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, $now));
}
}
}
/**
* Converts this date to a new time zone, given a valid time zone ID
*
* Converts this date to a new time zone, given a valid time zone ID
* WARNING: This may not work correctly if your system does not allow
* putenv() or if localtime() does not work in your environment. See
* Date::TimeZone::inDaylightTime() for more information.
*
* @access public
* @param string id a time zone id
*/
function convertTZbyID($id)
{
if (Date_TimeZone::isValidID($id)) {
$tz = new Date_TimeZone($id);
} else {
$tz = Date_TimeZone::getDefault();
}
$this->convertTZ($tz);
}
/**
* sets time zone to the default time zone
*
* If PHP version >= 5.1.0, uses the php.ini configuration directive
* 'date.timezone' if set and valid, else the value returned by
* 'date("e")' if valid, else the default specified if the global
* constant '$GLOBALS["_DATE_TIMEZONE_DEFAULT"]', which if itself
* left unset, defaults to "UTC".
*
* N.B. this is a private method; to set the time zone to the
* default publicly you should call 'setTZByID()', that is, with no
* parameter (or a parameter of null).
*
* @return void
* @access private
* @since Method available since Release 1.5.0
*/
function _setTZToDefault()
{
if (function_exists('version_compare') && version_compare(phpversion(), "5.1.0", ">=") && (Date_TimeZone::isValidID($hs_id = ini_get("date.timezone")) || Date_TimeZone::isValidID($hs_id = date("e")))) {
$this->tz = new Date_TimeZone($hs_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";
}
/**
* 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;
}
/**
* 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 $retval;
}
/**
* Sets the time zone of this date with the given time zone id
*
* Sets the time zone of this date with the given
* time zone id, or to the system default if the
* given id is invalid. Does not alter the date/time,
* only assigns a new time zone. For conversion, use
* convertTZ().
*
* @access public
* @param string id a time zone id
*/
function setTZbyID($id)
{
if (Date_TimeZone::isValidID($id)) {
$this->tz = new Date_TimeZone($id);
} else {
$this->tz = Date_TimeZone::getDefault();
}
}
/**
* 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 {
$timezone = new Date_TimeZone('UTC');
$tz = $timezone->getDefault();
}
$this->convertTZ($tz);
}
