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最新推荐文章于 2024-11-20 10:24:27 发布

King_XiaoBlog

最新推荐文章于 2024-11-20 10:24:27 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/King_XiaoBlog/article/details/52926218

本文介绍了一种使用PHP实现微信公众号接入的方法。通过定义TOKEN并验证签名确保安全性，然后解析接收到的消息进行响应。对于不同的消息内容，文章展示了如何调用第三方API获取回复内容。

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/*<?php
/**
* wechat php test
*/

//define your token
define("TOKEN", "yanyanweixin");
$wechatObj = new wechatCallbackapiTest();
$wechatObj->valid();

class wechatCallbackapiTest
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];
        //echo $this->checkSignature();
        //valid signature , option
        if($this->checkSignature()){
            echo $echoStr;
            $this->responseMsg();
            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)){
                /* 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 = "<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( $keyword ))
                {
                    if($keyword=='你好吗'){
                        $contentStr = "我很好,你呢";
                    }else{
                        //$contentStr = $keyword;
                        $url="http://www.tuling123.com/openapi/api?key=954d150bd3a78983dc9eeef2311ff194&info=".$keyword;
                        $json=file_get_contents($url);
                        $arr=json_decode($json,true);
                        $contentStr =$arr['text'];
                    }
                      $msgType = "text";

                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                    echo $resultStr;
                }else{
                    $msgType = "text";
                    $contentStr = "欢迎首次关注张艳艳";
                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                    echo $resultStr;
                    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"];
        /* $signature = "fc7225498730d498467f3e8f55a775aaf4c0fc3c";
        $timestamp = '123';
        $nonce = '456';
*/

        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        // use SORT_STRING rule
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
        //return $tmpStr;
        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }
}

?>*/ -->