当前路径:vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/TimeZone.php <?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 $timezone Time zone (e.g. 'Europe/London') * * @return bool Success or failure */ private static function validateTimeZone($timezone) { return in_array($timezone, DateTimeZone::listIdentifiers(DateTimeZone::ALL_WITH_BC)); } /** * Set the Default Timezone used for date/time conversions. * * @param string $timezone Time zone (e.g. 'Europe/London') * * @return bool Success or failure */ public static function setTimeZone($timezone) { if (self::validateTimezone($timezone)) { self::$timezone = $timezone; return true; } return false; } /** * Return the Default Timezone used for date/time conversions. * * @return string Timezone (e.g. 'Europe/London') */ public static function getTimeZone() { return self::$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 $timezone The timezone for finding the adjustment to UST * @param int $timestamp PHP date/time value * * @return int Number of seconds for timezone adjustment */ public static function getTimeZoneAdjustment($timezone, $timestamp) { if ($timezone !== null) { if (!self::validateTimezone($timezone)) { throw new PhpSpreadsheetException('Invalid timezone ' . $timezone); } } else { $timezone = self::$timezone; } $objTimezone = new DateTimeZone($timezone); $transitions = $objTimezone->getTransitions($timestamp, $timestamp); return (count($transitions) > 0) ? $transitions[0]['offset'] : 0; } }
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51Aspx.com 版权所有 CopyRight © 2006-2022. 京ICP备09089570号 | 京公网安备11010702000869号