<?php

    define("appid", "你的appid");

    define("appsecret", "你的appsecret");

    //获取access_token，每7000s重新获取

    function getAccessToken() {

        $tokenFile = "./access_token.txt";

        $data = json_decode(file_get_contents($tokenFile));

        if ($data->expire_time < time() || !$data->expire_time) {

            $appid = appid;

            $appsecret = appsecret;

            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&secret=$appsecret";

            $res = json_decode(file_get_contents($url));

            $access_token = $res->access_token;

            if($access_token) {

                $data_new['expire_time'] = time() + 7000;

                $data_new['access_token'] = $access_token;

                file_put_contents($tokenFile, json_encode($data_new));

            }

        }else{

            $access_token = $data->access_token;

        }

        return $access_token;

    }

    // var_dump(getAccessToken());

?>