DateTimeImmutable::modify
(PHP 5 >= 5.5.0, PHP 7, PHP 8)
DateTimeImmutable::modify — Creates a new object with modified timestamp
說明
Creates a new DateTimeImmutable object with modified timestamp. The original object is not modified.
參數
-
object -
僅過程化風格：由 date_create() 返回的 DateTime 型別的對象。此函式會修改這個對象。
-
modifier -
日期/時間字串。正確格式的說明詳見 日期與時間格式。
返回值
Returns a new modified DateTimeImmutable object 或者在失敗時返回 false.
範例
示例 #1 DateTimeImmutable::modify() example
物件導向風格
<?php
$date = new DateTimeImmutable('2006-12-12');
$newDate = $date->modify('+1 day');
echo $newDate->format('Y-m-d');
?>
以上例程會輸出：
2006-12-13
示例 #2 Beware when adding or subtracting months
<?php
$date = new DateTimeImmutable('2000-12-31');
$newDate1 = $date->modify('+1 month');
echo $newDate1->format('Y-m-d') . "\n";
$newDate2 = $newDate1->modify('+1 month');
echo $newDate2->format('Y-m-d') . "\n";
?>
以上例程會輸出：
2001-01-31 2001-03-03
參見
- DateTimeImmutable::add() - Returns a new object, with added amount of days, months, years, hours, minutes and seconds
- DateTimeImmutable::sub() - Subtracts an amount of days, months, years, hours, minutes and seconds
- DateTimeImmutable::setDate() - Sets the date
- DateTimeImmutable::setISODate() - Sets the ISO date
- DateTimeImmutable::setTime() - Sets the time
- DateTimeImmutable::setTimestamp() - Sets the date and time based on a Unix timestamp