timezone_name_from_abbr()

timezone_name_from_abbr() — Returns a timezone name by guessing from abbreviation and UTC offset.

Built-in function of PHP 8.5. The manual lists it as available in PHP 5 >= 5.1.3, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

Signature

timezone_name_from_abbr(string $abbr, int $utcOffset = -1, int $isDST = -1): string|false

Parameters

ParameterTypeWhat it takes
$abbrstringTime zone abbreviation.
$utcOffsetintOffset from GMT in seconds. Defaults to -1 which means that first found time zone corresponding to abbr is returned. Otherwise exact offset is searched and only if not found then the first time zone with any offset is returned.
$isDSTintDaylight 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 utcOffset is assumed to be an offset with daylight saving in effect; if 0, then utcOffset is assumed to be an offset without daylight saving in effect. If abbr doesn't exist then the time zone is searched solely by the ...

Return value

Returns time zone name on success or false on failure.

Example

A runnable snippet:

echo timezone_name_from_abbr("CET") . "\n"; echo timezone_name_from_abbr("", 3600, 0) . "\n";

Output:

Europe/Berlin Europe/Paris

See also

timezone_abbreviations_list()

All PHP 8.5 built-in functions

Reference card built from the PHP manual page timezone_name_from_abbr() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.