微信公众号token验证

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019\3\24 0024
 * Time: 15:13
 */
namespace app\index\controller;

use think\Controller;

class Token extends Controller{
    /**
     * 服务器token校验
     */
    public function token()
    {
        //获得参数 signature nonce token timestamp echostr
        $nonce     = input('get.nonce');
        $token     = 'shenlin';
        $timestamp = input('get.timestamp');
        $echostr   = input('get.echostr');
        $signature = input('get.signature');
        //形成数组，然后按字典序排序
        $array = [$nonce, $timestamp, $token];
        sort($array);
        //拼接成字符串,sha1加密 ，然后与signature进行校验
        $str = sha1(implode($array));
        if($str == $signature && $echostr) {
            //第一次接入weixin api接口的时候
            echo $echostr;
            exit;
        }
    }
}