微信 关注/取消关注事件

<?php  
/** 
  * wechat php test 
  */  
  
//define your token  
define("TOKEN", "weixin");  
$wechatObj = new wechatCallbackapiTest();  
//$wechatObj->valid();  
if(!isset($_GET["echostr"])){  
     $wechatObj->responseMsg();  
}else{  
 $wechatObj->valid();  
}  
  
class wechatCallbackapiTest  
{  
    public function valid()  
    {  
        $echoStr = $_GET["echostr"];  
        if($this->checkSignature()){  
            echo $echoStr;  
            //$this->responseMsg();  
            exit;  
        }  
    }  
  
    public function responseMsg()  
    {  
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];  
          
        if (!empty($postStr)){  
        $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);  
        $RX_TYPE = trim($postObj->MsgType);  
                switch($RX_TYPE)  
                {  
                    case "text":  
                        $resultStr = $this->handleText($postObj);  
                        break;  
                    case "event":  
                        $resultStr = $this->handleEvent($postObj);  
                        break;  
                    default:  
                        $resultStr = "Unknow msg type: ".$RX_TYPE;  
                        break;  
                }  
                echo $resultStr;  
                //$fromUsername = $postObj->FromUserName;  
                //$toUsername = $postObj->ToUserName;  
                //$keyword = trim($postObj->Content);  
                //$time = time();  
                //$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>";               
                //if(!empty( $keyword ))  
                //{  
                //  $msgType = "text";  
                //  $contentStr = "你好啊，屌丝1";  
                //  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);  
                //  echo $resultStr;  
                //}else{  
                //  echo "你好啊，屌丝1";  
                //}  
  
        }else {  
            echo "";  
            exit;  
        }  
    }  
    public function handleEvent($object)  
    {  
        $contentStr = "";  
        switch ($object->Event)  
        {  
            case "subscribe":  
                $contentStr = "感谢您关注【微卖】"."n"."我们为您提供全国各地的生活指南，做最好的外卖微信平台。"."n"."目前平台功能如下："."n"."【1】 查天气，如输入：本地天气"."n"."【2】 查公交，如输入：本地公交178"."n"."【3】 翻译，如输入：翻译I love you"."n"."【4】 本地信息查询，如输入："."n"."更多内容，敬请期待...";  
                break;  
            default :  
                $contentStr = "Unknow Event: ".$object->Event;  
                break;  
        }  
        $resultStr = $this->responseText($object, $contentStr);  
        return $resultStr;  
    }  
      
    public function responseText($object, $content, $flag=0)  
    {  
        $textTpl = "<xml>  
                    <ToUserName><![CDATA[%s]]></ToUserName>  
                    <FromUserName><![CDATA[%s]]></FromUserName>  
                    <CreateTime>%s</CreateTime>  
                    <MsgType><![CDATA[text]]></MsgType>  
                    <Content><![CDATA[%s]]></Content>  
                    <FuncFlag>%d</FuncFlag>  
                    </xml>";  
        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);  
        return $resultStr;  
    }  
      
      
  
    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 );  
        return true;  
        if( $tmpStr == $signature ){  
            return true;  
        }else{  
            return false;  
        }  
    }  
}  
  
?>