WeChat public account development model PHP interface implementation

<?php
define("TOKEN","你的TOKEN");
class wechatCallBackApi{
    //public $signature;    //加密签名
    //public $timestamp;    //时间戳
    //public $nonce;        //随机数
    //public $echostr;    //随机字符串，返回标志
    public $fromUserName;    //发信人ID
    public $toUserName;        //收信人ID(本公共号)
    public $keyWords;        //文本信息
    public $msgId;        //消息ID
    public $welcomeMsg; //欢迎消息
    public $msgType;    //消息类型
    public $event;        //事件名
    public $mediaId;    //语音消息媒体id，可以调用多媒体文件下载接口拉取该媒体
    public $format;        //语音格式：amr
    public $recognition;    //语音识别结果
    public function __construct(){
        $this->welcomeMsg="HELLO,欢迎订阅！";
            //$this->main();    //*****************第一次验证的时候打开，随后可关闭***************
    }
    //首次TOKEN验证
    public function main(){
        $echoStr=$_GET[&#39;echostr&#39;];
        if($this->checkRes()){
            echo $echoStr;
        }else{
            exit();
        }
    }
    
    //验证权限
    private function checkRes(){
        $signature=$_GET[&#39;signature&#39;];    //获取微信服务发送过来的参数
        $timestamp=$_GET[&#39;timestamp&#39;];
        $nonce=$_GET[&#39;nonce&#39;];
        $token = TOKEN;
        $tmpArr = array($token,$timestamp,$nonce);
        sort($tmpArr);    //进行字典排序
        $strWaitCheck = implode($tmpArr);    //进行字符串组合
        $strWaitCheck = sha1($strWaitCheck);    //对字符串进行sha1加密
        if($strWaitCheck==$signature){
            return true;
        }else{
            return false;
        }
    }
    public function getWhatWeChatServerPost(){
            $huntPostContent = $GLOBALS["HTTP_RAW_POST_DATA"];    //获取微信服务post过来的内容
            $newXmlObj =simplexml_load_string($huntPostContent,&#39;SimpleXMLElement&#39;, LIBXML_NOCDATA);    //把post过的字符串载入对象
            $this->fromUserName = $newXmlObj->FromUserName;    //向公共账号发信息的用户名
            $this->toUserName = $newXmlObj->ToUserName;    //公共账号名
            $this->keyWords = trim($newXmlObj->Content);    //消息内容
            $this->msgId = trim($newXmlObj->MsgId);        //读取当前消息msgId
            $this->msgType = trim($newXmlObj->MsgType);        //读取当前消息类型
            $this->event = trim($newXmlObj->Event);        //读取当前事件名
            
            $this->format = trim($newXmlObj->Format);    //语音格式：amr
            
            $this->mediaId = trim($newXmlObj->MediaID);    //语音消息媒体id，可以调用多媒体文件下载接口拉取该媒体
            
            $this->recognition = trim($newXmlObj->Recognition);    //语音识别结果，UTF8编码
        }
    //消息响应
    public function responseMsg(){
            $this->getWhatWeChatServerPost();    //执行接收微信服务器POST过来的东西
            
                    //当消息类型为text的时候处理
                    if(!empty($this->keyWords)&& $this->msgType == "text"){
                            $para = $this->keyWords;
                            switch($para){
                                    case "1":
                                    $tmp_item = $this->textPicMaxTmp(
                                    "this is a test!!",
                                    "各位大叔大妈别太大较真，这就一测试滴",
                                    "http://www.baidu.com/img/bdlogo.gif",
                                    "http://www.baidu.com/");
                                    $re_global = $this->resTextPicMax($this->fromUserName,$this->toUserName,1,$tmp_item);
                                    echo $re_global;
                                    break;
                                case "2":
                                    $contentResText = "Hello,buddy,you send me a \"2\"[玫瑰]";
                                    $re_global = $this->resTextMsg($this->fromUserName,$this->toUserName,$contentResText);
                                    echo $re_global;
                                    break;
                                    
                                case "000":    
                                    $contentResText = "你想返回的字符串";
                                    $this->longStrHandleExtendfunc($contentResText);
                                    break;                  
                                default:
                                    //调用功能判断函数处理
                                    $this->longStrHandle($para);
                                       break;
                                }
                        }else if($this->msgType == "event" && !empty($this->event)){        //获取事件类型
                                    if($this->event==&#39;subscribe&#39;){
                                            $contentResText = $this->welcomeMsg;    //初次关注的时候推送欢迎消息
                                            $re_global = $this->resTextMsg($this->fromUserName,$this->toUserName,$contentResText);
                                        }else if($this->event == "unsubscribe"){///这个地方好像没有作用！！！
                                            $contentResText = "我擦，你咋跑了";
                                            $re_global = $this->resTextMsg($this->fromUserName,$this->toUserName,$contentResText);
                                            }
                            }else if($this->msgType == "voice"){
                                        if($this->recognition == ""){
                                                $contentResText ="亲，你说的火星文么，听不懂，建议您还是文字查询吧..[呲牙]";//语音无返回结果的时候给用记返回一条错误
                                                $re_global = $this->resTextMsg($this->fromUserName,$this->toUserName,$contentResText);
                                            }else{
                                                $contentResText =$this->recognition; //其它情况下返回欢迎语
                                                $re_global = $this->resTextMsg($this->fromUserName,$this->toUserName,$contentResText);
                                                    
                                                }
                                    
                                }else{
                            //如果在text情况意外得到一条空消息的处理
                            echo "";
                            exit();
                            }
                    echo $re_global;    //返回值给微信服务器
        }
            
            //多次用到的几句话就定义了一个小方法
            public function longStrHandleExtendfunc($conText){
                    $re_global = $this->resTextMsg($this->fromUserName,$this->toUserName,$conText);
                    echo $re_global;
                }
                
            //收到除特定字符外的其它字符的处理方法，这个要根据你需要的具体逻辑处理    
            public function longStrHandle($waitHandleStr){
                    /*
                        your code
                    */
                            }
        //回复文本信息方法
        public function resTextMsg($tu,$fu,$textContent){
                //文本消息模板
                    $textTpl = "<xml>
                            <ToUserName><![CDATA[%s]]></ToUserName>
                            <FromUserName><![CDATA[%s]]></FromUserName>
                            <CreateTime>%s</CreateTime>
                            <MsgType><![CDATA[%s]]></MsgType>
                            <Content><![CDATA[%s]]></Content>
                            <FuncFlag>0</FuncFlag>
                            </xml>";
                    $msgType = "text";    //消息类型
                    $time = time();        //时间戳
                    $resServerStr = sprintf($textTpl,$tu,$fu,$time,$msgType,$textContent);    //替换模板里的内容
                    return $resServerStr;
            }
        //回复图文
        public function resTextPicMax($tu,$fu,$itemNum,$totalItemStr){
                //图片模板
                    $picTpl = "<xml>
                                     <ToUserName><![CDATA[%s]]></ToUserName>
                                     <FromUserName><![CDATA[%s]]></FromUserName>
                                     <CreateTime>%s</CreateTime>
                                     <MsgType><![CDATA[%s]]></MsgType>
                                     <ArticleCount>%s</ArticleCount>
                                     <Articles>"
                                    .$totalItemStr.
                                     "</Articles>
                                 </xml>";
                    $msgType = "news";    //消息类型
                    $time = time();        //时间戳
                    $resServerStr = sprintf($picTpl,$this->fromUserName,$this->toUserName,$time,$msgType,$itemNum);    //替换模板里的内容
                    return $resServerStr;
            }
            //图文模板处理
            public function textPicMaxTmp($title,$des,$picUrl,$jumpUrl){
                    //图文消息条目模板
                $itemTpl="
                         <item>
                                     <Title><![CDATA[%s]]></Title>
                                     <Description><![CDATA[%s]]></Description>
                                     <PicUrl><![CDATA[%s]]></PicUrl>
                                     <Url><![CDATA[%s]]></Url>
                                     </item>
                ";
                $resItemStr = sprintf($itemTpl,$title,$des,$picUrl,$jumpUrl);    //替换模板里的内容
                return $resItemStr;
                }
            //接下来就是你自己定义的各种方法
            
      
}