夺命雷公狗---微信开发02----了解下微信公众平台

 valid();
$wechatObj->responseMsg();

Logger::writeTestLog(json_encode($_GET));

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"];

        Logger::writeTestLog("postStr" . $postStr);

          //extract post data
        if (!empty($postStr)){
                /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
                   the best way is to check the validity of xml by yourself */
                libxml_disable_entity_loader(true);
                  $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
                $keyword = trim($postObj->Content);
                $time = time();
                $textTpl = "
                             
                             
                            %s
                             
                             
                            0
                            ";             
                if(!empty( $keyword ))
                {
                      $msgType = "text";
                    
                    if ($keyword == '你好' or $keyword == '您好' or $keyword == 'hello' or $keyword == '好') {
                        $contentStr = '您好！';
                    } else if ($keyword == '北京') {
                        $contentStr = '北京是中华人民共和国的首都！';
                    } else if (preg_match('/^.*天气.*$/', $keyword)) {
                        $contentStr = "北京今天天气不错，我们下午没有课！";
                    } else {
                        $contentStr = "感谢您对双哥PHP的关注与支持!"; //默认的回复
                    }
                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                    echo $resultStr;
                }else{
                    echo "Input something...";
                }

        }else {
            echo "";
            exit;
        }
    }
        
    private function checkSignature()
    {
        // you must define TOKEN by yourself
        if (!defined("TOKEN")) {
            throw new Exception('TOKEN is not defined!');
        }
        
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];
                
        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        // use SORT_STRING rule
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
        
        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }
}