function &getClientTZ()
{
// if SITE_TIME_ZONE is present, use it, otherwise, best guess as to server's local time zone
if (defined('SITE_TIME_ZONE') && Date_TimeZone::isValidID(SITE_TIME_ZONE)) {
$client_tz = new Date_TimeZone(SITE_TIME_ZONE);
} else {
$client_tz =& Date_TimeZone::getDefault();
}
return $client_tz;
}
function NDate($date = null, $now = null)
{
$n = func_num_args();
$p = $n == 3;
$args = func_get_args();
$this->tz = Date_TimeZone::getDefault();
if ($n == 0) {
return parent::Date();
}
$n--;
$date = $args[$n];
if (is_array($date)) {
$this->setDate($date);
} elseif (is_int($date) || is_string($date) && (string) (int) $date == (string) $date && $date < 9876543210 && $date > 01234567) {
// Looks like a UNIX timestamp
parent::Date($date);
} elseif (is_string($date)) {
$this->setDate(strtotime($date));
} else {
parent::Date($date);
}
while ($n > 0) {
$n--;
$now = $this->getDate(DATE_FORMAT_UNIXTIME);
$date = $args[$n];
switch ($date) {
case "1st":
case "first":
$this->setDay(1);
break;
case "last":
$this->setDay($this->getDaysInMonth());
break;
default:
$this->setDate(strtotime($date, $now));
}
}
}
/**
* Sets the system default time zone to the time zone in $id
*
* Sets the system default time zone to the time zone in $id
*
* @access public
* @param string $id the time zone id to use
*/
function setDefault($id)
{
global $default;
if (Date_TimeZone::isValidID($id)) {
$default = $id;
}
}
/**
* Returns an array of available timezones.
*
* @static
* @param boolean $addBlank If set to true an empty entry will be added
* to the beginning of the array.
* @return array An array containing all the available timezones.
*/
function availableTimezones($addBlank = false)
{
global $_DATE_TIMEZONE_DATA;
$_aTimezoneBcData = array('Brazil/Acre', 'Brazil/DeNoronha', 'Brazil/East', 'Brazil/West', 'Canada/Atlantic', 'Canada/Central', 'Canada/East-Saskatchewan', 'Canada/Eastern', 'Canada/Mountain', 'Canada/Newfoundland', 'Canada/Pacific', 'Canada/Saskatchewan', 'Canada/Yukon', 'CET', 'Chile/Continental', 'Chile/EasterIsland', 'CST6CDT', 'Cuba', 'EET', 'Egypt', 'Eire', 'EST', 'EST5EDT', 'Etc/GMT', 'Etc/GMT+0', 'Etc/GMT+1', 'Etc/GMT+10', 'Etc/GMT+11', 'Etc/GMT+12', 'Etc/GMT+2', 'Etc/GMT+3', 'Etc/GMT+4', 'Etc/GMT+5', 'Etc/GMT+6', 'Etc/GMT+7', 'Etc/GMT+8', 'Etc/GMT+9', 'Etc/GMT-0', 'Etc/GMT-1', 'Etc/GMT-10', 'Etc/GMT-11', 'Etc/GMT-12', 'Etc/GMT-13', 'Etc/GMT-14', 'Etc/GMT-2', 'Etc/GMT-3', 'Etc/GMT-4', 'Etc/GMT-5', 'Etc/GMT-6', 'Etc/GMT-7', 'Etc/GMT-8', 'Etc/GMT-9', 'Etc/GMT0', 'Etc/Greenwich', 'Etc/UCT', 'Etc/Universal', 'Etc/UTC', 'Etc/Zulu', 'Factory GB', 'GB-Eire', 'GMT', 'GMT+0', 'GMT-0', 'GMT0', 'Greenwich', 'Hongkong', 'HST', 'Iceland', 'Iran', 'Israel', 'Jamaica', 'Japan', 'Kwajalein', 'Libya', 'MET', 'Mexico/BajaNorte', 'Mexico/BajaSur', 'Mexico/General', 'MST', 'MST7MDT', 'Navajo', 'NZ', 'NZ-CHAT', 'Poland', 'Portugal', 'PRC', 'PST8PDT', 'ROC', 'ROK', 'Singapore', 'Turkey', 'UCT', 'Universal', 'US/Alaska', 'US/Aleutian', 'US/Arizona', 'US/Central', 'US/East-Indiana', 'US/Eastern', 'US/Hawaii', 'US/Indiana-Starke', 'US/Michigan', 'US/Mountain', 'US/Pacific', 'US/Pacific-New', 'US/Samoa', 'UTC', 'W-SU', 'WET', 'Zulu');
// Load translations
require_once MAX_PATH . '/lib/max/language/Loader.php';
Language_Loader::load('timezone');
// Load global array of timezones
require_once MAX_PATH . '/lib/pear/Date/TimeZone.php';
$aTimezoneKey = Date_TimeZone::getAvailableIDs();
if (!defined('MAX_PATH')) {
$tz = OX_Admin_Timezones::getTimezone();
} else {
$tz = $GLOBALS['_MAX']['PREF']['timezone'];
if (is_null($tz)) {
$tz = OX_Admin_Timezones::getTimezone();
}
}
foreach ($aTimezoneKey as $key) {
if (in_array($tz, $_aTimezoneBcData) && $key == $tz || !in_array($key, $_aTimezoneBcData)) {
// Calculate the timezone offset
$offset = OX_Admin_Timezones::_convertOffset($_DATE_TIMEZONE_DATA[$key]['offset']);
// Build the arrays used for sorting time zones
$origOffset = $_DATE_TIMEZONE_DATA[$key]['offset'];
$key = !empty($GLOBALS['strTimezoneList'][$key]) ? $GLOBALS['strTimezoneList'][$key] : $key;
if ($origOffset >= 0) {
$aTimezone[$offset][$key] = "(GMT+{$offset}) {$key}";
} else {
$aNegTimezone[$key] = "(GMT-{$offset}) {$key}";
}
}
}
// Sort timezones with positive offsets descending, and negative
// offests ascending.
// Add initial empty key/value pair
if ($addBlank) {
$aResult[] = '';
}
// Sort time zones
asort($aNegTimezone);
// Reverse array element order while preserving alphabetical order
$hasRun = false;
foreach ($aTimezone as $offset => $aValue) {
if ($hasRun == false) {
$aRevTimezone[] = $aValue;
$hasRun = true;
} else {
array_unshift($aRevTimezone, $aValue);
}
}
// Build the result array
foreach ($aRevTimezone as $aValue) {
foreach ($aValue as $k => $v) {
$aResult[$k] = $v;
}
}
foreach ($aNegTimezone as $key => $value) {
$aResult[$key] = $value;
}
return $aResult;
}
function get_display_timezone($_user = false)
{
global $prefs, $user;
if ($_user === false || $_user == $user) {
// If the requested timezone is the current user timezone
$tz = $prefs['display_timezone'];
} elseif ($_user) {
// ... else, get the user timezone preferences from DB
$tz = $this->get_user_preference($_user, 'display_timezone');
if (!Date_TimeZone::isValidID($tz)) {
$tz = $prefs['server_timezone'];
}
}
return $tz;
}
/**
* Get the user's preferred timezone
*
* @return string name of the timezone
* @static
*
*/
public static function getUserTimeZone()
{
global $_CONF, $_USER;
// handle like the theme cookie, i.e. use if user is not logged in
if (isset($_COOKIE[$_CONF['cookie_tzid']]) && empty($_USER['tzid'])) {
$_USER['tzid'] = $_COOKIE[$_CONF['cookie_tzid']];
}
if (!empty($_USER['tzid'])) {
$timezone = $_USER['tzid'];
} elseif (!empty($_CONF['timezone'])) {
$timezone = $_CONF['timezone'];
} elseif (function_exists('date_default_timezone_get')) {
$timezone = @date_default_timezone_get();
} else {
require_once 'Date/TimeZone.php';
$tz_obj = Date_TimeZone::getDefault();
$timezone = $tz_obj->id;
}
return $timezone;
}
/**
* Provide a list of available timezones
*
* @return array array of (timezone-short-name, timezone-long-name) pairs
*/
public static function listAvailableTimeZones()
{
$timezones = array();
// use only timezones that contain one of these
$useOnly = array('Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific', 'UTC');
// check if we can use the DateTimeZone class
$useDateTimeZone = false;
if (class_exists('DateTimeZone') && class_exists('ReflectionClass')) {
$rc = new ReflectionClass('DateTimeZone');
if ($rc->hasMethod('listAbbreviations')) {
$useDateTimeZone = true;
}
}
if ($useDateTimeZone) {
$T = DateTimeZone::listAbbreviations();
foreach ($T as $tzId => $entries) {
$shortName = strtoupper($tzId);
foreach ($entries as $data) {
$tzCheck = explode('/', $data['timezone_id']);
if (!in_array($tzCheck[0], $useOnly)) {
continue;
}
$hours = $data['offset'] / 3600;
$hours = (int) ($hours * 100) / 100;
if ($hours > 0) {
$hours = "+{$hours}";
}
$tzCode = str_replace('_', ' ', $data['timezone_id']);
$tzCode = htmlspecialchars($tzCode);
$formattedTimezone = "{$hours}, {$shortName} ({$tzCode})";
$timezones[$data['timezone_id']] = $formattedTimezone;
}
}
} else {
// DateTimeZone not available - use PEAR Date class
// Load Date_TimeZone class
Date_TimeZone::getDefault();
$T = $GLOBALS['_DATE_TIMEZONE_DATA'];
foreach ($T as $tzId => $tDetails) {
$tzCheck = explode('/', $tzId);
if (!in_array($tzCheck[0], $useOnly)) {
continue;
}
if (!empty($tzCheck[1]) && strpos($tzCheck[1], 'Riyadh') === 0) {
// these time zones are based on solar time and not widely
// supported - skip
continue;
}
$tzCode = str_replace('_', ' ', $tzId);
$tzCode = htmlspecialchars($tzCode);
$hours = $tDetails['offset'] / (3600 * 1000);
$hours = (int) ($hours * 100) / 100;
if ($hours > 0) {
$hours = "+{$hours}";
}
$formattedTimezone = "{$hours}, {$tDetails['shortname']} ({$tzCode})";
$timezones[$tzId] = $formattedTimezone;
}
}
uasort($timezones, array('TimeZoneConfig', '_sort_by_timezone'));
return $timezones;
}
/**
* Converts this date to a new time zone, given a valid time zone ID
*
* Converts this date to a new time zone, given a valid time zone ID
* WARNING: This may not work correctly if your system does not allow
* putenv() or if localtime() does not work in your environment. See
* Date::TimeZone::inDaylightTime() for more information.
*
* @access public
* @param string id a time zone id
*/
function convertTZbyID($id)
{
if (Date_TimeZone::isValidID($id)) {
$tz = new Date_TimeZone($id);
} else {
$tz = Date_TimeZone::getDefault();
}
$this->convertTZ($tz);
}
/**
* Converts this date to a new time zone, given a valid time zone ID
*
* Previously this might not have worked correctly if your system did
* not allow putenv() or if localtime() does not work in your
* environment, but this implementation is no longer used.
*
* @param string $ps_id a valid time zone id, e.g. 'Europe/London'
*
* @return void
* @access public
* @see Date::setTZByID(), Date_TimeZone::isValidID(),
* Date_TimeZone::Date_TimeZone()
*/
function convertTZByID($ps_id)
{
if (!Date_TimeZone::isValidID($ps_id)) {
return PEAR::raiseError("Invalid time zone ID '{$ps_id}'", DATE_ERROR_INVALIDTIMEZONE);
}
$res = $this->convertTZ(new Date_TimeZone($ps_id));
if (PEAR::isError($res)) {
return $res;
}
}
function calc_timezone($newdate)
{
global $pref;
if (!$pref['datetime'] || !$this->TimeZone) {
$newdate = preg_replace('/UT$/', 'UTC', $newdate);
$newdate = date("D, j M Y G:i O", strtotime($newdate));
return $newdate;
}
require_once 'Date.php';
// convert to ISO 8601 format
if (preg_match('/(\\d+) ([a-z]+) (\\d\\d\\d?\\d?) (\\d\\d:\\d\\d:\\d\\d) ((\\+|-)\\d\\d\\d\\d|[a-z]+)/i', $newdate, $m)) {
if (strlen($m[1]) == 1) {
$m[1] = "0{$m['1']}";
}
// If a 2 digit date is given then we need to make an assumption
// about the actual year. If year >= 80 we can safely assume that
// it's a 20th Century date e.g. 89 becomes 1989. Otherwise lets make it
// a 21st Century date, e.g. 08 becomes 2008
if (strlen($m[3]) == 2) {
$m[3] = $m[3] >= 80 ? "19{$m['3']}" : "20{$m['3']}";
}
// format month name with uppercase firt char e.g Sep
$m[2] = ucfirst(strtolower($m[2]));
// Convert Timezone ID to GMT offset
if (!is_numeric($m[5])) {
// convert UT > UTC
if ($m[5] == 'UT') {
$m[5] = 'UTC';
}
$dt = new Date_TimeZone($m[5]);
$m[5] = $dt->getRawOffset();
if ($m[5] == 0) {
$m[5] = 'Z';
} else {
$m[5] = $m[5] / 36000;
settype($m[5], 'string');
$m[5] = preg_replace('/(-|\\+)/', '${1}0', $m[5]);
}
}
$newdate = "{$m['3']}{$this->months[$m[2]]}{$m['1']}T{$m['4']}{$m['5']}";
// Do timezone conversion
$date = new Date($newdate);
$date->convertTZbyID($this->TimeZone);
$newdate = $date->getDate();
$newdate = date("D, j M Y G:i O", strtotime($newdate));
} elseif (preg_match('/(\\d+) ([a-z]+) (\\d\\d\\d\\d) (\\d\\d:\\d\\d:\\d\\d) (\\w+)/i', $newdate, $m)) {
if (strlen($m[1]) == 1) {
$m[1] = "0{$m['1']}";
}
// If a 2 digit date is given then we need to make an assumption
// about the actual year. If year >= 80 we can safely assume that
// it's a 20th Century date e.g. 89 becomes 1989. Otherwise lets make it
// a 21st Century date, e.g. 08 becomes 2008
if (strlen($m[3]) == 2) {
$m[3] = $m[3] >= 80 ? "19{$m['3']}" : "20{$m['3']}";
}
// format month name with uppercase firt char e.g Sep
$m[2] = ucfirst(strtolower($m[2]));
$newdate = "{$m['3']}{$this->months[$m[2]]}{$m['1']}";
// Convert date from timezone ID, rather than +0900 or -1100 format, format in GMT, MST, etc
$date = new Date($newdate);
$date->setTZByID($m[5]);
$newdate = $date->getDate();
$newdate = date("D, j M Y G:i O", strtotime($newdate));
} else {
$newdate = date("D, j M Y G:i O", strtotime($newdate));
}
return $newdate;
}
/**
* Return a string expression of the server time zone
*
* @return mixed '(+|-)\d\d:\d\d' or false
* @see PEAR Date/TimeZone.php
*/
private function getTimezoneStr()
{
global $_CONF;
static $retval = null;
if ($retval === null) {
if (isset($_CONF['timezone'])) {
$timezone = $_CONF['timezone'];
// Load Date_TimeZone class
Date_TimeZone::getDefault();
if (array_key_exists($timezone, $GLOBALS['_DATE_TIMEZONE_DATA'])) {
$offset = $GLOBALS['_DATE_TIMEZONE_DATA'][$timezone]['offset'];
if ($offset >= 0) {
$retval = '+';
} else {
$retval = '-';
$offset = -$offset;
}
$hour = floor($offset / 3600000);
$min = ($offset - 3600000 * $hour) % 60000;
$retval .= sprintf('%02d:%02d', $hour, $min);
} else {
COM_errorLog(__METHOD__ . ': $_CONF[\'timezone\'] is wrong: ' . $_CONF['timezone']);
$retval = false;
}
} else {
$retval = false;
}
}
return $retval;
}
public function getTaskNotify(CTask $task, $user, $projname)
{
$body = $this->_AppUI->_('Project', UI_OUTPUT_RAW) . ":\t" . $projname . "\n";
$body .= $this->_AppUI->_('Task', UI_OUTPUT_RAW) . ":\t\t" . $task->task_name . "\n";
$body .= $this->_AppUI->_('Priority', UI_OUTPUT_RAW) . ":\t" . $task->task_priority . "\n";
$body .= $this->_AppUI->_('Progress', UI_OUTPUT_RAW) . ":\t" . $task->task_percent_complete . "%\n";
$tmp_tz = $this->_AppUI->getPref('TIMEZONE');
$user_prefs = $this->_AppUI->loadPrefs($user['assignee_id'], true);
$this->_AppUI->user_prefs['TIMEZONE'] = $user_prefs['TIMEZONE'];
$start_date = new w2p_Utilities_Date($this->_AppUI->formatTZAwareTime($task->task_start_date, '%Y-%m-%d %T'));
$fmt_start_date = $start_date->format($user_prefs['DISPLAYFORMAT']);
$end_date = new w2p_Utilities_Date($this->_AppUI->formatTZAwareTime($task->task_end_date, '%Y-%m-%d %T'));
$fmt_end_date = $end_date->format($user_prefs['DISPLAYFORMAT']);
$timezoneObj = new Date_TimeZone($user_prefs['TIMEZONE']);
$tzString = $timezoneObj->getShortName();
$this->_AppUI->user_prefs['TIMEZONE'] = $tmp_tz;
// Format dates using preferences but add T as Timezone abbreviation
$body .= $this->_AppUI->_('Start Date') . ":\t" . $fmt_start_date . " {$tzString}\n";
$body .= $this->_AppUI->_('Finish Date') . ":\t" . $fmt_end_date . " {$tzString}\n";
$body .= $this->_AppUI->_('URL', UI_OUTPUT_RAW) . ":\t\t" . W2P_BASE_URL . '/index.php?m=tasks&a=view&task_id=' . $task->task_id . "\n\n";
$body .= $this->_AppUI->_('Description', UI_OUTPUT_RAW) . ': ' . "\n" . $task->task_description;
if ($user['creator_email']) {
$body .= "\n\n" . $this->_AppUI->_('Creator', UI_OUTPUT_RAW) . ':' . "\n" . $user['creator_name'] . ', ' . $user['creator_email'];
}
$body .= "\n\n" . $this->_AppUI->_('Owner', UI_OUTPUT_RAW) . ':' . "\n" . $user['owner_name'] . ', ' . $user['owner_email'];
if (isset($comment) && $comment != '') {
$body .= "\n\n" . $comment;
}
return $body;
}
$prefs['style'] = $prefs['theme'];
}
} else {
$allowMsgs = 'n';
}
if (isset($_SERVER['REMOTE_ADDR'])) {
$IP = $_SERVER['REMOTE_ADDR'];
$smarty->assign('IP', $IP);
}
if ($prefs['users_prefs_display_timezone'] == 'Site' || isset($user_preferences[$user]['display_timezone']) && $user_preferences[$user]['display_timezone'] == 'Site') {
// Everybody stays in the time zone of the server
$prefs['display_timezone'] = $prefs['server_timezone'];
} elseif (!isset($user_preferences[$user]['display_timezone']) || $user_preferences[$user]['display_timezone'] == '') {
// If the display timezone is not known ...
if (isset($_COOKIE['local_tz']) && eregi('[A-Z]', $_COOKIE['local_tz'])) {
// ... we try to use the timezone detected by javascript and stored in cookies
if ($_COOKIE['local_tz'] == 'CEST' || $_COOKIE['local_tz'] == 'HAEC') {
// CEST (and HAEC, returned by Safari on Mac) is not recognized as a DST timezone (with daylightsavings) by PEAR Date
// ... So use one equivalent timezone name
$prefs['display_timezone'] = 'Europe/Paris';
} else {
$prefs['display_timezone'] = $_COOKIE['local_tz'];
}
if (!Date_TimeZone::isValidID($prefs['display_timezone'])) {
$prefs['display_timezone'] = $prefs['server_timezone'];
}
} else {
// ... and we fallback to the server timezone if the cookie value is not available
$prefs['display_timezone'] = $prefs['server_timezone'];
}
}
/**
* Method used to get the full list of available timezones to be
* presented to the user.
*
* @access public
* @return array The list of timezones
*/
function getTimezoneList()
{
return Date_TimeZone::getAvailableIDs();
}
/**
* Sets the time zone of this date with the given time zone id
*
* Sets the time zone of this date with the given
* time zone id, or to the system default if the
* given id is invalid. Does not alter the date/time,
* only assigns a new time zone. For conversion, use
* convertTZ().
*
* @access public
* @param string id a time zone id
*/
function setTZbyID($id)
{
if (Date_TimeZone::isValidID($id)) {
$this->tz = new Date_TimeZone($id);
} else {
$this->tz = Date_TimeZone::getDefault();
}
}
<?php
require_once 'Date.php';
$_DATE_TIMEZONE_DEFAULT = 'Pacific/Chatham';
$tz = Date_TimeZone::getDefault();
if ($tz->id != $_DATE_TIMEZONE_DEFAULT && $tz->id != 'Pacific/Chatham') {
echo "setDefault Failed\n";
}
Date_TimeZone::setDefault('CST');
$default = 'EST';
$tz = Date_TimeZone::getDefault();
if ($tz->id != $_DATE_TIMEZONE_DEFAULT && $tz->id != 'EST') {
echo "setDefault Failed\n";
}
/**
* Is this time zone equivalent to another
*
* Tests to see if this time zone is equivalent to a given time zone object.
* Equivalence in this context consists in the two time zones having:
*
* an equal offset from UTC in both standard and Summer time (if
* the time zones observe Summer time)
* the same Summer time start and end rules, that is, the two time zones
* must switch from standard time to Summer time, and vice versa, on the
* same day and at the same time
*
* @param object $pm_tz the Date_TimeZone object to test, or a valid time
* zone ID
*
* @return bool true if this time zone is equivalent to the supplied
* time zone
* @access public
*/
function isEquivalent($pm_tz)
{
if (is_a($pm_tz, "Date_TimeZone")) {
if ($pm_tz->getID() == $this->id) {
return true;
}
} else {
if (!Date_TimeZone::isValidID($pm_tz)) {
return PEAR::raiseError("Invalid time zone ID '{$pm_tz}'", DATE_ERROR_INVALIDTIMEZONE);
}
if ($pm_tz == $this->id) {
return true;
}
$pm_tz = new Date_TimeZone($pm_tz);
}
if ($this->getRawOffset() == $pm_tz->getRawOffset() && $this->hasDaylightTime() == $pm_tz->hasDaylightTime() && $this->getDSTSavings() == $pm_tz->getDSTSavings() && $this->getSummerTimeStartMonth() == $pm_tz->getSummerTimeStartMonth() && $this->getSummerTimeStartDay() == $pm_tz->getSummerTimeStartDay() && $this->getSummerTimeStartTime() == $pm_tz->getSummerTimeStartTime() && $this->getSummerTimeEndMonth() == $pm_tz->getSummerTimeEndMonth() && $this->getSummerTimeEndDay() == $pm_tz->getSummerTimeEndDay() && $this->getSummerTimeEndTime() == $pm_tz->getSummerTimeEndTime()) {
return true;
} else {
return false;
}
}
/**
* Sets the system default time zone to the time zone in $id
*
* @access public
* @param string $id the time zone id to use
*/
public static function setDefault($id)
{
global $default;
if ($res = Date_TimeZone::isValidID($id)) {
$default = $id;
}
}
/**
* Sets the system default time zone to the time zone in $id
*
* Sets the system default time zone to the time zone in $id
*
* @access public
* @param string $id the time zone id to use
*/
function setDefault($id)
{
global $_DATE_TIMEZONE_DEFAULT;
if (Date_TimeZone::isValidID($id)) {
$_DATE_TIMEZONE_DEFAULT = $id;
}
}
public static function convertTimeZone($epoch, $timezone)
{
if ($timezone == '') {
return $epoch;
}
$old_timezone_offset = TTDate::getTimeZoneOffset();
try {
//Use PEAR Date class to convert timezones instead of PHP v5.2 date object so we can still use older PHP versions for distros like CentOS.
require_once 'Date.php';
$d = new Date(date('r', $epoch));
$tz = new Date_TimeZone($timezone);
$new_timezone_offset = $tz->getOffset($d) / 1000;
return $epoch - ($old_timezone_offset - $new_timezone_offset);
} catch (Exception $e) {
return $epoch;
}
return $epoch;
}
/**
* Sets the system default time zone to the time zone in $id
*
* Sets the system default time zone to the time zone in $id
*
* @access public
* @param string $id the time zone id to use
*/
function setDefault($id)
{
if (Date_TimeZone::isValidID($id)) {
$GLOBALS['_DATE_TIMEZONE_DEFAULT'] = $id;
}
}
/**
* Converts this date to a new time zone, given a valid time zone ID
*
* Converts this date to a new time zone, given a valid time zone ID
* WARNING: This may not work correctly if your system does not allow
* putenv() or if localtime() does not work in your environment. See
* Date::TimeZone::inDaylightTime() for more information.
*
* @access public
* @param string id a time zone id
*/
function convertTZbyID($id)
{
if (Date_TimeZone::isValidID($id)) {
$tz = new Date_TimeZone($id);
} else {
$timezone = new Date_TimeZone('UTC');
$tz = $timezone->getDefault();
}
$this->convertTZ($tz);
}