timezone_name_from_abbr() - php 日期时间函数
timezone_name_from_abbr()
(PHP 5 >= 5.1.3, PHP 7)
Returns the timezone name from abbreviation
说明
timezone_name_from_abbr(string $abbr[,int $gmtOffset=-1[,int $isdst=-1]]): string参数
$abbrTime zone abbreviation.
$gmtOffsetOffset from GMT in seconds. Defaults to -1 which means that first found time zone corresponding to$abbris returned. Otherwise exact offset is searched and only if not found then the first time zone with any offset is returned.
$isdstDaylight saving time indicator. Defaults to -1, which means that whether the time zone has daylight saving or not is not taken into consideration when searching. If this is set to 1, then the$gmtOffsetis assumed to be an offset with daylight saving in effect; if 0,then$gmtOffsetis assumed to be an offset without daylight saving in effect.If$abbrdoesn't exist then the time zone is searched solely by the$gmtOffsetand$isdst.
返回值
Returns time zone name on success 或者在失败时返回FALSE
.
范例
Atimezone_name_from_abbr()example
以上例程的输出类似于:
Europe/Berlin Europe/Paris
参见
timezone_abbreviations_list()
别名 DateTimeZone::listAbbreviations
timezone_name_from_abbr() sometimes returns FALSE instead of an actual timezone: http://bugs.php.net/44780 It's possible to workaround it for some cases by getting the timezone name from timezone_abbreviations_list(). For example, if you have the GMT offset and want a timezone name:
In some cases, timezone_name_from_abbr() may return a "historical" (i.e. deprecated) timezone identifier rather than the current standard one for a given location. For example: This means that the returned timezone identifier is not guaranteed to be in the results of timezone_identifiers_list() unless you include the "backwards compatible" timezones.
Another way to do this is to wrap the function in a class that extends the DateTimeZone class: