Providing support for timezone adjustments in date/time conversion methods
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Mark Baker
parent
63c5cbc98e
commit
53a32ce7f7
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@ -67,18 +67,26 @@ class PHPExcel_Shared_Date
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* @private
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* @var int
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*/
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private static $ExcelBaseDate = self::CALENDAR_WINDOWS_1900;
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private static $_excelBaseDate = self::CALENDAR_WINDOWS_1900;
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/*
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* Default Timezone used for date/time conversions
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*
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* @private
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* @var string
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*/
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private static $_timezone = 'UTC';
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/**
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* Set the Excel calendar (Windows 1900 or Mac 1904)
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*
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* @param integer $baseDate Excel base date
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* @param integer $baseDate Excel base date (1900 or 1904)
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* @return boolean Success or failure
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*/
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public static function setExcelCalendar($baseDate) {
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if (($baseDate == self::CALENDAR_WINDOWS_1900) ||
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($baseDate == self::CALENDAR_MAC_1904)) {
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self::$ExcelBaseDate = $baseDate;
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self::$_excelBaseDate = $baseDate;
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return TRUE;
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}
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return FALSE;
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@ -88,33 +96,116 @@ class PHPExcel_Shared_Date
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/**
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* Return the Excel calendar (Windows 1900 or Mac 1904)
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*
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* @return integer $baseDate Excel base date
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* @return integer Excel base date (1900 or 1904)
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*/
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public static function getExcelCalendar() {
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return self::$ExcelBaseDate;
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return self::$_excelBaseDate;
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} // function getExcelCalendar()
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/**
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* Convert a date from Excel to PHP
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* Validate a Timezone value
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*
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* @param long $dateValue Excel date/time value
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* @return long PHP serialized date/time
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* @param string $timezone Time zone (e.g. 'Europe/London')
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* @return boolean Success or failure
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*/
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public static function ExcelToPHP($dateValue = 0) {
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if (self::$ExcelBaseDate == self::CALENDAR_WINDOWS_1900) {
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$myExcelBaseDate = 25569;
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// Adjust for the spurious 29-Feb-1900 (Day 60)
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if ($dateValue < 60) {
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--$myExcelBaseDate;
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private static function _validateTimezone($timezone) {
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if (in_array($timezone, DateTimeZone::listIdentifiers())) {
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Set the Default Timezone used for date/time conversions
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*
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* @param string $timezone Time zone (e.g. 'Europe/London')
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* @return boolean Success or failure
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*/
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public static function setTimezone($timezone) {
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if (self::_validateTimezone($timezone)) {
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self::$_timezone = $timezone;
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return TRUE;
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}
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return FALSE;
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} // function setTimezone()
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/**
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* Return the Default Timezone used for date/time conversions
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*
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* @return string Timezone (e.g. 'Europe/London')
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*/
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public static function getTimezone() {
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return self::$_timezone;
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} // function getTimezone()
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/**
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* Return the Timezone offset used for date/time conversions to/from UST
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* This requires both the timezone and the calculated date/time to allow for local DST
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*
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* @param string $timezone The timezone for finding the adjustment to UST
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* @param integer $timestamp PHP date/time value
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* @return integer Number of seconds for timezone adjustment
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* @throws PHPExcel_Exception
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*/
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private static function _getTimezoneAdjustment($timezone, $timestamp) {
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if ($timezone !== NULL) {
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if (!self::_validateTimezone($timezone)) {
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throw new PHPExcel_Exception("Invalid timezone " . $timezone);
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}
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} else {
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$myExcelBaseDate = 24107;
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$timezone = self::$_timezone;
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}
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if ($timezone == 'UST') {
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return 0;
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}
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$objTimezone = new DateTimeZone($timezone);
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if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
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$transitions = $objTimezone->getTransitions($timestamp,$timestamp);
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} else {
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$allTransitions = $objTimezone->getTransitions();
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$transitions = array();
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foreach($allTransitions as $key => $transition) {
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if ($transition['ts'] > $timestamp) {
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$transitions[] = ($key > 0) ? $allTransitions[$key - 1] : $transitions1[] = $transition;
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break;
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}
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if (empty($transitions)) {
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$transitions[] = end($allTransitions);
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}
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}
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}
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return (count($transitions) > 0) ? $transitions[0]['offset'] : 0;
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}
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/**
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* Convert a date from Excel to PHP
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*
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* @param long $dateValue Excel date/time value
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* @param boolean $adjustToTimezone Flag indicating whether $dateValue should be treated as
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* a UST timestamp, or adjusted to UST
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* @param string $timezone The timezone for finding the adjustment from UST
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* @return long PHP serialized date/time
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*/
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public static function ExcelToPHP($dateValue = 0, $adjustToTimezone = FALSE, $timezone = NULL) {
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if (self::$_excelBaseDate == self::CALENDAR_WINDOWS_1900) {
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$my_excelBaseDate = 25569;
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// Adjust for the spurious 29-Feb-1900 (Day 60)
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if ($dateValue < 60) {
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--$my_excelBaseDate;
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}
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} else {
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$my_excelBaseDate = 24107;
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}
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// Perform conversion
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if ($dateValue >= 1) {
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$utcDays = $dateValue - $myExcelBaseDate;
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$utcDays = $dateValue - $my_excelBaseDate;
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$returnValue = round($utcDays * 86400);
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if (($returnValue <= PHP_INT_MAX) && ($returnValue >= -PHP_INT_MAX)) {
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$returnValue = (integer) $returnValue;
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@ -126,8 +217,10 @@ class PHPExcel_Shared_Date
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$returnValue = (integer) gmmktime($hours, $mins, $secs);
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}
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$timezoneAdjustment = ($adjustToTimezone) ? self::_getTimezoneAdjustment($timezone, $returnValue) : 0;
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// Return
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return $returnValue;
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return $returnValue + $timezoneAdjustment;
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} // function ExcelToPHP()
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@ -159,7 +252,7 @@ class PHPExcel_Shared_Date
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* @return mixed Excel date/time value
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* or boolean FALSE on failure
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*/
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public static function PHPToExcel($dateValue = 0) {
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public static function PHPToExcel($dateValue = 0, $adjustToTimezone = FALSE, $timezone = NULL) {
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$saveTimeZone = date_default_timezone_get();
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date_default_timezone_set('UTC');
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$retValue = FALSE;
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@ -190,16 +283,16 @@ class PHPExcel_Shared_Date
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* @return long Excel date/time value
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*/
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public static function FormattedPHPToExcel($year, $month, $day, $hours=0, $minutes=0, $seconds=0) {
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if (self::$ExcelBaseDate == self::CALENDAR_WINDOWS_1900) {
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if (self::$_excelBaseDate == self::CALENDAR_WINDOWS_1900) {
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//
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// Fudge factor for the erroneous fact that the year 1900 is treated as a Leap Year in MS Excel
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// This affects every date following 28th February 1900
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//
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$excel1900isLeapYear = TRUE;
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if (($year == 1900) && ($month <= 2)) { $excel1900isLeapYear = FALSE; }
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$myExcelBaseDate = 2415020;
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$my_excelBaseDate = 2415020;
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} else {
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$myExcelBaseDate = 2416481;
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$my_excelBaseDate = 2416481;
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$excel1900isLeapYear = FALSE;
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}
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@ -214,7 +307,7 @@ class PHPExcel_Shared_Date
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// Calculate the Julian Date, then subtract the Excel base date (JD 2415020 = 31-Dec-1899 Giving Excel Date of 0)
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$century = substr($year,0,2);
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$decade = substr($year,2,2);
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$excelDate = floor((146097 * $century) / 4) + floor((1461 * $decade) / 4) + floor((153 * $month + 2) / 5) + $day + 1721119 - $myExcelBaseDate + $excel1900isLeapYear;
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$excelDate = floor((146097 * $century) / 4) + floor((1461 * $decade) / 4) + floor((153 * $month + 2) / 5) + $day + 1721119 - $my_excelBaseDate + $excel1900isLeapYear;
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$excelTime = (($hours * 3600) + ($minutes * 60) + $seconds) / 86400;
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@ -34,6 +34,30 @@ class DateTest extends PHPUnit_Framework_TestCase
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$this->assertFalse($result);
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}
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public function testSetTimezone()
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{
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$timezoneValues = array(
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'Europe/Prague',
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'Asia/Tokyo',
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'America/Indiana/Indianapolis',
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'Pacific/Honolulu',
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'Atlantic/St_Helena',
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);
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foreach($timezoneValues as $timezoneValue) {
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$result = call_user_func(array('PHPExcel_Shared_Date','setTimezone'),$timezoneValue);
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$this->assertTrue($result);
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}
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}
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public function testSetTimezoneWithInvalidValue()
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{
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$unsupportedTimezone = 'Etc/GMT+10';
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$result = call_user_func(array('PHPExcel_Shared_Date','setTimezone'),$unsupportedTimezone);
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$this->assertFalse($result);
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}
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/**
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* @dataProvider providerDateTimeExcelToPHP1900
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*/
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@ -161,4 +185,28 @@ class DateTest extends PHPUnit_Framework_TestCase
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return new testDataFileIterator('rawTestData/Shared/DateTimeFormatCodes.data');
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}
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/**
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* @dataProvider providerDateTimeExcelToPHP1900Timezone
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*/
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public function testDateTimeExcelToPHP1900Timezone()
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{
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$result = call_user_func(
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array('PHPExcel_Shared_Date','setExcelCalendar'),
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PHPExcel_Shared_Date::CALENDAR_WINDOWS_1900
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);
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$args = func_get_args();
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$expectedResult = array_pop($args);
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if ($args[0] < 1) {
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$expectedResult += gmmktime(0,0,0);
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}
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$result = call_user_func_array(array('PHPExcel_Shared_Date','ExcelToPHP'),$args);
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$this->assertEquals($expectedResult, $result);
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}
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public function providerDateTimeExcelToPHP1900Timezone()
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{
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return new testDataFileIterator('rawTestData/Shared/DateTimeExcelToPHP1900Timezone.data');
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}
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}
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@ -0,0 +1,23 @@
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#Excel DateTimeStamp Adjust Timezone Result Comments
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22269, TRUE, 'America/New_York', -285138000 // 19-Dec-1960 00:00:00 UST
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25569, TRUE, 'America/New_York', -18000 // PHP Base Date 01-Jan-1970 00:00:00 UST
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30292, TRUE, 'America/New_York', 408049200 // 07-Dec-1982 00:00:00 UST
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39611, TRUE, 'America/New_York', 1213214400 // 12-Jun-2008 00:00:00 UST
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50424, TRUE, 'America/New_York', 2147454000 // PHP 32-bit Latest Date 19-Jan-2038 00:00:00 UST
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22345.56789, TRUE, 'America/New_York', -278522534 // 18-May-1903 13:37:46 UST
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22345.6789, TRUE, 'America/New_York', -278512943 // 18-Oct-1933 16:17:37 UST
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0.5, TRUE, 'America/New_York', 28800 // 12:00:00 UST
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0.75, TRUE, 'America/New_York', 50400 // 18:00.00 UST
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0.12345, TRUE, 'America/New_York', -3734 // 02:57:46 UST
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41215, TRUE, 'America/New_York', 1351800000 // 02-Nov-2012 00:00:00 UST
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22269, TRUE, 'Pacific/Auckland', -285076800 // 19-Dec-1960 00:00:00 UST
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25569, TRUE, 'Pacific/Auckland', 43200 // PHP Base Date 01-Jan-1970 00:00:00 UST
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30292, TRUE, 'Pacific/Auckland', 408114000 // 07-Dec-1982 00:00:00 UST
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39611, TRUE, 'Pacific/Auckland', 1213272000 // 12-Jun-2008 00:00:00 UST
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50423.5, TRUE, 'Pacific/Auckland', 2147475600 // PHP 32-bit Latest Date 19-Jan-2038 00:00:00 UST
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22345.56789, TRUE, 'Pacific/Auckland', -278461334 // 18-May-1903 13:37:46 UST
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22345.6789, TRUE, 'Pacific/Auckland', -278451743 // 18-Oct-1933 16:17:37 UST
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0.5, TRUE, 'Pacific/Auckland', 90000 // 12:00:00 UST
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0.75, TRUE, 'Pacific/Auckland', 111600 // 18:00.00 UST
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0.12345, TRUE, 'Pacific/Auckland', 57466 // 02:57:46 UST
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41215, TRUE, 'Pacific/Auckland', 1351861200 // 02-Nov-2012 00:00:00 UST
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@ -1,6 +1,6 @@
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"PHPExcel", "8053"
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"Mark Baker", "877D"
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"I<3Am3l1a/*", "E3C8"
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"!+&=()~§±æþ", "C0EA"
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"μυστικό κωδικό πρόσβασης", "FFFF26DD"
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"গোপন পাসওয়ার্ড", "E858"
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"Секретный пароль", "EA5F"
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