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(PHP 5 >= 5.2.0, PHP 7)
DateTime::getOffset -- DateTimeImmutable::getOffset -- DateTimeInterface::getOffset -- date_offset_get — Returns the timezone offset
面向对象风格
过程化风格
$object
)Returns the timezone offset.
object
仅为过程化风格:由 date_create() 返回的 DateTime 类型的对象。
Returns the timezone offset in seconds from UTC on success
或者在失败时返回 FALSE
.
Example #1 DateTime::getOffset() example
面向对象风格
<?php
$winter = new DateTime ( '2010-12-21' , new DateTimeZone ( 'America/New_York' ));
$summer = new DateTime ( '2008-06-21' , new DateTimeZone ( 'America/New_York' ));
echo $winter -> getOffset () . "\n" ;
echo $summer -> getOffset () . "\n" ;
?>
过程化风格
<?php
$winter = date_create ( '2010-12-21' , timezone_open ( 'America/New_York' ));
$summer = date_create ( '2008-06-21' , timezone_open ( 'America/New_York' ));
echo date_offset_get ( $winter ) . "\n" ;
echo date_offset_get ( $summer ) . "\n" ;
?>
以上例程会输出:
-18000 -14400
Note: -18000 = -5 hours, -14400 = -4 hours.
[#1] s7sunder at gmail dot com [2014-01-09 10:47:16]
This will be useful for converting offset values into GMT format
<?php
//target time zone
$target_time_zone = new DateTimeZone('America/Los_Angeles');
//find kolkata time
$kolkata_date_time = new DateTime('now', $target_time_zone);
//get the exact GMT format
echo 'GMT '.$kolkata_date_time->format('P');