微信开发平台开发初探

<?php /**  * wechat php test  *///define your tokendefine("TOKEN", "weixin");//此时你的微信公众平台的token即为weixin$wechatObj = new wechatCallbackapiTest();$wechatObj->valid();class wechatCallbackapiTest{public function valid()    {        $echoStr = $_GET["echostr"];        //valid signature , option        if($this-&gt;checkSignature()){        	echo $echoStr;        	exit;        }    }    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)){                              	$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);                $fromUsername = $postObj-&gt;FromUserName;                $toUsername = $postObj-&gt;ToUserName;                $keyword = trim($postObj-&gt;Content);                $time = time();                $textTpl = "<xml><tousername></tousername><fromusername></fromusername><createtime>%s</createtime><msgtype></msgtype><content></content><funcflag>0</funcflag></xml>";             			if(!empty( $keyword ))                {              		$msgType = "text";                	$contentStr = "Welcome to wechat world!";                	$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);                	echo $resultStr;                }else{                	echo "Input something...";                }        }else {        	echo "";        	exit;        }    }	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;	}}}?&gt;