<?php
/**
  * wechat php test
  */

//define your token
require_once "common.php";
//这里是引入curl发送函数的类
require_once ‘WeChat.class.php‘;
define("TOKEN", "twgdh");

//这里让这个类继承了curl发送参数的类
class wechatCallbackapiTest extends WeChat
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }

    public function responseMsg()
    {
        //get post data, May be due to the different environments
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        
          //extract post data
        if (!empty($postStr)){
                /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
                   the best way is to check the validity of xml by yourself */
                // 使用simplexml技术对xml进行解析 
                // libxml_disable_entity_loader(true), 是从安全性考虑，为了防止xml外部注入，
                //只对xml内部实体内容进行解析
                libxml_disable_entity_loader(true);
                //加载 postStr 字符串
                $postObj = simplexml_load_string($postStr, ‘SimpleXMLElement‘, LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
                $keyword = trim($postObj->Content);
                $time = time();
                global $tmp_arr;
                
                //当用户公众号有互动时，我们将会动hd_time字段更新
                $connect = mysql_connect(‘localhost‘,‘root‘,‘root‘) or die(‘数据库链接失败‘);
                mysql_select_db(‘wxdb‘,$connect);
                mysql_query(‘set names utf8‘);
                $sql = "update qf_users set hd_time=‘{$time}‘ where openid=‘{$fromUsername}‘";
                mysql_query($sql, $connect);
                
                //根据接收到的消息类型，来进行分支处理(switch)
                switch($postObj->MsgType)
                {
                    case ‘event‘:
                        if($postObj->Event == ‘subscribe‘)
                        {
                            
                            $contentStr = "欢迎关注leigood微信测试号噢";
                            $resultStr = sprintf($tmp_arr[‘text‘], $fromUsername, $toUsername, $time, $contentStr);
                            echo $resultStr; 
                            
                            //消息回复后，我们将该用户加入qf_users表里面
                            $time = time();
                            $sql = "insert into qf_users (id,openid,hd_time) values(NULL,‘{$fromUsername}‘,‘{$time}‘)";
                            mysql_query($sql,$connect);
                        }
                        
                        //如果对方取消关注了，那么我们就需要从数据库里面删除掉
                        if($postObj->Event == ‘unsubscribe‘){
                            $sql = "delete from qf_users where openid=‘{$fromUsername}‘";
                            mysql_query($sql,$connect);
                        }
                        
                        break;
                    case ‘text‘: //回复文本模块
                        //这里开始测试客服消息接口了
                        if($keyword == ‘文本‘){
                           //获取token
                           require ‘get_token.php‘;
                           $contentStr = ‘这是客服接口的回复，我们可以帮助您什么？‘;
                           //对发送的内容进行urlencode编码，防止中文乱码
                           $contentStr = urlencode($contentStr);
                           //到时候我们我发送的内容我们放到一个数组里面去了
                           $content_arr = array(‘content‘=>"{$contentStr}");
                           //这里的意思是将来我要发送消息给这个用户
                           $reply_arr = array(‘touser‘=>"{$fromUsername}",‘msgtype‘=>‘text‘,‘text‘=>$content_arr);
                           //下一步就是将编码转成规定的json格式
                           $post = json_encode($reply_arr);
                           //url解码，如果不解码他将会发来一段二进制代码
                           $post = urldecode($post);
                           $url = "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={$access_token}";
                           //这里我们来使用类的继承机制，来简化代码
                           $this -> http_request($url,$post);
                           //这里是可以回复多条消息的，只需要在执行下这个函数即可
                           //$this -> http_request($url,$post);
                        }else{
                            $contentStr = ‘您输入的格式有误‘;
                            $resultStr = sprintf($tmp_arr[‘text‘], $fromUsername, $toUsername, $time, $contentStr);
                            echo $resultStr;
                        }
                        break;
                    case ‘image‘: //处理用户上传图片
                        $media_id = $postObj -> MediaId; //获取到用户上传的图片的mediaid
                        $resultStr = sprintf($tmp_arr[‘image‘], $fromUsername, $toUsername, $time, $media_id);
                        echo $resultStr;
                        
                        //将图片保存到本地服务器的文件系统
                        //1.先给图片创建一个名字
                        $image_file_name = time().‘.jpg‘;
                        //2.获取该图片的内容
                        $image_file = file_get_contents($postObj->PicUrl);
                        //3.保存到本地服务器的文件系统
                        //提醒：一定要保证您创建的文件夹是www用户可读可写，否则无法保存该图片到文件夹下
                        file_put_contents("./uploadimage/".$image_file_name,$image_file);
                        
                        //将图片的路径和相关信息入库
                        //1.创建一张表
                        //2.链接mysql数据库，并且添加图片信息
                        $connect = mysql_connect(‘localhost‘,‘root‘,‘root‘);
                        mysql_select_db(‘wxdb‘,$connect);
                        mysql_query(‘set names utf8‘);
                        $media_path = "./uploadimage/".$image_file_name; //路径
                        $sql = "insert into keep_image_uploads (id,openid,media_id,media_path) values(NULL,‘{$fromUsername}‘,‘{$media_id}‘,‘{$media_path}‘)";
                        mysql_query($sql,$connect);
                        break;
                    case ‘voice‘: //处理用户上传语言的业务逻辑
                        $media_id = $postObj -> MediaId; //获取media_id的id号
                        $resultStr = sprintf($tmp_arr[‘voice‘], $fromUsername, $toUsername, $time, $media_id);
                        echo $resultStr;
                        break;
                    case ‘location‘: //处理用户上传的地理位置信息
                        $Location_X = $postObj -> Location_X; //获取上传地理位置的纬度
                        $Location_Y = $postObj -> Location_Y; //获取上传地地理位置经度
                        $contentStr = "您上报的地理位置是:\n经度是：{$Location_Y} \n纬度是: {$Location_X}";
                        $resultStr = sprintf($tmp_arr[‘text‘], $fromUsername, $toUsername, $time, $contentStr);
                        echo $resultStr;
                        break;
                    case ‘link‘: //接收并回复链接信息
                        //获取到用户上传的链接信息
                        $Title = $postObj -> Title;
                        $Url = $postObj -> Url;
                        $contentStr = "<a href=‘{$Url}‘>{$Title}</a>";
                        $resultStr = sprintf($tmp_arr[‘text‘], $fromUsername, $toUsername, $time, $contentStr);
                        echo $resultStr;
                        break;
                        
                }
        }else {
            echo "";
            exit;
        }
    }
        
    private function checkSignature()
    {
        // you must define TOKEN by yourself
        if (!defined("TOKEN")) {
            throw new Exception(‘TOKEN is not defined!‘);
        }
        
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];
                
        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        // use SORT_STRING rule
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
        
        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }
}

//如果这段代码放在上面，那程序将会报错，因为继承的问题，会显示类没有找到
$wechatObj = new wechatCallbackapiTest();
//当接入成功后，请注销这句话，否则，会反复验证。
//$wechatObj->valid();
//添加响应请求的语句
$wechatObj->responseMsg();

?>