微信被动回复用户消息功能——关注、取消

<?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;
}

}