Same name and namespace in other branches

1. 11.x core/lib/Drupal/Core/Datetime/TimeZoneFormHelper.php \Drupal\Core\Datetime\TimeZoneFormHelper::getOptionsListByRegion()

Generate an array of time zones names grouped by region.

This method retrieves the list of IANA time zones names that PHP is configured to use, for display to users. It does not return the backward compatible names (i.e., the ones defined in the back-zone file).

Parameters

bool $blank: (optional) If TRUE, prepend an empty time zone option to the array.

Return value

array An nested array containing time zones, keyed by the system name. The keys are valid time zone identifiers provided by \DateTimeZone::listIdentifiers()

9 calls to TimeZoneFormHelper::getOptionsListByRegion()

AccountForm::form in core/modules/user/src/AccountForm.php

Date::buildOptionsForm in core/modules/views/src/Plugin/views/field/Date.php

DateTimeFormatterBase::settingsForm in core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeFormatterBase.php

RegionalForm::buildForm in core/modules/system/src/Form/RegionalForm.php

SiteConfigureForm::buildForm in core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php

... See full list

File

core/lib/Drupal/Core/Datetime/TimeZoneFormHelper.php, line 53

Class

TimeZoneFormHelper

Helper class for dealing with timezones.

Namespace

Drupal\Core\Datetime

Code

public static function getOptionsListByRegion(bool $blank = FALSE) : array {
    $zones = static::getOptionsList($blank);
    $grouped_zones = [];
    foreach ($zones as $key => $value) {
        $split = explode('/', $value);
        $city = array_pop($split);
        $region = array_shift($split);
        if (!empty($region)) {
            $grouped_zones[$region][$key] = empty($split) ? $city : $city . ' (' . implode('/', $split) . ')';
        }
        else {
            $grouped_zones[$key] = $value;
        }
    }
    foreach ($grouped_zones as $key => $value) {
        if (is_array($grouped_zones[$key])) {
            asort($grouped_zones[$key]);
        }
    }
    return $grouped_zones;
}

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