Returns a timezone name by guessing from abbreviation and UTC offset

# timezone_name_from_abbr

(PHP 5 >= 5.1.3, PHP 7, PHP 8)

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

### Description

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

### Parameters

`abbr`

  Time 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`.

### Return Values

Returns time zone name on success or `false` on failure.

### Examples

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

### See Also

- timezone_abbreviations_list() - Alias of DateTimeZone::listAbbreviations

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