WechatCaptcha.php
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<?php
namespace addons\wechat\model;
use fast\Random;
use think\Model;
class WechatCaptcha extends Model
{
// 表名
protected $name = 'wechat_captcha';
// 自动写入时间戳字段
protected $autoWriteTimestamp = 'int';
// 定义时间戳字段名
protected $createTime = 'createtime';
protected $updateTime = '';
// 追加属性
protected $append = [
];
/**
* 发送验证码
* @param $openid string 用户OpenID
* @param $event string 事件
* @param $ip string IP地址
* @return string
*/
public static function send($openid, $event, $ip)
{
$captcha = self::where(['openid' => $openid, 'event' => $event])->whereTime('createtime', '-2 minutes')->find();
if ($captcha) {
return "验证码发送速度过快，请稍后重试";
}
$code = Random::alnum(4);
$data = [
'event' => $event,
'openid' => $openid,
'code' => $code,
'ip' => $ip,
];
self::create($data);
return "你的验证码是：{$code}，2分钟内输入有效";
}
/**
* 检测验证码
* @param $code string 验证码
* @param $event string 事件
* @param $ip string IP
* @return bool
*/
public static function check($code, $event, $ip = null)
{
$ip = is_null($ip) ? request()->ip() : $ip;
$captcha = self::where(['ip' => $ip, 'event' => $event])->whereTime('createtime', '-2 minutes')->find();
if ($captcha && $captcha->code == $code && $captcha->times < 10) {
$captcha->setInc("times");
return true;
}
//验证大于10次或超时
if ($captcha && ($captcha->times >= 10 || time() - $captcha->createtime > 120)) {
$captcha->delete();
}
return false;
}
}