php 使用php从日期中减去天、月或年
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Subtracting days, months or years from date using php
提问by dimoss
I have a db table with a date field startBeforein ('Y-m-d')format. There are also 3 other int fields representing years, months and days. What I would like to do is to fill these three fields the new startAfterdate in 'Y-m-d'format.
我有一个日期字段一个数据库表startBefore中('Y-m-d')的格式。还有其他 3 个 int 字段代表年、月和日。我想做的是startAfter用'Y-m-d'格式填写新日期的这三个字段。
For example I have the '2001-11-14' as startBeforedate and I would like to subtract 3 yrs, 7 months, 1 day to get the startAfterdate.
例如，我将“2001-11-14”作为startBefore日期，我想减去 3 年、7 个月、1 天来获得startAfter日期。
Any ideas how I can accomplish this?
我有什么想法可以做到这一点吗？
Thanks!
谢谢！
回答by Nambi
use strtotime('date -years -months -days')
用 strtotime('date -years -months -days')
<?php
$time = strtotime('2001-11-14 -3 years -7 months -5 days');
echo $date = date("Y-m-d", $time);
回答by tomexsans
Here comes the DateTime:
来了DateTime：
$start_date = '2013-03-06';
$date = DateTime::createFromFormat('Y-m-d',$start_date);
$date->modify('+1 month');
echo $date->format('Y-m-d');//2013-04-06
$date->modify('+4 year');
echo $date->format('Y-m-d');//2017-04-06
$date->modify('+6 day');
echo $date->format('Y-m-d');//2017-04-12
$date->modify('+24 hours');
echo $date->format('Y-m-d');//2017-04-13
$date->modify('-7 years');
echo $date->format('Y-m-d'); //2010-04-13
$date->modify('-18 months');
echo $date->format('Y-m-d'); //2008-10-13
So on and so forth.
等等等等。
回答by Jenno Richi Benat
You Could try
你可以试试
strtotimefunction in php its quite simple
strtotimephp中的函数很简单
<?php
echo date("jS F, Y", strtotime("11.12.10"));
// outputs 10th December, 2011
echo date("jS F, Y", strtotime("11/12/10"));
// outputs 12th November, 2010
echo date("jS F, Y", strtotime("11-12-10"));
// outputs 11th December, 2010
?>
回答by Goikiu
One way is to make the startBefore date a timestamp, than working with numbers and re-obtain the startAfter date, another way is to try to subtract days, months and years directly from the date.
一种方法是使 startBefore 日期成为时间戳，而不是使用数字并重新获取 startAfter 日期，另一种方法是尝试直接从日期中减去天、月和年。
