小程序消息推送配置的相关案例分析及实践

<?php

define("TOKEN","100txy");// 后台填写的token

$wechatObj = new wechatAPI();

$wechatObj->isValid();

class wechatAPI

{

  public function isValid()//验证微信接口，如果确认是微信就返回它传来的echostr参数

  {

     $echoStr = $_GET["echostr"];

     if ($this->checkSignature()) {

     echo $echoStr;

     exit;

     }

  }

  private function checkSignature(){ //官方的验证函数

   $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;

   }

  }

};