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"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。