<"https://api.weixin.qq.com/cgi-bin/token";
    $result = https_request($url);
    $jsoninfo = json_decode($result, true);
    $access_token = $jsoninfo['access_token'];
    if ($access_token) 
    {
      $expire = time() + 7000;
      $mem = new CacheMemcache();
      $mem->set('access_token_'.$appid,$access_token,$expire);
    }
  }
  else 
  {
    $access_token = $acc;
  }
  return $access_token;
}
"htmlcode">

 function getAccessToken() {
  // access_token 应该全局存储与更新，以下代码以写入到文件中做示例
  $data = json_decode(file_get_contents("access_token.json"));
  if ($data->expire_time < time()) {
   $url = "https://api.weixin.qq.com/cgi-bin/token";
   $res = json_decode($this->httpGet($url));
   $access_token = $res->access_token;
   if ($access_token) {
    $data->expire_time = time() + 7000;
    $data->access_token = $access_token;
    $fp = fopen("access_token.json", "w");
    fwrite($fp, json_encode($data));
    fclose($fp);
   }
  } else {
   $access_token = $data->access_token;
  }
  return $access_token;
 }





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