screen/application/common/model/QiyuToken.php

<?php

namespace app\common\model;

use Carbon\Carbon;
use think\Model;

/**
 * 短信验证码
 */
class QiyuToken Extends Model
{
    public static function clear(){
        return self::where('expire','<',time())->delete();
    }
    public static function getToken(){
        self::clear();
        return self::create([
            'token'=>session_create_id(),
            'expire'=>Carbon::now()->addSeconds(7210)->timestamp,
        ])['token'];
    }
    public static function exists($token){
        if(!$token){
            return false;
        }
        $has=self::where('token',$token)->where('expire','>',Carbon::now()->timestamp)->value('id');
        return $has>0;
    }
}