<?php 

class Weixin extends My_Controller

{

    public function __construct()

    {

        parent::__construct();

        define('TOKEN','123456');            //定义常量

    }

   public function test()

   {

      header("Content-type:text/html;charset=utf-8");

      if (!isset($_GET['echostr']))

      {

          $this->responseMsg();

      }

      else

      {

          $this->valid();

      }

   }

   public function valid()

   {

      $echostr = $_GET["echostr"];

      if($this->check()){

         header("Content-type:text");

         ob_clean();

         echo $echostr;                    //开发者模式接收到$echostr,再输出回去

         exit;

      }

   }

   public function check()

  {

        $signature = $_GET["signature"];

        $timestamp = $_GET["timestamp"];

        $nonce = $_GET["nonce"];  

        $token = TOKEN;

        $tmpArr = array($token, $timestamp, $nonce);

        sort($tmpArr, SORT_STRING);       //排序

        $tmpStr = implode( $tmpArr );     //数组变成字符串

        $tmpStr = sha1( $tmpStr );        //sha1加密

        if( $tmpStr == $signature ){

          return true;

        }else{

          return false;

        }

  }

    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 = $this->receiveText($postObj);

                    break;

                case "event":

                    $resultStr = $this->receiveEvent($postObj);

                    break;

                default:

                    $resultStr = "";

                    break;

            }

            echo $resultStr;

        }else {

            echo "";

            exit;

        }

    }

    private function receiveText($object)

    {

        $funcFlag = 0;

        $contentStr = "你发送的内容为：".$object->Content;

        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);

        return $resultStr;

    }

    private function receiveEvent($object)

    {

        $contentStr = "";

        switch ($object->Event)

        {

            case "subscribe":

                $contentStr = "欢迎关注逍游";

            case "unsubscribe":

                break;

            case "CLICK":

                switch ($object->EventKey)

                {

                    case "company":

                        $contentStr[] = array("Title" =>"公司简介",

                        "Description" =>"逍游提供好玩的手游",

                        "PicUrl" =>"http://gameapi.xiaoyou-game.com/images/example.jpg",

                        "Url" =>"http://xiaoyou-game.com");

                        break;

                    case "game":

                        $contentStr[] = array("Title" =>"星座召唤",

                        "Description" =>"八十八星座来袭，你是什么座？",

                        "PicUrl" =>"http://gameapi.xiaoyou-game.com/images/example.jpg",

                        "Url" =>"http://xzzh.xiaoyou-game.com");

                        break;

                    case "dhm":

                        $contentStr[] = array("Title" =>"礼包兑换码",

                        "Description" =>"快点击领取游戏礼包兑换码吧~",

                        "PicUrl" =>"http://gameapi.xiaoyou-game.com/images/example.jpg",

                        "Url" =>"http://xzzh.xiaoyou-game.com/web/list/lbdhm.shtml");

                        break;

                    default:

                        $contentStr[] = array("Title" =>"默认菜单回复",

                        "Description" =>"您正在使用的是自定义菜单测试接口",

                        "PicUrl" =>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg",

                        "Url" =>"weixin://addfriend/pondbaystudio");

                        break;

                }

                break;

            default:

                break;      

        }

        if (is_array($contentStr)){

            $resultStr = $this->transmitNews($object, $contentStr);

        }else{

            $resultStr = $this->transmitText($object, $contentStr);

        }

        return $resultStr;

    }

    private function transmitText($object, $content, $funcFlag = 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, $funcFlag);

        return $resultStr;

    }

    private function transmitNews($object, $arr_item, $funcFlag = 0)

    {

        //首条标题28字，其他标题39字

        if(!is_array($arr_item))

            return;

        $itemTpl = "    <item>

        <Title><![CDATA[%s]]></Title>

        <Description><![CDATA[%s]]></Description>

        <PicUrl><![CDATA[%s]]></PicUrl>

        <Url><![CDATA[%s]]></Url>

        </item>

        ";

        $item_str = "";

        foreach ($arr_item as $item)

            $item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['PicUrl'], $item['Url']);

        $newsTpl = "<xml>

        <ToUserName><![CDATA[%s]]></ToUserName>

        <FromUserName><![CDATA[%s]]></FromUserName>

        <CreateTime>%s</CreateTime>

        <MsgType><![CDATA[news]]></MsgType>

        <Content><![CDATA[]]></Content>

        <ArticleCount>%s</ArticleCount>

        <Articles>

        $item_str</Articles>

        <FuncFlag>%s</FuncFlag>

        </xml>";

        $resultStr = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($arr_item), $funcFlag);

        return $resultStr;

    }

}