(PHP 5 >= 5.3.0, PHP 7)
DateTime::sub -- date_sub — 锟斤拷一锟斤拷 DateTime 锟斤拷锟斤拷锟饺ヒ伙拷锟斤拷锟斤拷锟� 锟秸★拷锟铰★拷锟疥、小时锟斤拷锟斤拷锟接猴拷锟诫。
object锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟� date_create() 锟斤拷锟截碉拷 DateTime 锟斤拷锟酵的讹拷锟襟。此猴拷锟斤拷锟斤拷锟睫革拷锟斤拷锟斤拷锟斤拷锟�
interval
DateInterval 锟斤拷锟斤拷
锟斤拷锟截憋拷锟睫改碉拷 DateTime 锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE.
Example #1 DateTime::sub() 锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷锟�
<?php
$date = new DateTime('2000-01-20');
$date->sub(new DateInterval('P10D'));
echo $date->format('Y-m-d') . "\n";
?>
锟斤拷锟教伙拷锟斤拷锟�
<?php
$date = date_create('2000-01-20');
date_sub($date, date_interval_create_from_date_string('10 days'));
echo date_format($date, 'Y-m-d');
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
2000-01-10
Example #2 Further DateTime::sub() 锟斤拷锟斤拷
<?php
$date = new DateTime('2000-01-20');
$date->sub(new DateInterval('PT10H30S'));
echo $date->format('Y-m-d H:i:s') . "\n";
$date = new DateTime('2000-01-20');
$date->sub(new DateInterval('P7Y5M4DT4H3M2S'));
echo $date->format('Y-m-d H:i:s') . "\n";
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
2000-01-19 13:59:30 1992-08-15 19:56:58
Example #3 锟斤拷去一锟斤拷锟斤拷锟斤拷锟铰份碉拷时锟斤拷锟斤拷要注锟斤拷
<?php
$date = new DateTime('2001-04-30');
$interval = new DateInterval('P1M');
$date->sub($interval);
echo $date->format('Y-m-d') . "\n";
$date->sub($interval);
echo $date->format('Y-m-d') . "\n";
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
2001-03-30 2001-03-02
锟斤拷 PHP 5.2 之锟襟，匡拷锟斤拷使锟斤拷 DateTime::modify() 锟斤拷为锟斤拷锟斤拷锟�