<?phpnamespace?app\index\controller;class?Index{
????public?function?index()????{????????
????//1.將timestamp,nonce,toke按字典順序排序??		
????$timestamp?=?$_GET['timestamp'];??		
????$nonce?=?$_GET['nonce'];??		
????$token?=?'weixin';??		
????$signature?=?$_GET['signature'];??		
????$array?=?array($timestamp,$nonce,$token);??		
????//2.將排序后的三個參數拼接之后用sha1加密??		
????$tmpstr?=?implode('',$array);??		
????$tmpstr?=?sha1($tmpstr);??		
????//3.將加密后的字符串與signature進行對比，判斷該請求是否來自微信??		
????if($tmpstr?==?$signature?&&?$_GET['echostr']){		????
????header('content-type:text');		??????
????//?第一次接入微信API接口		????
????echo?$_GET['echostr'];??		????
????exit;??		
????}?else{
????	$this->responseMsg();		}????}????
????	/*接受事件推送并回復*/????
????	public?function?responseMsg()????{			
????	$postArr?=?file_get_contents("php://input");	????????
????	libxml_disable_entity_loader(true);	????????
????	$postObj?=?simplexml_load_string($postArr,?'SimpleXMLElement',?LIBXML_NOCDATA);			
????	//?判斷該數據包是否是訂閱的時間推送			
????	if(strtolower($postObj->MsgType)?==?'event'){				
????	//?如果是關注subscribe事件				
????	if(strtolower($postObj->Event)?==?'subscribe'){					
????	//?回復用戶信息					
????	$toUser?=?$postObj->FromUserName;					
????	$fromUser?=?$postObj->ToUserName;					
????	$time?=?time();					
????	$Msgtype?=?'text';					
????	//?$Content?=?'相信自己，你的選擇是對的。';					
????	$Content?=?'相信自己,你的選擇是對的';					
????	$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,$Content);
????	//后面的值將會按順序填到$template里面的%s					
????	echo?$info;				}			}????}}