OwlCyberSecurity - MANAGER
Edit File: DateTimeConverter.php
<?php namespace PhpZip\Util; /** * Convert unix timestamp values to DOS date/time values and vice versa. * * The DOS date/time format is a bitmask: * * 24 16 8 0 * +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ * |Y|Y|Y|Y|Y|Y|Y|M| |M|M|M|D|D|D|D|D| |h|h|h|h|h|m|m|m| |m|m|m|s|s|s|s|s| * +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ * \___________/\________/\_________/ \________/\____________/\_________/ * year month day hour minute second * * The year is stored as an offset from 1980. * Seconds are stored in two-second increments. * (So if the "second" value is 15, it actually represents 30 seconds.) * * @see https://docs.microsoft.com/ru-ru/windows/win32/api/winbase/nf-winbase-filetimetodosdatetime?redirectedfrom=MSDN * * @author Ne-Lexa alexey@nelexa.ru * @license MIT * * @internal */ class DateTimeConverter { /** * Smallest supported DOS date/time value in a ZIP file, * which is January 1st, 1980 AD 00:00:00 local time. */ const MIN_DOS_TIME = 0x210000; // (1 << 21) | (1 << 16) /** * Largest supported DOS date/time value in a ZIP file, * which is December 31st, 2107 AD 23:59:58 local time. */ const MAX_DOS_TIME = 0xff9fbf7d; // ((2107 - 1980) << 25) | (12 << 21) | (31 << 16) | (23 << 11) | (59 << 5) | (58 >> 1); /** * Convert a 32 bit integer DOS date/time value to a UNIX timestamp value. * * @param int $dosTime Dos date/time * * @return int Unix timestamp */ public static function msDosToUnix($dosTime) { if ($dosTime <= self::MIN_DOS_TIME) { $dosTime = 0; } elseif ($dosTime > self::MAX_DOS_TIME) { $dosTime = self::MAX_DOS_TIME; } // date_default_timezone_set('UTC'); return mktime( (($dosTime >> 11) & 0x1f), // hours (($dosTime >> 5) & 0x3f), // minutes (($dosTime << 1) & 0x3e), // seconds (($dosTime >> 21) & 0x0f), // month (($dosTime >> 16) & 0x1f), // day ((($dosTime >> 25) & 0x7f) + 1980) // year ); } /** * Converts a UNIX timestamp value to a DOS date/time value. * * @param int $unixTimestamp the number of seconds since midnight, January 1st, * 1970 AD UTC * * @return int a DOS date/time value reflecting the local time zone and * rounded down to even seconds * and is in between DateTimeConverter::MIN_DOS_TIME and DateTimeConverter::MAX_DOS_TIME */ public static function unixToMsDos($unixTimestamp) { if ($unixTimestamp < 0) { throw new \InvalidArgumentException('Negative unix timestamp: ' . $unixTimestamp); } $date = getdate($unixTimestamp); $dosTime = ( (($date['year'] - 1980) << 25) | ($date['mon'] << 21) | ($date['mday'] << 16) | ($date['hours'] << 11) | ($date['minutes'] << 5) | ($date['seconds'] >> 1) ); if ($dosTime <= self::MIN_DOS_TIME) { $dosTime = 0; } return $dosTime; } }