messageApplet/serviceApi/application/index/controller/AccessToken.php

<?php
/**
 * Created by PhpStorm.
 * User: Titan 名字就是密码
 * Date: 2019/12/12
 * Time: 12:18
 */

namespace app\index\controller;


use think\Controller;
use think\Request;

class AccessToken extends Controller
{
    public $appId = "wx3636f10fcd0790ff";
    public $appSecret = "550375e8a99321ab8be36c2978bc9dea";
    public function getAccessToken()
    {

        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$this->appId}&secret={$this->appSecret}";
        $token = cache("token");
        if(!$token){
            $data = $this->curl_get($url);
            $token = $data->access_token;
            cache("token",$token,7000);
            return $token;
        }else{
            return $token;
        }

    }

    public function getOpenid($code)
    {

        $url = "https://api.weixin.qq.com/sns/jscode2session?appid=$this->appId&secret=$this->appSecret&js_code=$code&grant_type=authorization_code";
        $result = $this->curl_get($url);
        return $result->openid;
    }

    public function curl_get($url)
    {
        $ch = curl_init();//初始化curl
        curl_setopt($ch, CURLOPT_URL,$url); //要访问的地址
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);//跳过证书验证
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);  // 从证书中检查SSL加密算法是否存在
        $data = json_decode(curl_exec($ch));
        if(curl_errno($ch)){
            var_dump(curl_error($ch)); //若错误打印错误信息
        }

        curl_close($ch);//关闭curl
        return $data;
    }
}