default.php

<?php 
$wechatObj = new Wechat();
$wechatObj->getMsg();
//$wechatObj->valid();
class Weixin 
{ 
	public $token = '';        //token 
	public $debug = false;     //是否debug的状态标示，方便我们在调试的时候记录一些中间数据 
	public $setFlag = false; 
	public $msgtype = 'text';  //('text','image','location') 
	public $msg = array(); 
 
	public function __construct($token,$debug) 
	{ 
		$this->token = $token; 
		$this->debug = $debug; 
	}
	
	//获得用户发过来的消息（消息内容和消息类型 ） 
	public function getMsg() 
	{ 
		$postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; 
		if ($this->debug) { 
			$this->write_log($postStr); 
		} 
		if (!empty($postStr)) { 
			$this->msg = (array)simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); 
			$this->msgtype = strtolower($this->msg['MsgType']); 
		} 
	}
	
	//回复文本消息 
	public function makeText($text='') 
	{ 
		$CreateTime = time(); 
		$FuncFlag = $this->setFlag ? 1 : 0; 
		$textTpl = "<xml> 
		<ToUserName><![CDATA[{$this->msg['FromUserName']}]]></ToUserName> 
		<FromUserName><![CDATA[{$this->msg['ToUserName']}]]></FromUserName> 
		<CreateTime>{$CreateTime}</CreateTime> 
		<MsgType><![CDATA[text]]></MsgType> 
		<Content><![CDATA[%s]]></Content> 
		<FuncFlag>%s</FuncFlag> 
		</xml>"; 
		return sprintf($textTpl,$text,$FuncFlag); 
	}
	
	//根据数组参数回复图文消息 
	public function makeNews($newsData=array()) 
	{ 
		$CreateTime = time(); 
		$FuncFlag = $this->setFlag ? 1 : 0; 
		$newTplHeader = "<xml> 
		<ToUserName><![CDATA[{$this->msg['FromUserName']}]]></ToUserName> 
		<FromUserName><![CDATA[{$this->msg['ToUserName']}]]></FromUserName> 
		<CreateTime>{$CreateTime}</CreateTime> 
		<MsgType><![CDATA[news]]></MsgType> 
		<Content><![CDATA[%s]]></Content> 
		<ArticleCount>%s</ArticleCount><Articles>"; 
		$newTplItem = "<item> 
		<Title><![CDATA[%s]]></Title> 
		<Description><![CDATA[%s]]></Description> 
		<PicUrl><![CDATA[%s]]></PicUrl> 
		<Url><![CDATA[%s]]></Url> 
		</item>"; 
		$newTplFoot = "</Articles> 
		<FuncFlag>%s</FuncFlag> 
		</xml>"; 
		$Content = ''; 
		$itemsCount = count($newsData['items']); 
		$itemsCount = $itemsCount < 10 ? $itemsCount : 10;//微信公众平台图文回复的消息一次最多10条 
		if ($itemsCount) { 
			foreach ($newsData['items'] as $key => $item) { 
				if ($key<=9) { 
					$Content .= sprintf($newTplItem,$item['title'],$item['description'],$item['picurl'],$item['url']); 
				} 
			} 
		} 
		$header = sprintf($newTplHeader,$newsData['content'],$itemsCount); 
		$footer = sprintf($newTplFoot,$FuncFlag); 
		return $header . $Content . $footer; 
	} 
	
	public function reply($data) 
	{ 
		if ($this->debug) { 
			$this->write_log($data); 
		} 
		echo $data; 
	} 
	
	public function valid() 
	{ 
		if ($this->checkSignature()) { 
			if( $_SERVER['REQUEST_METHOD']=='GET' ) 
			{ 
				echo $_GET['echostr']; 
				exit; 
			} 
			}else{ 
				write_log('认证失败'); 
				exit; 
		} 
	} 
	
	private function checkSignature() 
	{ 
		$signature = $_GET["signature"]; 
		$timestamp = $_GET["timestamp"]; 
		$nonce = $_GET["nonce"]; 
		 
		$tmpArr = array($this->token, $timestamp, $nonce); 
		sort($tmpArr); 
		$tmpStr = implode( $tmpArr ); 
		$tmpStr = sha1( $tmpStr ); 
		 
		if( $tmpStr == $signature ){ 
			return true; 
		}else{ 
			return false; 
		} 
	} 
	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;
		}
	}
	
	private function write_log($log){
		//这里是你记录调试信息的地方 请自行完善 以便中间调试
	} 
} 
?>