<?php
/**
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| |
| Copyright (C) The Roundcube Dev Team |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| Class to read configuration settings |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
/**
* Configuration class for Roundcube
*
* @package Framework
* @subpackage Core
*/
class rcube_config
{
const DEFAULT_SKIN = 'elastic';
public $system_skin = 'elastic';
private $env = '';
private $paths = array();
private $prop = array();
private $errors = array();
private $userprefs = array();
private $immutable = array();
private $client_tz;
/**
* Renamed options
*
* @var array
*/
private $legacy_props = array(
// new name => old name
'mail_pagesize' => 'pagesize',
'addressbook_pagesize' => 'pagesize',
'reply_mode' => 'top_posting',
'refresh_interval' => 'keep_alive',
'min_refresh_interval' => 'min_keep_alive',
'messages_cache_ttl' => 'message_cache_lifetime',
'mail_read_time' => 'preview_pane_mark_read',
'session_debug' => 'log_session',
'redundant_attachments_cache_ttl' => 'redundant_attachments_memcache_ttl',
);
/**
* Object constructor
*
* @param string $env Environment suffix for config files to load
*/
public function __construct($env = '')
{
$this->env = $env;
if ($paths = getenv('RCUBE_CONFIG_PATH')) {
$this->paths = explode(PATH_SEPARATOR, $paths);
// make all paths absolute
foreach ($this->paths as $i => $path) {
if (!rcube_utils::is_absolute_path($path)) {
if ($realpath = realpath(RCUBE_INSTALL_PATH . $path)) {
$this->paths[$i] = unslashify($realpath) . '/';
}
else {
unset($this->paths[$i]);
}
}
else {
$this->paths[$i] = unslashify($path) . '/';
}
}
}
if (defined('RCUBE_CONFIG_DIR') && !in_array(RCUBE_CONFIG_DIR, $this->paths)) {
$this->paths[] = RCUBE_CONFIG_DIR;
}
if (empty($this->paths)) {
$this->paths[] = RCUBE_INSTALL_PATH . 'config/';
}
$this->load();
// Defaults, that we do not require you to configure,
// but contain information that is used in various locations in the code:
if (empty($this->prop['contactlist_fields'])) {
$this->set('contactlist_fields', array('name', 'firstname', 'surname', 'email'));
}
}
/**
* @brief Guess the type the string may fit into.
*
* Look inside the string to determine what type might be best as a container.
*
* @param mixed $value The value to inspect
*
* @return The guess at the type.
*/
private function guess_type($value)
{
$type = 'string';
// array requires hint to be passed.
if (preg_match('/^[-+]?(\d+(\.\d*)?|\.\d+)([eE][-+]?\d+)?$/', $value)) {
$type = 'double';
}
else if (preg_match('/^\d+$/', $value)) {
$type = 'integer';
}
else if (preg_match('/^(t(rue)?)|(f(alse)?)$/i', $value)) {
$type = 'boolean';
}
return $type;
}
/**
* @brief Parse environment variable into PHP type.
*
* Perform an appropriate parsing of the string to create the desired PHP type.
*
* @param string $string String to parse into PHP type
* @param string $type Type of value to return
*
* @return Appropriately typed interpretation of $string.
*/
private function parse_env($string, $type)
{
$_ = $string;
switch ($type) {
case 'boolean':
$_ = (boolean) $_;
break;
case 'integer':
$_ = (integer) $_;
break;
case 'double':
$_ = (double) $_;
break;
case 'string':
break;
case 'array':
$_ = json_decode($_, true);
break;
case 'object':
$_ = json_decode($_, false);
break;
case 'resource':
case 'NULL':
default:
$_ = $this->parse_env($_, $this->guess_type($_));
}
return $_;
}
/**
* @brief Get environment variable value.
*
* Retrieve an environment variable's value or if it's not found, return the
* provided default value.
*
* @param string $varname Environment variable name
* @param mixed $default_value Default value to return if necessary
* @param string $type Type of value to return
*
* @return Value of the environment variable or default if not found.
*/
private function getenv_default($varname, $default_value, $type = null)
{
$value = getenv($varname);
if ($value === false) {
$value = $default_value;
}
else {
$value = $this->parse_env($value, $type ?: gettype($default_value));
}
return $value;
}
/**
* Load config from local config file
*/
private function load()
{
// Load default settings
if (!$this->load_from_file('defaults.inc.php')) {
$this->errors[] = 'defaults.inc.php was not found.';
}
// load main config file
if (!$this->load_from_file('config.inc.php')) {
// Old configuration files
if (!$this->load_from_file('main.inc.php') || !$this->load_from_file('db.inc.php')) {
$this->errors[] = 'config.inc.php was not found.';
}
else if (rand(1,100) == 10) { // log warning on every 100th request (average)
trigger_error("config.inc.php was not found. Please migrate your config by running bin/update.sh", E_USER_WARNING);
}
}
// load host-specific configuration
$this->load_host_config();
// set skin (with fallback to old 'skin_path' property)
if (empty($this->prop['skin'])) {
if (!empty($this->prop['skin_path'])) {
$this->prop['skin'] = str_replace('skins/', '', unslashify($this->prop['skin_path']));
}
else {
$this->prop['skin'] = self::DEFAULT_SKIN;
}
}
if ($this->prop['skin'] == 'default') {
$this->prop['skin'] = self::DEFAULT_SKIN;
}
$this->system_skin = $this->prop['skin'];
// fix paths
foreach (array('log_dir' => 'logs', 'temp_dir' => 'temp') as $key => $dir) {
foreach (array($this->prop[$key], '../' . $this->prop[$key], RCUBE_INSTALL_PATH . $dir) as $path) {
if ($path && ($realpath = realpath(unslashify($path)))) {
$this->prop[$key] = $realpath;
break;
}
}
}
// fix default imap folders encoding
foreach (array('drafts_mbox', 'junk_mbox', 'sent_mbox', 'trash_mbox') as $folder) {
$this->prop[$folder] = rcube_charset::convert($this->prop[$folder], RCUBE_CHARSET, 'UTF7-IMAP');
}
// set PHP error logging according to config
$error_log = $this->prop['log_driver'] ?: 'file';
if ($error_log == 'file') {
$error_log = $this->prop['log_dir'] . '/errors';
$error_log .= isset($this->prop['log_file_ext']) ? $this->prop['log_file_ext'] : '.log';
}
if ($error_log && $error_log != 'stdout') {
ini_set('error_log', $error_log);
}
// remove deprecated properties
unset($this->prop['dst_active']);
}
/**
* Load a host-specific config file if configured
* This will merge the host specific configuration with the given one
*/
private function load_host_config()
{
if (empty($this->prop['include_host_config'])) {
return;
}
foreach (array('HTTP_HOST', 'SERVER_NAME', 'SERVER_ADDR') as $key) {
$fname = null;
$name = $_SERVER[$key];
if (!$name) {
continue;
}
if (is_array($this->prop['include_host_config'])) {
$fname = $this->prop['include_host_config'][$name];
}
else {
$fname = preg_replace('/[^a-z0-9\.\-_]/i', '', $name) . '.inc.php';
}
if ($fname && $this->load_from_file($fname)) {
return;
}
}
}
/**
* Read configuration from a file
* and merge with the already stored config values
*
* @param string $file Name of the config file to be loaded
*
* @return booelan True on success, false on failure
*/
public function load_from_file($file)
{
$success = false;
foreach ($this->resolve_paths($file) as $fpath) {
if ($fpath && is_file($fpath) && is_readable($fpath)) {
// use output buffering, we don't need any output here
ob_start();
include($fpath);
ob_end_clean();
if (is_array($config)) {
$this->merge($config);
$success = true;
}
// deprecated name of config variable
if (is_array($rcmail_config)) {
$this->merge($rcmail_config);
$success = true;
}
}
}
return $success;
}
/**
* Helper method to resolve absolute paths to the given config file.
* This also takes the 'env' property into account.
*
* @param string $file Filename or absolute file path
* @param boolean $use_env Return -$env file path if exists
*
* @return array List of candidates in config dir path(s)
*/
public function resolve_paths($file, $use_env = true)
{
$files = array();
$abs_path = rcube_utils::is_absolute_path($file);
foreach ($this->paths as $basepath) {
$realpath = $abs_path ? $file : realpath($basepath . '/' . $file);
// check if <file>-env.ini exists
if ($realpath && $use_env && !empty($this->env)) {
$envfile = preg_replace('/\.(inc.php)$/', '-' . $this->env . '.\\1', $realpath);
if (is_file($envfile)) {
$realpath = $envfile;
}
}
if ($realpath) {
$files[] = $realpath;
// no need to continue the loop if an absolute file path is given
if ($abs_path) {
break;
}
}
}
return $files;
}
/**
* Getter for a specific config parameter
*
* @param string $name Parameter name
* @param mixed $def Default value if not set
*
* @return mixed The requested config value
*/
public function get($name, $def = null)
{
if (isset($this->prop[$name])) {
$result = $this->prop[$name];
}
else {
$result = $def;
}
$result = $this->getenv_default('ROUNDCUBE_' . strtoupper($name), $result);
$rcube = rcube::get_instance();
if ($name == 'timezone') {
if (empty($result) || $result == 'auto') {
$result = $this->client_timezone();
}
}
else if ($name == 'client_mimetypes') {
if (!$result && !$def) {
$result = 'text/plain,text/html'
. ',image/jpeg,image/gif,image/png,image/bmp,image/tiff,image/webp'
. ',application/x-javascript,application/pdf,application/x-shockwave-flash';
}
if ($result && is_string($result)) {
$result = explode(',', $result);
}
}
$plugin = $rcube->plugins->exec_hook('config_get', array(
'name' => $name, 'default' => $def, 'result' => $result));
return $plugin['result'];
}
/**
* Setter for a config parameter
*
* @param string $name Parameter name
* @param mixed $value Parameter value
* @param bool $immutable Make the value immutable
*/
public function set($name, $value, $immutable = false)
{
$this->prop[$name] = $value;
if ($immutable) {
$this->immutable[$name] = $value;
}
}
/**
* Override config options with the given values (eg. user prefs)
*
* @param array $prefs Hash array with config props to merge over
*/
public function merge($prefs)
{
$prefs = $this->fix_legacy_props($prefs);
$this->prop = array_merge($this->prop, $prefs, $this->userprefs, $this->immutable);
}
/**
* Merge the given prefs over the current config
* and make sure that they survive further merging.
*
* @param array $prefs Hash array with user prefs
*/
public function set_user_prefs($prefs)
{
$prefs = $this->fix_legacy_props($prefs);
// Honor the dont_override setting for any existing user preferences
$dont_override = $this->get('dont_override');
if (is_array($dont_override) && !empty($dont_override)) {
foreach ($dont_override as $key) {
unset($prefs[$key]);
}
}
if ($prefs['skin'] == 'default') {
$prefs['skin'] = $this->system_skin;
}
$skins_allowed = $this->get('skins_allowed');
if (!empty($prefs['skin']) && !empty($skins_allowed) && !in_array($prefs['skin'], (array) $skins_allowed)) {
unset($prefs['skin']);
}
$this->userprefs = $prefs;
$this->prop = array_merge($this->prop, $prefs);
}
/**
* Getter for all config options
*
* @return array Hash array containing all config properties
*/
public function all()
{
$props = $this->prop;
foreach ($props as $prop_name => $prop_value) {
$props[$prop_name] = $this->getenv_default('ROUNDCUBE_' . strtoupper($prop_name), $prop_value);
}
$rcube = rcube::get_instance();
$plugin = $rcube->plugins->exec_hook('config_get', array(
'name' => '*', 'result' => $props));
return $plugin['result'];
}
/**
* Some options set as immutable that are also listed
* in dont_override should not be stored permanently
* in user preferences. Here's the list of these
*
* @return array List of transient options
*/
public function transient_options()
{
return array_intersect(array_keys($this->immutable), (array) $this->get('dont_override'));
}
/**
* Special getter for user's timezone offset including DST
*
* @return float Timezone offset (in hours)
* @deprecated
*/
public function get_timezone()
{
if ($tz = $this->get('timezone')) {
try {
$tz = new DateTimeZone($tz);
return $tz->getOffset(new DateTime('now')) / 3600;
}
catch (Exception $e) {
}
}
return 0;
}
/**
* Return requested DES crypto key.
*
* @param string $key Crypto key name
*
* @return string Crypto key
*/
public function get_crypto_key($key)
{
// Bomb out if the requested key does not exist
if (!array_key_exists($key, $this->prop) || empty($this->prop[$key])) {
rcube::raise_error(array(
'code' => 500, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Request for unconfigured crypto key \"$key\""
), true, true);
}
return $this->prop[$key];
}
/**
* Return configured crypto method.
*
* @return string Crypto method
*/
public function get_crypto_method()
{
return $this->get('cipher_method') ?: 'DES-EDE3-CBC';
}
/**
* Try to autodetect operating system and find the correct line endings
*
* @return string The appropriate mail header delimiter
* @deprecated Since 1.3 we don't use mail()
*/
public function header_delimiter()
{
// use the configured delimiter for headers
if (!empty($this->prop['mail_header_delimiter'])) {
$delim = $this->prop['mail_header_delimiter'];
if ($delim == "\n" || $delim == "\r\n") {
return $delim;
}
else {
rcube::raise_error(array(
'code' => 500, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Invalid mail_header_delimiter setting"
), true, false);
}
}
$php_os = strtolower(substr(PHP_OS, 0, 3));
if ($php_os == 'win')
return "\r\n";
if ($php_os == 'mac')
return "\r\n";
return "\n";
}
/**
* Returns list of configured PGP key servers
*
* @return array|null List of keyservers' URLs
*/
public function keyservers()
{
$list = (array) $this->prop['keyservers'];
foreach ($list as $idx => $host) {
if (!preg_match('|^[a-z]+://|', $host)) {
$host = "https://$host";
}
$list[$idx] = slashify($host);
}
return !empty($list) ? $list : null;
}
/**
* Return the mail domain configured for the given host
*
* @param string $host IMAP host
* @param boolean $encode If true, domain name will be converted to IDN ASCII
*
* @return string Resolved SMTP host
*/
public function mail_domain($host, $encode=true)
{
$domain = $host;
if (is_array($this->prop['mail_domain'])) {
if (isset($this->prop['mail_domain'][$host])) {
$domain = $this->prop['mail_domain'][$host];
}
}
else if (!empty($this->prop['mail_domain'])) {
$domain = rcube_utils::parse_host($this->prop['mail_domain']);
}
if ($encode) {
$domain = rcube_utils::idn_to_ascii($domain);
}
return $domain;
}
/**
* Getter for error state
*
* @return mixed Error message on error, False if no errors
*/
public function get_error()
{
return empty($this->errors) ? false : implode("\n", $this->errors);
}
/**
* Internal getter for client's (browser) timezone identifier
*/
private function client_timezone()
{
if ($this->client_tz) {
return $this->client_tz;
}
// @TODO: remove this legacy timezone handling in the future
$props = $this->fix_legacy_props(array('timezone' => $_SESSION['timezone']));
if (!empty($props['timezone'])) {
// Prevent from using deprecated timezone names
$props['timezone'] = $this->resolve_timezone_alias($props['timezone']);
try {
$tz = new DateTimeZone($props['timezone']);
return $this->client_tz = $tz->getName();
}
catch (Exception $e) { /* gracefully ignore */ }
}
// fallback to server's timezone
return date_default_timezone_get();
}
/**
* Convert legacy options into new ones
*
* @param array $props Hash array with config props
*
* @return array Converted config props
*/
private function fix_legacy_props($props)
{
foreach ($this->legacy_props as $new => $old) {
if (isset($props[$old])) {
if (!isset($props[$new])) {
$props[$new] = $props[$old];
}
unset($props[$old]);
}
}
// convert deprecated numeric timezone value
if (isset($props['timezone']) && is_numeric($props['timezone'])) {
if ($tz = self::timezone_name_from_abbr($props['timezone'])) {
$props['timezone'] = $tz;
}
else {
unset($props['timezone']);
}
}
// translate old `preview_pane` settings to `layout`
if (isset($props['preview_pane']) && !isset($props['layout'])) {
$props['layout'] = $props['preview_pane'] ? 'desktop' : 'list';
unset($props['preview_pane']);
}
// translate old `display_version` settings to `display_product_info`
if (isset($props['display_version']) && !isset($props['display_product_info'])) {
$props['display_product_info'] = $props['display_version'] ? 2 : 1;
unset($props['display_version']);
}
return $props;
}
/**
* timezone_name_from_abbr() replacement. Converts timezone offset
* into timezone name abbreviation.
*
* @param float $offset Timezone offset (in hours)
*
* @return string Timezone abbreviation
*/
static public function timezone_name_from_abbr($offset)
{
// List of timezones here is not complete - https://bugs.php.net/bug.php?id=44780
if ($tz = timezone_name_from_abbr('', $offset * 3600, 0)) {
return $tz;
}
// try with more complete list (#1489261)
$timezones = array(
'-660' => "Pacific/Apia",
'-600' => "Pacific/Honolulu",
'-570' => "Pacific/Marquesas",
'-540' => "America/Anchorage",
'-480' => "America/Los_Angeles",
'-420' => "America/Denver",
'-360' => "America/Chicago",
'-300' => "America/New_York",
'-270' => "America/Caracas",
'-240' => "America/Halifax",
'-210' => "Canada/Newfoundland",
'-180' => "America/Sao_Paulo",
'-60' => "Atlantic/Azores",
'0' => "Europe/London",
'60' => "Europe/Paris",
'120' => "Europe/Helsinki",
'180' => "Europe/Moscow",
'210' => "Asia/Tehran",
'240' => "Asia/Dubai",
'270' => "Asia/Kabul",
'300' => "Asia/Karachi",
'330' => "Asia/Kolkata",
'345' => "Asia/Katmandu",
'360' => "Asia/Yekaterinburg",
'390' => "Asia/Rangoon",
'420' => "Asia/Krasnoyarsk",
'480' => "Asia/Shanghai",
'525' => "Australia/Eucla",
'540' => "Asia/Tokyo",
'570' => "Australia/Adelaide",
'600' => "Australia/Melbourne",
'630' => "Australia/Lord_Howe",
'660' => "Asia/Vladivostok",
'690' => "Pacific/Norfolk",
'720' => "Pacific/Auckland",
'765' => "Pacific/Chatham",
'780' => "Pacific/Enderbury",
'840' => "Pacific/Kiritimati",
);
return $timezones[(string) intval($offset * 60)];
}
/**
* Replace deprecated timezone name with a valid one.
*
* @param string $tzname Timezone name
*
* @return string Timezone name
*/
static public function resolve_timezone_alias($tzname)
{
// http://www.php.net/manual/en/timezones.others.php
// https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
$deprecated_timezones = array(
'Australia/ACT' => 'Australia/Sydney',
'Australia/LHI' => 'Australia/Lord_Howe',
'Australia/North' => 'Australia/Darwin',
'Australia/NSW' => 'Australia/Sydney',
'Australia/Queensland' => 'Australia/Brisbane',
'Australia/South' => 'Australia/Adelaide',
'Australia/Adelaide' => 'Australia/Hobart',
'Australia/Tasmania' => 'Australia/Hobart',
'Australia/Victoria' => 'Australia/Melbourne',
'Australia/West' => 'Australia/Perth',
'Brazil/Acre' => 'America/Rio_Branco',
'Brazil/DeNoronha' => 'America/Noronha',
'Brazil/East' => 'America/Sao_Paulo',
'Brazil/West' => 'America/Manaus',
'Canada/Atlantic' => 'America/Halifax',
'Canada/Central' => 'America/Winnipeg',
'Canada/Eastern' => 'America/Toronto',
'Canada/Mountain' => 'America/Edmonton',
'Canada/Newfoundland' => 'America/St_Johns',
'Canada/Pacific' => 'America/Vancouver',
'Canada/Saskatchewan' => 'America/Regina',
'Canada/Yukon' => 'America/Whitehorse',
'CET' => 'Europe/Berlin',
'Chile/Continental' => 'America/Santiago',
'Chile/EasterIsland' => 'Pacific/Easter',
'CST6CDT' => 'America/Chicago',
'Cuba' => ' America/Havana',
'EET' => 'Europe/Berlin',
'Egypt' => 'Africa/Cairo',
'Eire' => 'Europe/Dublin',
'EST' => 'America/New_York',
'EST5EDT' => 'America/New_York',
'Factory' => 'UTC', // ?
'GB' => 'Europe/London',
'GB-Eire' => 'Europe/London',
'GMT' => 'UTC',
'GMT+0' => 'UTC',
'GMT-0' => 'UTC',
'GMT0' => 'UTC',
'Greenwich' => 'UTC',
'Hongkong' => 'Asia/Hong_Kong',
'HST' => 'Pacific/Honolulu',
'Iceland' => 'Atlantic/Reykjavik',
'Iran' => 'Asia/Tehran',
'Israel' => 'Asia/Jerusalem',
'Jamaica' => 'America/Jamaica',
'Japan' => 'Asia/Tokyo',
'Kwajalein' => 'Pacific/Kwajalein',
'Libya' => 'Africa/Tripoli',
'MET' => 'Europe/Berlin',
'Mexico/BajaNorte' => 'America/Tijuana',
'Mexico/BajaSur' => 'America/Mazatlan',
'Mexico/General' => 'America/Mexico_City',
'MST' => 'America/Denver',
'MST7MDT' => 'America/Denver',
'Navajo' => 'America/Denver',
'NZ' => 'Pacific/Auckland',
'NZ-CHAT' => 'Pacific/Chatham',
'Poland' => 'Europe/Warsaw',
'Portugal' => 'Europe/Lisbon',
'PRC' => 'Asia/Shanghai',
'PST8PDT' => 'America/Los_Angeles',
'ROC' => 'Asia/Taipei',
'ROK' => 'Asia/Seoul',
'Singapore' => 'Asia/Singapore',
'Turkey' => 'Europe/Istanbul',
'UCT' => 'UTC',
'Universal' => 'UTC',
'US/Alaska' => 'America/Anchorage',
'US/Aleutian' => 'America/Adak',
'US/Arizona' => 'America/Phoenix',
'US/Central' => 'America/Chicago',
'US/East-Indiana' => 'America/Indiana/Indianapolis',
'US/Eastern' => 'America/New_York',
'US/Hawaii' => 'Pacific/Honolulu',
'US/Indiana-Starke' => 'America/Indiana/Knox',
'US/Michigan' => 'America/Detroit',
'US/Mountain' => 'America/Denver',
'US/Pacific' => 'America/Los_Angeles',
'US/Pacific-New' => 'America/Los_Angeles',
'US/Samoa' => 'Pacific/Pago_Pago',
'W-SU' => 'Europe/Moscow',
'WET' => 'Europe/Berlin',
'Z' => 'UTC',
'Zulu' => 'UTC',
// Some of these Etc/X zones are not deprecated, but still problematic
'Etc/GMT' => 'UTC',
'Etc/GMT+0' => 'UTC',
'Etc/GMT+1' => 'Atlantic/Azores',
'Etc/GMT+10' => 'Pacific/Honolulu',
'Etc/GMT+11' => 'Pacific/Midway',
'Etc/GMT+12' => 'Pacific/Auckland',
'Etc/GMT+2' => 'America/Noronha',
'Etc/GMT+3' => 'America/Argentina/Buenos_Aires',
'Etc/GMT+4' => 'America/Manaus',
'Etc/GMT+5' => 'America/New_York',
'Etc/GMT+6' => 'America/Chicago',
'Etc/GMT+7' => 'America/Denver',
'Etc/GMT+8' => 'America/Los_Angeles',
'Etc/GMT+9' => 'America/Anchorage',
'Etc/GMT-0' => 'UTC',
'Etc/GMT-1' => 'Europe/Berlin',
'Etc/GMT-10' => 'Australia/Sydney',
'Etc/GMT-11' => 'Pacific/Norfolk',
'Etc/GMT-12' => 'Pacific/Auckland',
'Etc/GMT-13' => 'Pacific/Apia',
'Etc/GMT-14' => 'Pacific/Kiritimati',
'Etc/GMT-2' => 'Africa/Cairo',
'Etc/GMT-3' => 'Europe/Moscow',
'Etc/GMT-4' => 'Europe/Samara',
'Etc/GMT-5' => 'Asia/Yekaterinburg',
'Etc/GMT-6' => 'Asia/Almaty',
'Etc/GMT-7' => 'Asia/Bangkok',
'Etc/GMT-8' => 'Asia/Hong_Kong',
'Etc/GMT-9' => 'Asia/Tokyo',
'Etc/GMT0' => 'UTC',
'Etc/Greenwich' => 'UTC',
'Etc/UCT' => 'UTC',
'Etc/Universal' => 'UTC',
'Etc/UTC' => 'UTC',
'Etc/Zulu' => 'UTC',
);
return $deprecated_timezones[$tzname] ?: $tzname;
}
}
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