php公众号自动回复机器人

作为一个php新手,更是第一次开发公众号,为了给女票一些便利,闲暇时间能有得玩,便想做一个专属的公众号,刚开始用的python 奈何,坑太多..上手太慢了,还是转战世界上最好的语言PHP(不要打脸),爬了N朵代码,终于成功,废话不多说,直接上代码.
<pre>
<?php
//token 自己定义
define("TOKEN", "shuiyun");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();
if (isset($_GET['echostr'])) {
$wechatObj -> valid();
} else {
$wechatObj -> responseMsg();
}

class wechatCallbackapiTest
{
public function valid()
{
$echoStr = $_GET["echostr"];

    //valid signature , option
    if($this->checkSignature()){
        header('content-type:text');
        echo $echoStr;
        exit;
    }
}

public function responseMsg()
{
    $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

    if (!empty($postStr)){
        
               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 = "<xml>
                        <ToUserName><![CDATA[%s]]></ToUserName>
                        <FromUserName><![CDATA[%s]]></FromUserName>
                        <CreateTime>%s</CreateTime>
                        <MsgType><![CDATA[%s]]></MsgType>
                        <Content><![CDATA[%s]]></Content>
                        <FuncFlag>0</FuncFlag>
                        </xml>";             
            if(!empty( $keyword ))
            {
                $msgType = "text";
                
                if($keyword=="功能"){
                    $contentStr = "查询快递123456789\n讲个笑话\n讲个故事\n成语接龙一诺千金\n北京天气\n今天北京到上海的飞机\n今天北京到上海的火车\n天安门到王府井的公交有哪些\n北京的邮编\n脑筋急转弯\n影视搜索\n等等";
                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                    echo $resultStr;
                }else{
                        $apiKey = "36f74a73b1084469a168858d9922f01f";
                    $apiURL = "http://www.tuling123.com/openapi/api?key=KEY&info=INFO";
                    $reqInfo = $keyword;
                    $url = str_replace("INFO", $reqInfo, str_replace("KEY", $apiKey, $apiURL));
                    $res = file_get_contents($url);
                    $contentStr = json_decode($res)->text;
                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                    echo $resultStr;
                }
            }else{
                echo "你还想要我怎样?";
            }

    }else {
        echo "";
        exit;
    }
}
    
private function checkSignature()
{
    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, $nonce);
    sort($tmpArr, SORT_STRING);
    $tmpStr = implode( $tmpArr );
    $tmpStr = sha1( $tmpStr );
    
    if( $tmpStr == $signature ){
        return true;
    }else{
        return false;
    }
}

}

?>
</pre>
用的是图灵机器人免费版