Relevant explanation of WeChat remote control server for PHP development

WeChat public good development is very popular, and small programs are even more popular. The editor will share with you an example code of WeChat remote control server for PHP development. Friends who need it can refer to it

Summary

WeChat public Good development is very popular, and small programs are even more popular. So I joined in the fun and gave it a try.

The general functions are still there, but they are incomplete and I have not dealt with many places. But for communication in plain text, there is no problem.

#Environment setup

Let’s briefly talk about the principles of WeChat public accounts. Maybe my understanding is not in place. If there is something wrong, I welcome criticism and advice.

The client sends a request to the WeChat platform, and the WeChat platform forwards the request to the private server. After being handed over to the program for processing, the processing results of the private server are obtained and then fed back to the client.

Of course, the “WeChat Public Platform” plays a core role in this. It is equivalent to providing a stage, a platform that allows talented people and strangers to show their own characteristics. In fact, this is not only true for WeChat, but also for Alibaba, so that major e-commerce companies can show their talents.

Open configuration

The first step is to apply for a WeChat developer account. For individuals, it is enough to choose a subscription account. There is a lot of relevant information on the Internet and it is very detailed, so I won’t go into details. Let’s get straight to the point.

After successfully logging in to the developer account, you can open the server-side settings, as shown below

The activation is completed, and you can set it according to the situation of your own server. Can.

• URL is the address used by your private server to process request data

• TOKEN is a token, set it casually. But remember that you will use it in your own code later.

• As for the key, it has no major use, so you can leave it alone for now.

Setting on demand

After setting, you can enable it. This is like having all the wires in your home renovated and now you want to use them and press the switch. As shown below

Enable server configuration

Server environment

About the server , the official website also explains it in detail.

https://mp.weixin.qq.com/wiki

We can also download the official demo to simulate.

Official sample

The code is also very simple. Basically, anyone who has learned the basic syntax of PHP can understand it.

<?php
/**
 * 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)){
 /* 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, &#39;SimpleXMLElement&#39;, 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";
  $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()
 {
 // you must define TOKEN by yourself
 if (!defined("TOKEN")) {
 throw new Exception(&#39;TOKEN is not defined!&#39;);
 }
 $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;
 }
 }
}
?>

The core idea is nothing more than checking the signature, processing the request, and feeding back the results.

What I have to say here is that I think Tencent can actually remove those templates and directly expose the black box mode. In this case, the security will be higher. In many cases, the more open the permissions are, the worse the effect may be.

Core Class

The next step is my own processing logic, refer to the official documentation. WeChat Public has 6 receiving interfaces and three replying interfaces. It can be determined based on MsgType.

Interface details

Verification

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;
 }
 }

The core of the verification method is It works based on the TOKEN we set on the previous web page, so it will be used in the code.

Reply

The reply code needs to be treated differently according to the type of data sent by the client. The WeChat platform will package the data based on the type. To encapsulate it, we just need to call the internal MsgType for processing.

Expansion

The expansion part was added based on my own whims.

Add a robot

Call a robot interface to send replies on your behalf. This skill allows users to have a good user experience and please the public. Why not for?

I tested two interfaces here, one is curl mode and the other is file_get_contents mode, both of them are very easy to use.

<?php
/**
 * 图灵 机器人接口
 * 
 * 使用curl来进行浏览器模拟并抓取数据
 */
function turing($requestStr) {
 // 图灵机器人接口
 $url = "http://www.tuling123.com/openapi/api";
 // 用于POST请求的数据
 $data = array(
 &#39;key&#39;=>"哈哈，这个key还是得你自己去申请的啦",
 &#39;info&#39;=>$requestStr,
 );
 // 构造curl下载器
 $ch = curl_init();
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($ch, CURLOPT_POST, 1);
 curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
 $responseStr = curl_exec($ch);
 curl_close($ch);
 return $responseStr;
}
/**
 * 调用另外的接口
 * @param unknown $req
 * @return mixed
 */
function test($req){
 $url = "http://api.qingyunke.com/api.php?key=free&appid=0&msg=".$req;
 $result = file_get_contents($url);
 $result = json_decode($result, true);
 return $result[&#39;content&#39;];
}
$req = &#39;hello&#39;;
$res = test($req);
echo $res;

Relevant explanation of WeChat remote control server for PHP development模式

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我平时喜欢使用Python写一些脚本，什么获取本地IP，聊天，查看内存，网速啥的，可谓是应有尽有。这下也终于能有用武之地了。利用微信的关键字匹配，就可以简单的让微信公众号当一个小小传话员啦。

这里给个思路，具体实现起来也比较简单，当做是文本来处理即可。

完整代码

下面贴出我服务器上的完整代码，有些私密的地方我做了些更改，届时按照自己的情况进行修改即可。

valid();
// 调用回复信息方法
$wechatObj->responseMsg ();
// 微信消息处理核心类
class wechatCallbackapiTest {
 public function valid() {
 $echoStr = $_GET ["echostr"];
 // valid signature , option
 if ($this->checkSignature ()) {
 echo $echoStr;
 exit ();
 } else {
 echo "验证失败！";
 }
 }
 public function responseMsg() {
 // get post data, May be due to the different environments
 // 类似$_POST但是可以接受XML数据，属于增强型
 $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
 */
 // 不解析外部数据，防止xxml漏洞
 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 ();
 /*
 * 微信客户端发送信息的时候会附带一些参数，详见官方文档。所以要根据不同的类型，来分别做相关的处理。
 * 于是MsgType 就充当这样的一个区分的标记
 */
 $msgType = $postObj->MsgType;
 /*
 * 当有用户关注后者退订的时候，会触发相应的事件。所以再来个event事件的监听更为友好。
 * $event = $postObj->Event.
 * 具体的参数信息，官网上很详细。
 */
 $event = $postObj->Event;
 switch ($msgType) {
 // 文本消息 处理部分
 case "text" :
  if (! empty ( $keyword )) {
  // 在此处进行对关键字的匹配就可以实现：针对不同关键字组装的相应数据
  if($keyword=='Relevant explanation of WeChat remote control server for PHP development' || $keyword == "music") {
  $msgType = 'music';
  $musictitle = "The Mountain";
  $musicdescription = "夏日舒心清凉歌曲";
  $musicurl = "http://101.200.58.242/wx/themaintain.mp3";
  $hqmusicurl = "http://101.200.58.242/wx/themaintain.mp3";
  musicMessageHandle($fromUsername, $toUsername, $time, $msgType, $musictitle, $musicdescription, $musicurl, $hqmusicurl);
  }elseif($keyword == '1'){
  $msgType = 'text';
  $contentStr = "人生得意须尽欢，莫使金樽空对月！";
  textMessageHandle($fromUsername, $toUsername, $time, $msgType, $contentStr);
  }elseif($keyword == 'Relevant explanation of WeChat remote control server for PHP development模式'){
  $msgType = 'text';
  $contentStr = "进入Relevant explanation of WeChat remote control server for PHP development模式，开始对服务器进行管理！\n接下来将依据您输入的Relevant explanation of WeChat remote control server for PHP development对服务器进行管理！";
  textMessageHandle($fromUsername, $toUsername, $time, $msgType, $contentStr);
  }else {
  // 直接调用 机器人接口，与用户进行交流
  $msgType = "text";
  $contentStr = turing($keyword)!=""?turing($keyword):"这里是微信 纯文本测试数据！";
  textMessageHandle ( $fromUsername, $toUsername, $time, $msgType, $contentStr );
  }
  } else {
  echo "您得输入点数据，我才能回复不是！";
  }
  break;
 // 接收图片信息
 case "image" :
  if (! empty ( $keyword )) {
//  $msgType = "image";
  $contentStr = "您发送的图片看起来还真不错！";
  textMessageHandle ( $fromUsername, $toUsername, $time, $msgType, $contentStr );
  } else {
  echo "服务器没能收到您发送的图片！";
  }
  break;
 // 接收语音信息
 case "voice" :
  if (! empty ( $keyword )) {
//  $msgType = "voice";
  $contentStr = "您发送的语音听起来还真不错！";
  textMessageHandle ( $fromUsername, $toUsername, $time, $msgType, $contentStr );
  } else {
  echo "服务器没能收到您发送的语音！";
  }
  break;
 // 接收视频信息
 case "video" :
  if (! empty ( $keyword )) {
//  $msgType = "video";
  $contentStr = "您发送的视频看起来还真不错！";
  textMessageHandle ( $fromUsername, $toUsername, $time, $msgType, $contentStr );
  } else {
  echo "服务器没能收到您发送的视频！";
  }
  break;
 // 接收视频信息
 case "shortvideo" :
  if (! empty ( $keyword )) {
//  $msgType = "shortvideo";
  $contentStr = "您发送的小视频看起来还真不错！";
  textMessageHandle ( $fromUsername, $toUsername, $time, $msgType, $contentStr );
  } else {
  echo "服务器没能收到您发送的小视频！";
  }
  break;
 // 接收位置信息
 case "location" :
  if (! empty ( $keyword )) {
//  $msgType = "location";
  $contentStr = "您发送的位置已被接收！";
  textMessageHandle ( $fromUsername, $toUsername, $time, $msgType, $contentStr );
  } else {
  echo "服务器没能收到您发送的位置！";
  }
  break;
 // 接收视频信息
 case "link" :
  if (! empty ( $keyword )) {
//  $msgType = "link";
  $contentStr = "您发送的链接看起来还真不错！";
  textMessageHandle ( $fromUsername, $toUsername, $time, $msgType, $contentStr );
  } else {
  echo "服务器没能收到您发送的链接！";
  }
  break;
 // 对事件进行侦听
 case "event":
  switch ($event) {
  case "subscribe":
  // 发送一些消息！
  $msgType = 'text';
  $contentStr = "终于等到你！";
  textMessageHandle($fromUsername, $toUsername, $time, $msgType, $contentStr);
  break;
  }
  break;
 default :
  break;
 }
 } 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 == $signature) {
 return true;
 } else {
 return false;
 }
 }
}
/**
 * 定义为心中想难关的六个接口的数据发送格式模板
 */
function textMessageHandle($fromUsername, $toUsername, $time, $msgType, $contentStr) {
 $textTpl = "
  
  
  %s
  
  
  0
 ";
 $resultStr = sprintf ( $textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr );
 echo $resultStr;
}
function imageMessageHandle($fromUsername, $toUsername, $time, $msgType, $contentStr) {
 $imageTpl = "
  
  
  %s
  
  
  
  
  1234567890123456
  ";
 $resultStr = sprintf ( $textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr );
 echo $resultStr;
}
function musicMessageHandle($fromUsername, $toUsername, $time, $msgType, $musictitle, $musicDescription, $musicurl, $hqmusicurl) {
 $musicTpl = "
  
  
  %s
  
  
  
  
  
  
  
 ";
 $resultStr = sprintf($musicTpl, $fromUsername, $toUsername, $time, $msgType, $musictitle, $musicDescription, $musicurl, $hqmusicurl);
 echo $resultStr;
}
/**
 * 图灵 机器人接口
 * 
 * 使用curl来进行浏览器模拟并抓取数据
 */
function turing($requestStr) {
 /* // 图灵机器人接口
 $url = "http://www.tuling123.com/openapi/api";
 // 用于POST请求的数据
 $data = array(
 "key"=>"您在图灵机器人官网上申请的key",
 "info"=>$requestStr
 );
 // 构造curl下载器
 $ch = curl_init();
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($ch, CURLOPT_POST, 1);
 curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
 $requestStr = curl_exec($ch);
 curl_close($ch);
 return responseStr; */
 $url = "http://api.qingyunke.com/api.php?key=free&appid=0&msg=".$requestStr;
 $result = file_get_contents($url);
 $result = json_decode($result, true);
 return $result['content'];
}
?>

总结

最后来回顾一下，本次试验用到了哪些知识点。

• PHP的面向对象方法编程简单实现。

• 接口处理的两种方式

• 微信公众号后台私服的接入，处理，反馈。

• 前后端的交互，以及聊天机器人的应用。

其实，这些代码跟我一开始的设想还是差别挺大的，原本是想实现一个“遥控器”，晚上想睡觉之前，用微信发一条Relevant explanation of WeChat remote control server for PHP development“打开电热毯”，半个小时后，电视看完了，去睡觉的时候发现被窝很暖和，是的，只要加上点硬件，这很容易实现啦再者冰箱了，电视了统统可以完成，那样估计就诊的是“智能家居”了吧。

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