本文实例为大家分享了PHP微信公众号自动发送红包API代码，分享给大家供大家参考。具体如下：

贴出核心接口代码至于数据自己填写，接口测试ＯＫ

wechat_packet.php

<!--?php

/**

 * 发送红包接口

 * Created by PhpStorm.

 * User: ADKi

 * Date: 2016/4/25 0025

 * Time: 15:25

 */

class wechat_packet{

 private $url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack';//请求URL

 private $mch_id;//商户号

 private $weixin_appid;//公众账号appid

 private $send_name;//商户名称

 private $total_num = 1;//发送红包总人数

 private $wishing;//红包祝福语

 private $client_ip;//调用接口的机器Ip地址

 private $act_name;//活动名称

 private $remark;//备注信息

 private $nonce_str;//随机字符串，不长于32位

 private $api_password;

 private $arraytoxml;//数组转xml

 /**

  * 公钥

  */

 private $public_key = "/api/wechat/cert/apiclient_cert.pem";

 /**

  * 私钥

  */

 private $private_key = '/api/wechat/cert/apiclient_key.pem';

 /**

  * ca证书

  */

 private $rootca = 'api/wechat/cert/rootca.pem';

 public function __construct()

 {

  //初始化红包设置信息

  $this--->weixin_appid = C('wap_weixin_appid');

  $this->mch_id = C('wechat_mch_id');

  $this->send_name = C('wechat_send_name');

  $this->wishing = C('wechat_wishing');

  $this->act_name = C('wechat_act_name');

  $this->client_ip = $_SERVER['SERVER_ADDR'];

  $this->remark = C('wechat_remark');

  $this->nonce_str = $this->create_nonce_str(32);

  $this->api_password = C('wechat_api_password');

  $inc_file = BASE_PATH.DS.'api'.DS.'wechat'.DS.'arraytoxml.php';

  if(is_file($inc_file)) {

   require($inc_file);

  }

  $this->arraytoxml = new ArrayToXML();

 }

 public function send_post($mch_billno,$re_openid,$total_amount){

  $sign = $this->create_sign($mch_billno,$re_openid,$total_amount);

  $send_array = array(

   'nonce_str' => $this->nonce_str,

   'mch_billno' => $mch_billno,

   'mch_id' => $this->mch_id,

   'wxappid' => $this->weixin_appid,

   'send_name' => $this->send_name,

   're_openid' => $re_openid,

   'total_amount' => $total_amount,

   'total_num' => $this->total_num,

   'wishing' => $this->wishing,

   'client_ip' => $this->client_ip,

   'act_name' => $this->act_name,

   'remark' => $this->remark,

   'sign' => $sign,

  );

  $send_xml = $this->arraytoxml->toXml($send_array,'');

  $data = $this->curl_post_ssl($this->url, $send_xml);

  $data = $this->xmlToArray($data);

  file_put_contents('adki',var_export($data,true),FILE_APPEND);

 }

 /*

 请确保您的libcurl版本是否支持双向认证，版本高于7.20.1

 */

 private function curl_post_ssl($url, $vars, $second=30,$aHeader=array()){

  $ch = curl_init();

  //超时时间

  curl_setopt($ch,CURLOPT_TIMEOUT,$second);

  curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);

  //这里设置代理，如果有的话

  //curl_setopt($ch,CURLOPT_PROXY, '10.206.30.98');

  //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);

  curl_setopt($ch,CURLOPT_URL,$url);

  curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);

  curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);

  //以下两种方式需选择一种

  //第一种方法，cert 与 key 分别属于两个.pem文件

  //默认格式为PEM，可以注释

  curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');

  curl_setopt($ch,CURLOPT_SSLCERT,getcwd().$this->public_key);

  //默认格式为PEM，可以注释

  curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');

  curl_setopt($ch,CURLOPT_SSLKEY,getcwd().$this->private_key);

  //ca证书

  curl_setopt($ch,CURLOPT_CAINFO,$this->rootca);

  //第二种方式，两个文件合成一个.pem文件

  //curl_setopt($ch,CURLOPT_SSLCERT,getcwd().'/all.pem');

  if( count($aHeader) >= 1 ){

   curl_setopt($ch, CURLOPT_HTTPHEADER, $aHeader);

  }

  curl_setopt($ch,CURLOPT_POST, 1);

  curl_setopt($ch,CURLOPT_POSTFIELDS,$vars);

  $data = curl_exec($ch);

  if($data){

   curl_close($ch);

   return $data;

  }

  else {

   $error = curl_errno($ch);

   echo "call faild, errorCode:$error\n\n\n\n";

   curl_close($ch);

   return false;

  }

 }

 //生成签名

 private function create_sign($mch_billno,$re_openid,$total_amount){

  $string_array = array(

   'act_name' => $this->act_name,

   'client_ip' => $this->client_ip,

   'mch_billno' => $mch_billno,

   'mch_id' => $this->mch_id,

   'nonce_str' => $this->nonce_str,

   're_openid' => $re_openid,

   'remark' => $this->remark,

   'send_name' => $this->send_name,

   'total_amount' => $total_amount,

   'total_num' => $this->total_num,

   'wishing' => $this->wishing,

   'wxappid' => $this->weixin_appid,

  );

  foreach ($string_array as $key => $value){

   if(!empty($value)){

    $stringA .= "$key=$value";

    if($key != 'wxappid'){

     $stringA .= '&';

    }

   }

  }

  //转成UTF-8

  $stringA = $this->gbkToUtf8($stringA);

  $stringSignTemp="$stringA&key=$this->api_password";

  $sign = MD5($stringSignTemp);

  $sign = strtoupper($sign);

  return $sign;

 }

 //生成随机字符串

 private function create_nonce_str($length){

  $str = null;

  $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";

  $max = strlen($strPol)-1;

  for($i=0;$i<$length;$i++){

   $str.=$strPol[rand(0,$max)];//rand($min,$max)生成介于min和max两个数之间的一个随机整数

  }

  return $str;

 }

 /**

  *自动判断把gbk或gb2312编码的字符串转为utf8

  *能自动判断输入字符串的编码类，如果本身是utf-8就不用转换，否则就转换为utf-8的字符串

  *支持的字符编码类型是：utf-8,gbk,gb2312

  *@$str:string 字符串

  */

 private function gbkToUtf8($str){

  $charset = mb_detect_encoding($str,array('ASCII','UTF-8','GBK','GB2312'));

  $charset = strtolower($charset);

  if("utf-8" != $charset){

   $str = iconv('UTF-8',$charset,$str);

  }

  return $str;

 }

 private function xmlToArray($postStr){

  $msg = array();

  $msg = (array)simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);

  return $msg;

 }

}

数组转xml:arraytoxml.php

<!--?php

/**

 * Created by PhpStorm.

 * User: ADKi

 * Date: 2016/4/26 0026

 * Time: 12:19

 */

class ArrayToXML

{

 public function toXml($data){

  $xml = '<xml-->';

  foreach ($data as $key => $value){

   if (is_numeric($value)){

    $xml .= "<".$key.">".$value."<!--".$key."-->";

   }else{

    $xml .= "<".$key."><!--[CDATA[".$value."]]--><!--".$key."-->";

   }

  }

  $xml .= '';

  return $xml;

 }

}

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