微信公众号开发之文本消息自动回复,以及系统关注自动回复，php代码

<?php
/**
 * tpshop
 * ============================================================================
 * * 版权所有 2015-2027 深圳搜豹网络科技有限公司，并保留所有权利。
 * 网站地址: http://www.tp-shop.cn
 * ----------------------------------------------------------------------------
 * 这不是一个自由软件！您只能在不用于商业目的的前提下对程序代码进行修改和使用 .
 * 不允许对程序代码以任何形式任何目的的再发布。
 * ============================================================================
 * 微信交互类
 */ 
namespace Home\Controller;
use Think\Controller;
class WeixinController extends BaseController {
    public $client;
    public $wechat_config;
    public function _initialize(){
        parent::_initialize();
        //获取微信配置信息
        $this->wechat_config = M(‘wx_user‘)->find();        
        $options = array(
             ‘token‘=>$this->wechat_config[‘w_token‘], //填写你设定的key
             ‘encodingaeskey‘=>$this->wechat_config[‘aeskey‘], //填写加密用的EncodingAESKey
             ‘appid‘=>$this->wechat_config[‘appid‘], //填写高级调用功能的app id
             ‘appsecret‘=>$this->wechat_config[‘appsecret‘], //填写高级调用功能的密钥
                );

    }

    public function oauth(){

    }
    
    public function index(){
        if($this->wechat_config[‘wait_access‘] == 0)        
            exit($_GET["echostr"]);
        else        
            $this->responseMsg();
    }    
    
    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))                     
            exit("");
         
                /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
                   the best way is to check the validity of xml by yourself */
                libxml_disable_entity_loader(true);
                  $postObj = simplexml_load_string($postStr, ‘SimpleXMLElement‘, LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
                $time = time();
                $keyword = trim($postObj->Content);
                $msgtype = ‘text‘; //消息类型：文本
                $textTp1sys = "<xml>
                <ToUserName><![CDATA[%s]]></ToUserName>
                <FromUserName><![CDATA[%s]]></FromUserName>
                <CreateTime>%s</CreateTime>
                <MsgType><![CDATA[%s]]></MsgType>
                <Content><![CDATA[%s]]></Content>
                </xml>";
                $textTpl2sys = "<xml>
                            <ToUserName><![CDATA[%s]]></ToUserName>
                            <FromUserName><![CDATA[%s]]></FromUserName>
                            <CreateTime>%s</CreateTime>
                            <MsgType><![CDATA[%s]]></MsgType>
                            <ArticleCount><![CDATA[%s]]></ArticleCount>
                            <Articles>
                                <item>
                                    <Title><![CDATA[%s]]></Title> 
                                    <Description><![CDATA[%s]]></Description>
                                    <PicUrl><![CDATA[%s]]></PicUrl>
                                    <Url><![CDATA[%s]]></Url>
                                </item>                               
                            </Articles>
                            </xml>";
        //点击菜单拉取消息时的事件推送
                /*
                 * 1、click：点击推事件
                 * 用户点击click类型按钮后，微信服务器会通过消息接口推送消息类型为event的结构给开发者（参考消息接口指南）
                 * 并且带上按钮中开发者填写的key值，开发者可以通过自定义的key值与用户进行交互；
                 */
                if($postObj->MsgType == ‘event‘ && $postObj->Event == ‘CLICK‘)
                {
                    $keyword = trim($postObj->EventKey);
                }

        /*系统关注,回复*/
        if($postObj->MsgType == ‘event‘) {
            if ($postObj->Event == ‘subscribe‘) { //如果是订阅事件
                $sys = M(‘wx_sys‘)->where("status=1")->find();
                if($sys) {
                    $keyw=$sys[‘key‘];
                    if($sys[‘type‘]==1){
                        $wx_text = M(‘wx_text‘)->where("keyword like ‘%$keyw%‘")->find();
                        if ($wx_text) {
                            $contentStr = $wx_text[‘text‘];
                            $resultStr = sprintf($textTp1sys, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
                            echo $resultStr;
                            exit();
                        }
                    }else{
                        $wx_img = M(‘wx_img‘)->where("keyword like ‘%$keyword%‘")->find();
                        if($wx_img) {
                            $resultStr = sprintf($textTpl2sys, $fromUsername, $toUsername, $time, ‘news‘, ‘1‘, $wx_img[‘title‘], $wx_img[‘desc‘]
                                , $wx_img[‘pic‘], $wx_img[‘url‘]);
                            exit($resultStr);
                        }
                    }
                }
            }
        }
        if(empty($keyword))
                    exit("Input something...");
                // 图文回复
                $wx_img = M(‘wx_img‘)->where("keyword like ‘%$keyword%‘")->find();
                if($wx_img)
                {
                    $textTpl = "<xml>
                                <ToUserName><![CDATA[%s]]></ToUserName>
                                <FromUserName><![CDATA[%s]]></FromUserName>
                                <CreateTime>%s</CreateTime>
                                <MsgType><![CDATA[%s]]></MsgType>
                                <ArticleCount><![CDATA[%s]]></ArticleCount>
                                <Articles>
                                    <item>
                                        <Title><![CDATA[%s]]></Title> 
                                        <Description><![CDATA[%s]]></Description>
                                        <PicUrl><![CDATA[%s]]></PicUrl>
                                        <Url><![CDATA[%s]]></Url>
                                    </item>                               
                                </Articles>
                                </xml>";                                        
                    $resultStr = sprintf($textTpl,$fromUsername,$toUsername,$time,‘news‘,‘1‘,$wx_img[‘title‘],$wx_img[‘desc‘]
                            , $wx_img[‘pic‘], $wx_img[‘url‘]);
                    exit($resultStr);                   
                }
                
                // 文本回复
                $wx_text = M(‘wx_text‘)->where("keyword like ‘%$keyword%‘")->find();
                if($wx_text)
                {
                    $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>";
                    $contentStr = $wx_text[‘text‘];
                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, ‘text‘, $contentStr);
                    exit($resultStr);
                }

                // 其他文本回复                
                    $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>";                    
                    $contentStr = ‘欢迎来到TPshop商城!‘;
                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, ‘text‘, $contentStr);
                    exit($resultStr);                   
      
    }    
}