
if($this->share_imgurl) $param["share_imgurl"] = $this->share_imgurl;
if($this->share_url) $param["share_url"] = $this->share_url;
if($this->amt_type) $param["amt_type"] = $this->amt_type; //
ksort($param); //按照键名排序...艹，上面排了我好久
//$sign_raw = http_build_query($param)."&key=".$this->apikey;
$sign_raw = "";
foreach($param as $k => $v){
$sign_raw .= $k."=".$v."&";
}
$sign_raw .= "key=".$this->apikey;
//file_put_contents("sign.raw",$sign_raw);//debug
$this->sign = strtoupper(md5($sign_raw));
}
/**
* WXHongBao::genXMLParam()
* 生成post的参数xml数据包
* 注意生成之前各项值要生成，尤其是Sign
* @return $xml
*/
public function genXMLParam(){
$xml = "<xml>
<sign>".$this->sign."</sign>
<mch_billno>".$this->mch_billno."</mch_billno>
<mch_id>".$this->mch_id."</mch_id>
<wxappid>".$this->wxappid."</wxappid>
<nick_name><![CDATA[".$this->nick_name."]]></nick_name>
<send_name><![CDATA[".$this->send_name."]]></send_name>
<re_openid>".$this->re_openid."</re_openid>
<total_amount>".$this->total_amount."</total_amount>
<min_value>".$this->min_value."</min_value>
<max_value>".$this->max_value."</max_value>
<total_num>".$this->total_num."</total_num>
<wishing><![CDATA[".$this->wishing."]]></wishing>
<client_ip><![CDATA[".$this->client_ip."]]></client_ip>
<act_name><![CDATA[".$this->act_name."]]></act_name>
<remark><![CDATA[".$this->remark."]]></remark>
<nonce_str>".$this->nonce_str."</nonce_str>
";
if($this->share_content) $xml .= "<share_content><![CDATA[".$this->share_content."]]></share_content>
";
if($this->share_imgurl) $xml .= "<share_imgurl><![CDATA[".$this->share_imgurl."]]></share_imgurl>
";
if($this->share_url) $xml .= "<share_url><![CDATA[".$this->share_url."]]></share_url>
";
if($this->amt_type) $xml .= "<amt_type><![CDATA[".$this->amt_type."]]></amt_type>
";
$xml .="</xml>";
return $xml;
}
/**
* WXHongBao::gen_mch_billno()
* 商户订单号（每个订单号必须唯一）
组成： mch_id+yyyymmdd+10位一天内不能重复的数字。
接口根据商户订单号支持重入， 如出现超时可再调用。
* @return void
*/
private function gen_mch_billno(){
//生成一个长度10，的阿拉伯数字随机字符串
$rnd_num = array('0','1','2','3','4','5','6','7','8','9');
$rndstr = "";
while(strlen($rndstr)<10){
$rndstr .= $rnd_num[array_rand($rnd_num)];
}
$this->mch_billno = $this->mch_id.date("Ymd").$rndstr;
}
}
?>
然后实例化class.
$toOpenId = 'asdasdasd'; //接收红包的用户的微信OpenId
$hb = new WXHongBao();
$hb->newhb($toOpenId,1000); //新建一个10元的红包，第二参数单位是 分，注意取值范围 1-200元
//以下若干项可选操作，不指定则使用class脚本顶部的预设值
$hb->setNickName("土豪有限公司");
$hb->setSendName("土豪");
$hb->setWishing("恭喜发财");
$hb->setActName("发钱活动");
$hb->setRemark("任性一把");
//发送红包
if(!$hb->send()){ //发送错误
echo $hb->err();
}else{
echo "红包发送成功";
}
希望本文所述对大家的php程序设计有所帮助。