(PHP 5 >= 5.1.3, PHP 7, PHP 8)
timezone_name_from_abbr — Returns a timezone name by guessing from abbreviation and UTC offset
$abbr, int $utcOffset = -1, int $isDST = -1): string|false
abbrTime zone abbreviation.
utcOffset
Offset 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.
isDST
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
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 utcOffset and
isDST.
Returns time zone name on success or false on failure.
Example #1 A timezone_name_from_abbr() example
<?php
echo timezone_name_from_abbr("CET") . "\n";
echo timezone_name_from_abbr("", 3600, 0) . "\n";
?>
The above example will output something similar to:
Europe/Berlin Europe/Paris