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(PHP 5 >= 5.2.0, PHP 7)
DateTime::setDate -- date_date_set — Sets the date
面向对象风格
$year
, int $month
, int $day
)过程化风格
$object
, int $year
, int $month
, int $day
)Resets the current date of the DateTime object to a different date.
object
仅过程化风格:由 date_create() 返回的 DateTime 类型的对象。此函数会修改这个对象。
year
Year of the date.
month
Month of the date.
day
Day of the date.
返回被修改的 DateTime 对象, 或者在失败时返回 FALSE
.
版本 | 说明 |
---|---|
5.3.0 | 将返回值从 NULL 改为 DateTime 类型。 |
Example #1 DateTime::setDate() example
面向对象风格
<?php
$date = new DateTime ();
$date -> setDate ( 2001 , 2 , 3 );
echo $date -> format ( 'Y-m-d' );
?>
过程化风格
<?php
$date = date_create ();
date_date_set ( $date , 2001 , 2 , 3 );
echo date_format ( $date , 'Y-m-d' );
?>
以上例程会输出:
2001-02-03
Example #2 Values exceeding ranges are added to their parent values
<?php
$date = new DateTime ();
$date -> setDate ( 2001 , 2 , 28 );
echo $date -> format ( 'Y-m-d' ) . "\n" ;
$date -> setDate ( 2001 , 2 , 29 );
echo $date -> format ( 'Y-m-d' ) . "\n" ;
$date -> setDate ( 2001 , 14 , 3 );
echo $date -> format ( 'Y-m-d' ) . "\n" ;
?>
以上例程会输出:
2001-02-28 2001-03-01 2002-02-03
[#1] remy215 at laposte dot net [2012-01-11 22:59:06]
Be warned, DateTime::setDate() does not check for invalid input.
Illustration:
<?php
$dt = new DateTime();
$dt->setDate(2012, 11, 31); // returns DateTime object and not false although this date does not exist
echo $dt->format('Y-m-d'); // output: 2012-12-01
?>
No error was generated on entering a non existing date, php silently changed it.