使用php開發微信公眾平台設定介面程式

<?php
 // //最简单的验证方式
 // echo $_GET["echostr"];

 //验证是否来自于微信
 function checkWeixin(){
  //微信会发送4个参数到我们的服务器后台 签名 时间戳 随机字符串 随机数

  $signature = $_GET["signature"];
  $timestamp = $_GET["timestamp"];
  $nonce = $_GET["nonce"];
  $echostr = $_GET["echostr"];
  $token = "qilipingmgl";

  // 1）将token、timestamp、nonce三个参数进行字典序排序
  $tmpArr = array($nonce,$token,$timestamp);
  sort($tmpArr,SORT_STRING);

  // 2）将三个参数字符串拼接成一个字符串进行sha1加密
  $str = implode($tmpArr);
  $sign = sha1($str);

  // 3）开发者获得加密后的字符串可与signature对比，标识该请求来源于微信
  if ($sign == $signature) {
   echo $echostr;
  }
 }
 checkWeixin();
?>

<?php
 class Weixin{
  private $appID = "wxe62f370c4e2cade2";
  private $appsecret = "58807091ae5a4c59ee3e47108184bdb7";

  function getAccessToken(){
   $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$this->appID}&secret={$this->appsecret}";

   // return $this->httpGet($url);
   //json字符串
   $json = $this->httpGet($url);
   //解析json
   $obj = json_decode($json);
   return $obj->access_token;
  }

  function httpGet($url){
   //1.初始化
   $curl = curl_init();
   //配置curl
   curl_setopt($curl, CURLOPT_URL, $url);
   curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
   //执行curl
   $res = curl_exec($curl);
   //关闭curl
   curl_close($curl);
   return $res;
  }
 }
 $wx = new Weixin();
 echo $wx->getAccessToken();

 /*
  获取access_token方法 get方法
 */
?>