利用微信公众号做网课答案查询-后端php_王一之题库

利用微信公众号做网课答案查询-后端php-2020-4-17
题库api需要自己去找，或是自己做，数据庞大

一、准备

1.公众号

（不讲)

2.服务器

（不讲,我博客里有教)

3.Php

（不讲,我博客里有教在服务器上安装)

4.题库api接口

(自己做或是用别人的) api不提供自己找，因为过段时间就会失效

二、操作

1.新建一个php

cha.php //第一次先校验token，让微信公众号接口验证成功

<?php
                                           //token是微信公众号接口校验用的，第一次需要
define("TOKEN", "weixin");                  //根据自己的token改，我以weixin为例
$wechatObj = new wechatCallbackapiTest();
$wechatObj->valid();                      //接口验证         第一次启用，验证完，注释       
//$wechatObj->responseMsg();              //调用回复消息方法  先注释      
class wechatCallbackapiTest
{
 public function valid()                //校验token的方法
 {
 $echoStr = $_GET["echostr"];
 //valid signature , option
 if($this->checkSignature()){
 echo $echoStr;
 exit;
 }
 }

 public function responseMsg()           //回复消息用的
 {
 //get post data, May be due to the different environments
 $postStr = file_get_contents('php://input');

 //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 ))
 {
  $data = array(
    'q' => $keyword,
    
);
  $ch = curl_init();
  $params[CURLOPT_URL] = "*****";    //请求url地址，******里面填api题库接口
  $params[CURLOPT_HEADER] = FALSE; //是否返回响应头信息
  $params[CURLOPT_SSL_VERIFYPEER] = false;
  $params[CURLOPT_SSL_VERIFYHOST] = false;
  $params[CURLOPT_RETURNTRANSFER] = true; //是否将结果返回
  $params[CURLOPT_POST] = true;
  $params[CURLOPT_POSTFIELDS] = $data;
  curl_setopt_array($ch, $params); //传入curl参数
  $content = curl_exec($ch); //执行
  curl_close($ch); //关闭连接
  //return $content;


 
$json1=json_decode($content);
 
$code=json_encode($json1,JSON_UNESCAPED_UNICODE);
$data=strtr($code, array("success"=>"成功获取"));//这里是过滤返回的json用的根据实际api修改
$msgType = "text";
  $contentStr = $data;
  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
  echo $resultStr;
 }else{
  echo "Input something...";
 }

 }else {
 echo "";
 exit;
 }
 }
 
 private function checkSignature()               //校验token的
 {
 // 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;
 }
 }
}

?>

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复制即可不用修改，//因为是校验而已
我的话是将cha.php放在网站入口处

2.微信公众号修改配置

开发->基本配置->服务器配置->修改配置
URL是php文件所在地方
//比如我是，域名+cha.php，因为我是反正网站入口处
Token是校验码,
//我已weixin为例
EncodingAESKey 点击随机生成就好
选择明文模式
提交
显示token校验成功，就好//如果不是检查一下

3.修改cha.php

刚才这是校验成功，现在修改让它具有查题功能
如果接口需要请求是post请求

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

//define your token
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();//接口验证
$wechatObj->responseMsg();//调用回复消息方法
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 = file_get_contents('php://input');

 //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 ))
 {
  $data = array(
    'q' => $keyword,
    
);
  $ch = curl_init();
  $params[CURLOPT_URL] = "这里放题库api";    //请求url地址
  $params[CURLOPT_HEADER] = FALSE; //是否返回响应头信息
  $params[CURLOPT_SSL_VERIFYPEER] = false;
  $params[CURLOPT_SSL_VERIFYHOST] = false;
  $params[CURLOPT_RETURNTRANSFER] = true; //是否将结果返回
  $params[CURLOPT_POST] = true;
  $params[CURLOPT_POSTFIELDS] = $data;
  curl_setopt_array($ch, $params); //传入curl参数
  $content = curl_exec($ch); //执行
  curl_close($ch); //关闭连接
  //return $content;


 
$json1=json_decode($content);
 
$code=json_encode($json1,JSON_UNESCAPED_UNICODE);
$data=strtr($code, array("success"=>"成功获取"));//过滤返回json自己修改
$msgType = "text";
  $contentStr = $data;
  $resultStr = sprintf($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;
 }
 }
}

?>

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需要修改两处，一个是题库api，一个是返回json过滤，上面有标记自己看
然后保存即可，已经具备网课答案查询自动回复
如果接口需要请求是get请求

```bash
<?php
/**
 * wechat php test
 */

//define your token
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();//接口验证
$wechatObj->responseMsg();//调用回复消息方法
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 = file_get_contents('php://input');

 //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 ))
 {
  $data = array(
    'q' => $keyword,
    
);

$url='http://api.sklaolu.cn:1234/2.php?q='.$keyword;
$content = file_get_contents($url);



$msgType = "text";
  $contentStr = $content;
  $resultStr = sprintf($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;
 }
 }
}

?>

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# 三、效果
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200417123220861.PNG?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTA5NjU2OQ==,size_16,color_FFFFFF,t_70)
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