You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
141 lines
4.0 KiB
141 lines
4.0 KiB
<?php
|
|
|
|
/**
|
|
* PHPExcel
|
|
*
|
|
* Copyright (c) 2006 - 2014 PHPExcel
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* @category PHPExcel
|
|
* @package PHPExcel_Shared
|
|
* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
|
|
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
|
|
* @version ##VERSION##, ##DATE##
|
|
*/
|
|
|
|
|
|
/**
|
|
* PHPExcel_Shared_TimeZone
|
|
*
|
|
* @category PHPExcel
|
|
* @package PHPExcel_Shared
|
|
* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
|
|
*/
|
|
class PHPExcel_Shared_TimeZone
|
|
{
|
|
/*
|
|
* Default Timezone used for date/time conversions
|
|
*
|
|
* @private
|
|
* @var string
|
|
*/
|
|
protected static $_timezone = 'UTC';
|
|
|
|
/**
|
|
* Validate a Timezone name
|
|
*
|
|
* @param string $timezone Time zone (e.g. 'Europe/London')
|
|
* @return boolean Success or failure
|
|
*/
|
|
public static function _validateTimeZone($timezone) {
|
|
if (in_array($timezone, DateTimeZone::listIdentifiers())) {
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Set the Default Timezone used for date/time conversions
|
|
*
|
|
* @param string $timezone Time zone (e.g. 'Europe/London')
|
|
* @return boolean Success or failure
|
|
*/
|
|
public static function setTimeZone($timezone) {
|
|
if (self::_validateTimezone($timezone)) {
|
|
self::$_timezone = $timezone;
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
} // function setTimezone()
|
|
|
|
|
|
/**
|
|
* Return the Default Timezone used for date/time conversions
|
|
*
|
|
* @return string Timezone (e.g. 'Europe/London')
|
|
*/
|
|
public static function getTimeZone() {
|
|
return self::$_timezone;
|
|
} // function getTimezone()
|
|
|
|
|
|
/**
|
|
* Return the Timezone transition for the specified timezone and timestamp
|
|
*
|
|
* @param DateTimeZone $objTimezone The timezone for finding the transitions
|
|
* @param integer $timestamp PHP date/time value for finding the current transition
|
|
* @return array The current transition details
|
|
*/
|
|
private static function _getTimezoneTransitions($objTimezone, $timestamp) {
|
|
$allTransitions = $objTimezone->getTransitions();
|
|
$transitions = array();
|
|
foreach($allTransitions as $key => $transition) {
|
|
if ($transition['ts'] > $timestamp) {
|
|
$transitions[] = ($key > 0) ? $allTransitions[$key - 1] : $transition;
|
|
break;
|
|
}
|
|
if (empty($transitions)) {
|
|
$transitions[] = end($allTransitions);
|
|
}
|
|
}
|
|
|
|
return $transitions;
|
|
}
|
|
|
|
/**
|
|
* Return the Timezone offset used for date/time conversions to/from UST
|
|
* This requires both the timezone and the calculated date/time to allow for local DST
|
|
*
|
|
* @param string $timezone The timezone for finding the adjustment to UST
|
|
* @param integer $timestamp PHP date/time value
|
|
* @return integer Number of seconds for timezone adjustment
|
|
* @throws PHPExcel_Exception
|
|
*/
|
|
public static function getTimeZoneAdjustment($timezone, $timestamp) {
|
|
if ($timezone !== NULL) {
|
|
if (!self::_validateTimezone($timezone)) {
|
|
throw new PHPExcel_Exception("Invalid timezone " . $timezone);
|
|
}
|
|
} else {
|
|
$timezone = self::$_timezone;
|
|
}
|
|
|
|
if ($timezone == 'UST') {
|
|
return 0;
|
|
}
|
|
|
|
$objTimezone = new DateTimeZone($timezone);
|
|
if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
|
|
$transitions = $objTimezone->getTransitions($timestamp,$timestamp);
|
|
} else {
|
|
$transitions = self::_getTimezoneTransitions($objTimezone, $timestamp);
|
|
}
|
|
|
|
return (count($transitions) > 0) ? $transitions[0]['offset'] : 0;
|
|
}
|
|
|
|
}
|