时间处理
最后更新于：2022-04-02 04:33:04
## 时间处理
```php
$d1 = '2020-04-28';
$d2 = '2020-06-28';
// echo date('Y-m-t', strtotime("+30 days", strtotime($d1)));exit;
// echo date('Y-m-t', strtotime("+1 month", strtotime($d1)));exit;
// echo date('Y-m-t', strtotime("+3 days", strtotime($d1)));exit;
// +1 days 此时慎用 strtotime modify 处理时间，遇跨月时处理不符合常规直观。DateTime 是符合直观的。感觉 strtotime 存在bug
$d = new DateTime($d1);
$d->modify('+30 days');
echo $d->format('Y-m-d');
exit;
```
### 参考
https://www.laruence.com/2018/07/31/3207.html
[https://www.php.net/manual/en/function.strtotime.php](https://www.php.net/manual/en/function.strtotime.php)
[https://derickrethans.nl/obtaining-the-next-month-in-php.html](https://derickrethans.nl/obtaining-the-next-month-in-php.html)
';