<?php declare(strict_types = 1); /* ** Zabbix ** Copyright (C) 2001-2022 Zabbix SIA ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU General Public License as published by ** the Free Software Foundation; either version 2 of the License, or ** (at your option) any later version. ** ** This program is distributed in the hope that it will be useful, ** but WITHOUT ANY WARRANTY; without even the implied warranty of ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** GNU General Public License for more details. ** ** You should have received a copy of the GNU General Public License ** along with this program; if not, write to the Free Software ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. **/ class CTimezoneHelper { /** * Get list of supported timezones. * Example: ["Europe/London" => "(UTC+00:00) Europe/London", ...] * * @return array */ public static function getList(): array { static $timezones; if ($timezones === null) { $timezones = []; foreach (DateTimeZone::listIdentifiers() as $timezone) { $offset = (new DateTimeZone($timezone))->getOffset(new DateTime()); $timezones[$timezone] = [ 'offset' => $offset, 'timezone' => $timezone, 'title' => '(UTC'.($offset < 0 ? '-' : '+').gmdate('H:i', abs($offset)).') '.$timezone ]; } CArrayHelper::sort($timezones, ['offset', 'timezone']); $timezones = array_column($timezones, 'title', 'timezone'); } return $timezones; } /** * Get timezone title, optionally prefixed. * * @param string $timezone * @param string|null $prefix * * @return string */ public static function getTitle(string $timezone, string $prefix = null): string { $timezone_title = self::getList()[$timezone]; if ($prefix === null) { return $timezone_title; } return $prefix.': '.$timezone_title; } /** * Is timezone supported? * * @param string $timezone * * @return bool */ public static function isSupported(?string $timezone): bool { return $timezone === null ? array_key_exists(ZBX_DEFAULT_TIMEZONE, self::getList()) : array_key_exists($timezone, self::getList()); } /** * Get system timezone. * Example: "Europe/London" * * @return string */ public static function getSystemTimezone(): string { $system_timezone_lower = strtolower(ini_get('date.timezone')); foreach (array_keys(self::getList()) as $timezone) { if ($system_timezone_lower === strtolower($timezone)) { return $timezone; } } return 'UTC'; } }