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Directory >> /var/www/html/back/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/

File / Folder	Size	Action
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Escher	--	ren
OLE	--	ren
Trend	--	ren
CodePage.php	4.575KB	edt ren
Date.php	18.813KB	edt ren
Drawing.php	4.869KB	edt ren
Escher.php	1.136KB	edt ren
File.php	6.003KB	edt ren
Font.php	24.052KB	edt ren
IntOrFloat.php	0.433KB	edt ren
OLE.php	17.472KB	edt ren
OLERead.php	10.206KB	edt ren
PasswordHasher.php	3.918KB	edt ren
StringHelper.php	23.108KB	edt ren
TimeZone.php	2.144KB	edt ren
XMLWriter.php	2.542KB	edt ren
Xls.php	11.495KB	edt ren

<?php

namespace PhpOffice\PhpSpreadsheet\Shared;

use DateTimeZone;
use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;

class TimeZone
{
    /**
     * Default Timezone used for date/time conversions.
     *
     * @var string
     */
    protected static $timezone = 'UTC';

/**
     * Validate a Timezone name.
     *
     * @param string $timezoneName Time zone (e.g. 'Europe/London')
     *
     * @return bool Success or failure
     */
    private static function validateTimeZone(string $timezoneName): bool
    {
        return in_array($timezoneName, DateTimeZone::listIdentifiers(DateTimeZone::ALL_WITH_BC), true);
    }

/**
     * Set the Default Timezone used for date/time conversions.
     *
     * @param string $timezoneName Time zone (e.g. 'Europe/London')
     *
     * @return bool Success or failure
     */
    public static function setTimeZone(string $timezoneName): bool
    {
        if (self::validateTimeZone($timezoneName)) {
            self::$timezone = $timezoneName;

return true;
        }

return false;
    }

/**
     * Return the Default Timezone used for date/time conversions.
     *
     * @return string Timezone (e.g. 'Europe/London')
     */
    public static function getTimeZone(): string
    {
        return self::$timezone;
    }

/**
     *    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 $timezoneName The timezone for finding the adjustment to UST
     * @param float|int $timestamp PHP date/time value
     *
     * @return int Number of seconds for timezone adjustment
     */
    public static function getTimeZoneAdjustment(?string $timezoneName, $timestamp): int
    {
        $timezoneName = $timezoneName ?? self::$timezone;
        $dtobj = Date::dateTimeFromTimestamp("$timestamp");
        if (!self::validateTimeZone($timezoneName)) {
            throw new PhpSpreadsheetException("Invalid timezone $timezoneName");
        }
        $dtobj->setTimeZone(new DateTimeZone($timezoneName));

return $dtobj->getOffset();
    }
}