微信开发之二:微信绑定后自动回复和获取用户ID与微信平台ID

<?php

namespace Home\Controller;

use Think\Controller;

class IndexController extends Controller {

    public function index(){

       //1,将timestamp，nonce，token按照字典排序
		$timestamp = $_GET['timestamp'];
		$nonce = $_GET['nonce'];
		$token = 'weixin';
		$signature = $_GET['signature'];
		$echostr = $_GET['echostr'];
		$array = array($timestamp,$nonce,$token); 
		sort($array);
		//2,将排序后的三个参数进行拼接后用sha1加密
		$tmpstr = implode('',$array);//join
		$tmpstr = sha1($tmpstr);
		//3,将机密后的字符串与signature进行对比，判断请求是否来自微信
		if($tmpstr == $signature && $echostr){
			//第一次接入weiixn接口的时候
			 echo $_GET['echostr'];
			exit;
		}else{
			$this->reponseMsg();
		}
	}	
	//接收事件推送消息
	public function reponseMsg(){
		//1.获取到微信推送过来的post数据（xml格式）
		$postArr = $GLOBALS['HTTP_RAW_POST_DATA'];
		//2.处理消息类型，并设置回复的类型和内容
		$postObj = simplexml_load_string($postArr);
		// $postObj->ToUserName = '';
		// $postObj->FromUserName = '';
		// $postObj->CreateTime = '';
		// $postObj->Event = '';
		//判1	```````````
		// <xml>
		// <ToUserName>< ![CDATA[toUser] ]></ToUserName>
		// <FromUserName>< ![CDATA[FromUser] ]></FromUserName>
		// <CreateTime>123456789</CreateTime>
		// <MsgType>< ![CDATA[event] ]></MsgType><Event>
		// < ![CDATA[subscribe] ]></Event>
		// </xml>	
		if(strtolower($postObj->MsgType) == 'event'){
			//如果是关注subscribe事件
			if(strtolower($postObj->Event == 'subscribe')){
			//如果是取消关注事件
			//回复用户信息
			$toUser 	= $postObj->FromUserName;
			$fromUser	= $postObj->ToUserName;
			$time 		= time();
			$msgType 	= 'text';
			$content 	= '欢迎关注此微信公众号,用户微信ID:'.$postObj->FromUserName."微信平台ID：".$fromUser;
			$template 	= "<xml> 
						 <ToUserName><![CDATA[%s]]></ToUserName>
						 <FromUserName><![CDATA[%s]]></FromUserName> 
						 <CreateTime>%s</CreateTime>
						 <MsgType><![CDATA[%s]]></MsgType> 
						 <Content><![CDATA[%s]]></Content> 
						 </xml>";
			$info 		= sprintf($template,$toUser,$fromUser,$time,$msgType,$content);
			echo $info;

		}
	
	   }
    }
}