This article mainly introduces the fourth article of PHP WeChat public platform development, WeChat reply function development, which has certain reference value. Interested friends can refer to it

1. Introduction

The WeChat public platform can make judgments based on the information sent by users, and then give corresponding replies, which has good interactivity. The following will simulate a simple reply function. Based on this case, developers can also basically understand the principles of WeChat interaction and conduct deeper development.

2. Idea analysis

We can extract keywords from the text messages sent by users, and use simple if...elseif...else... accomplish.

The key code is as follows:

if($keyword=="你好"){
　　$contentStr = "hello";
}elseif($keyword=="蘇州"){
　　$contentStr = "上有天堂，下有蘇杭";
}else{
　　$contentStr = "感謝您關(guān)注【卓錦蘇州】 微信號：zhuojinsz";
}

If the user sends "Hello", then reply "hello", if the user sends "Suzhou", then reply " There is heaven above, Suzhou and Hangzhou below." For other information, I will reply with your welcome message.

3. Complete code

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

//define your token
define("TOKEN", "zhuojin");
$wechatObj = new wechatCallbackapiTest();
$wechatObj->responseMsg();
//$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)){
        
         $postObj = simplexml_load_string($postStr, &#39;SimpleXMLElement&#39;, LIBXML_NOCDATA);
        $RX_TYPE = trim($postObj->MsgType);

        switch($RX_TYPE)
        {
          case "text":
            $resultStr = $this->handleText($postObj);
            break;
          case "event":
            $resultStr = $this->handleEvent($postObj);
            break;
          default:
            $resultStr = "Unknow msg type: ".$RX_TYPE;
            break;
        }
        echo $resultStr;
    }else {
      echo "";
      exit;
    }
  }

  public function handleText($postObj)
  {
    $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=="你好"){
        $contentStr = "hello";
      }elseif($keyword=="蘇州"){
        $contentStr = "上有天堂，下有蘇杭";
      }else{
        $contentStr = "感謝您關(guān)注【卓錦蘇州】 微信號：zhuojinsz";
      }
      $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
      echo $resultStr;
    }else{
      echo "Input something...";
    }
  }

  public function handleEvent($object)
  {
    $contentStr = "";
    switch ($object->Event)
    {
      case "subscribe":
        $contentStr = "感謝您關(guān)注【卓錦蘇州】"."\n"."微信號：zhuojinsz"."\n"."卓越錦繡，名城蘇州，我們?yōu)槟峁┨K州本地生活指南，蘇州相關(guān)信息查詢，做最好的蘇州微信平臺。"."\n"."目前平臺功能如下："."\n"."【1】 查天氣，如輸入：蘇州天氣"."\n"."【2】 查公交，如輸入：蘇州公交178"."\n"."【3】 翻譯，如輸入：翻譯I love you"."\n"."【4】 蘇州信息查詢，如輸入：蘇州觀前街"."\n"."更多內(nèi)容，敬請期待...";
        break;
      default :
        $contentStr = "Unknow Event: ".$object->Event;
        break;
    }
    $resultStr = $this->responseText($object, $contentStr);
    return $resultStr;
  }
  
  public function responseText($object, $content, $flag=0)
  {
    $textTpl = "<xml>
          <ToUserName><![CDATA[%s]]></ToUserName>
          <FromUserName><![CDATA[%s]]></FromUserName>
          <CreateTime>%s</CreateTime>
          <MsgType><![CDATA[text]]></MsgType>
          <Content><![CDATA[%s]]></Content>
          <FuncFlag>%d</FuncFlag>
          </xml>";
    $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);
    return $resultStr;
  }


  private function checkSignature()
  {
    $signature = $_GET["signature"];
    $timestamp = $_GET["timestamp"];
    $nonce = $_GET["nonce"];  
        
    $token = TOKEN;
    $tmpArr = array($token, $timestamp, $nonce);
    sort($tmpArr);
    $tmpStr = implode( $tmpArr );
    $tmpStr = sha1( $tmpStr );
    
    if( $tmpStr == $signature ){
      return true;
    }else{
      return false;
    }
  }
}

?>

4. Test

##

The above is the detailed content of PHP WeChat public platform development reply function example code. For more information, please follow other related articles on the PHP Chinese website!