timezone_name_from_abbr()

(PHP 5 >= 5.1.3, PHP 7)

Returns the timezone name from abbreviation

说明

参数

Time zone abbreviation.

Offset 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.

Daylight 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:

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