微信被动回复用户消息功能——关注、取消

参考资料：http://mp.weixin.qq.com/wiki/1/6239b44c206cab9145b1d52c67e6c551.html

注意：微信公众号必须开启开发者模式才能使用

代码：

  

<?php
namespace Mob\Controller;
use Think\Controller;

class WxReplayController extends Controller{

    protected function _initialize() {
         /* 读取站点配置 */
        $config = api('Config/lists');
        C($config); //添加配置
//      define("TOKEN", "zkfhao2014");  // 深圳小喇叭
        define("TOKEN", C('WX_TOKEN'));
    }
    function index(){
        if(isset($_GET["echostr"])){
            $this->valid();
        }
        $this->responseMsg();

    }


    //  ==================================
    //  = 微信开发者模式开启 验证方法 =
    //  ==================================
    function valid(){
        $echoStr = $_GET["echostr"];
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }

    public function responseMsg(){
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

        //extract post data
        if (!empty($postStr)){

                $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $event = $postObj->Event;
                $id = $postObj->MsgId;  //消息id，64位整型
                $fromUsername = $postObj->FromUserName; // openid
                $toUsername = $postObj->ToUserName; //开发者微信号
                $keyword = trim($postObj->Content);//消息内容
                $time = $postObj->CreateTime; //消息创建时间 （整型）
                $msgType = $postObj->MsgType;  //text/image/link/music/news/location/...类型

                switch ($msgType){
                    //接收到某个事件
                    case 'event' :
                        //关注 (取消unsubscribe)
                        if($event == 'subscribe'){
                            if (isset($postObj->EventKey)){
                                $cont = "关注二维码场景 ".$postObj->EventKey.$toUsername.'呢称：'.$fromUsername;
                                echo $result = $this->_response_multiText($postObj,$cont);
                            }

                            // 新闻列表消息
                            $record = array();

                            $paramArr = array("open_id"=>end($fromUsername));
                            $res = post_return($paramArr, 'NewUser', 'getuseropenid',"2");

                            $paramArr = array('uid'=>max(0,$res['data']['uid']),'type'=>1);
                            $goods_res = post_return($paramArr, 'Player', 'get_user_zhubo_list',"2");
                            $goods_info = $goods_res['data']['lst'];
                            $goods_info = end($goods_info);
                            // 如果有关注的直播间
                            if( max(0,$goods_res['data']['total']) > 0 ){
                                $record[]=array(
                                    'title' =>$goods_info['gname'],
                                    'description' =>$goods_info['gname'],
                                    'picUrl' => $goods_info['fig'],
                                    'url' =>C('HOOTS_URL').'/Mob/Chat/index_o/gid/'.$goods_info['gid'],
                                );
                            }
                           

                           echo $result = $this->_response_multiNews($postObj,$record);
                        }
                        // 扫描二维码
                        if($event == 'SCAN'){
//                          $cont = "关注二维码场景 ".$postObj;
//                          echo $result = $this->_response_multiText($postObj,$cont);
                        }
                        break ;

                    // 地理位置
                    case "LOCATION":
                        $cont = "纬度 ".$postObj->Latitude." 经度".$postObj->Longitude;
                        $result = $this->_response_multiText($postObj,$cont);
                        break;

                    // 文本消息
                    case "LOCATION":
                        $cont = "您输入的是文字类型";
                        $result = $this->_response_multiText($postObj,$cont);
                        break;
                    // 默认
                    default:
                         $cont = '你好！'; 
                        echo $result = $this->_response_multiText($postObj,$cont);
                        break;
                }

        }else {
            echo "";
            exit;
        }
    }

    //  ============
    //  = 验证 =
    //  ============
    private function checkSignature(){

        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];

        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );

        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }

    //  ============================
    //  = 发送文本消息 =
    //  ============================
    function _response_multiText($object,$contentStr){
        $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>";
        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), 'text', $contentStr);
        return $resultStr;
    }

    //  ========================================
    //  = 发送图文消息（点击跳转到外链）=
    //  = 图文消息条数限制在8条以内，=
    //  = 注意，如果图文数超过8，则将会无响应 =
    //  ========================================
    function _response_multiNews($object,$newsContent){
        $newsTplHead = "<xml>
                        <ToUserName><![CDATA[%s]]></ToUserName>
                        <FromUserName><![CDATA[%s]]></FromUserName>
                        <CreateTime>%s</CreateTime>
                        <MsgType><![CDATA[news]]></MsgType>
                        <ArticleCount>%s</ArticleCount>
                        <Articles>";
        $newsTplBody = "<item>
                        <Title><![CDATA[%s]]></Title>
                        <Description><![CDATA[%s]]></Description>
                        <PicUrl><![CDATA[%s]]></PicUrl>
                        <Url><![CDATA[%s]]></Url>
                        </item>";
        $newsTplFoot = "</Articles>
                        <FuncFlag>0</FuncFlag>
                        </xml>";

        $bodyCount = count($newsContent);
        $bodyCount = $bodyCount < 10 ? $bodyCount : 10;

        $header = sprintf($newsTplHead, $object->FromUserName, $object->ToUserName, time(), $bodyCount);

        foreach($newsContent as $key => $value){
            $body .= sprintf($newsTplBody, $value['title'], $value['description'], $value['picUrl'], $value['url']);
        }

        $FuncFlag = 0;
        $footer = sprintf($newsTplFoot, $FuncFlag);

        return $header.$body.$footer;
    }


}