<"填写上一次的token值"; //需要替换成自己的
    if(time() > ($this->last_time + 7200))
    {
      //GET请求的地址
      $url = "https://api.weixin.qq.com/cgi-bin/token";
      $access_token_Arr = $this->https_request($url);
      $this->last_time = time();
      return $access_token_Arr['access_token'];
    }
    return $access_token;
  }
  //https请求（支持GET和POST）
  public function https_request($url,$data = null)
  {
    $ch = curl_init();
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
    if(!empty($data))
    {
      curl_setopt($ch,CURLOPT_POST,1); //模拟POST
      curl_setopt($ch,CURLOPT_POSTFIELDS,$data); //POST内容
    }
    $outopt = curl_exec($ch);
    curl_close($ch);
    $outopt = json_decode($outopt,true);
    return $outopt;
  }
}