用过微信大众账号的要小心了

/**

  * wechat php test

  */



//define your token

define("TOKEN", "weixin");

$wechatObj = new wechatCallbackapiTest();

$wechatObj->valid();



class wechatCallbackapiTest

{

	public function valid()

    {

        $echoStr = $_GET["echostr"];



        //valid signature , option

        if($this->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->FromUserName;

                $toUsername = $postObj->ToUserName;

                $keyword = trim($postObj->Content);

                $time = time();

                $textTpl = "

							

							

							%s

							

							

							0

							";             

				if(!empty( $keyword ))

                {

              		$msgType = "text";

                	$contentStr = "Welcome to wechat world!";

                	$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);

                	echo $resultStr;

                }else{

                	echo "Input something...";

                }