Subversion Repositories uuid_mac_utils

        // START: HickelSOFT UUID

        // Block 5

        $signature = substr($uuid,20,12);

        if (strtolower($signature) == '4849434b454c'/*HICKEL*/) {

                // HickelSOFT "SQL Server sortable UUID in C#"

                // Version 2: Resolution of 1 milliseconds, random part of 18 bits, UTC time, UUIDv8 conform.

                // Example: 2088dc33-000d-8045-87e8-4849434b454c

                // Block 4

                $rnd2bits = hexdec(substr($uuid,16,1)) & 0x3;

                $year = hexdec(substr($uuid,17,3));

                // Block 3

                $dayOfYear = hexdec(substr($uuid,13,3));

                $day = intval(getDateFromDay($year, $dayOfYear)->format('d'));

                $month = intval(getDateFromDay($year, $dayOfYear)->format('m'));

                // Block 2

                $minuteOfDay = hexdec(substr($uuid,8,4));

                $minutes = $minuteOfDay % 60;

                $hours = (int)floor($minuteOfDay / 60);

                // Block 1

                $rnd16bits = substr($uuid,0,4);

                $millisecond8bits = hexdec(substr($uuid,4,2));

                $milliseconds = round($millisecond8bits / 255 * 999);

                $seconds = hexdec(substr($uuid,6,2));

                // Verbose info

                echo "\n<u>Interpretation of <a href=\"https://gist.github.com/danielmarschall/7fafd270a3bc107d38e8449ce7420c25\">HickelSOFT \"SQL Server Sortable Custom UUID\", Version 2</a></u>\n\n";

                echo sprintf("%-32s %s\n", "Random 16 bits:", "[0x$rnd16bits] 0b".str_pad("".base_convert($rnd16bits, 16, 2), 16, '0', STR_PAD_LEFT));

                echo sprintf("%-32s %s\n", "Milliseconds:", "[0x".substr($uuid,4,2)."] $milliseconds");

                echo sprintf("%-32s %s\n", "Seconds:", "[0x".substr($uuid,6,2)."] $seconds");

                echo sprintf("%-32s %s\n", "Minute of day:", "[0x".substr($uuid,8,4)."] $minuteOfDay (".str_pad("$hours",2,'0',STR_PAD_LEFT).":".str_pad("$minutes",2,'0',STR_PAD_LEFT).")");

                echo sprintf("%-32s %s\n", "Day of year:", "[0x".substr($uuid,13,3)."] $dayOfYear (Day=$day, Month=$month)");

                echo sprintf("%-32s %s\n", "Random 2 bits:", "[$rnd2bits] 0b".str_pad("".base_convert("$rnd2bits", 16, 2), 2, '0', STR_PAD_LEFT));

                echo sprintf("%-32s %s\n", "Year:", "[0x".substr($uuid,17,3)."] $year)");

                echo sprintf("%-32s %s\n", "Signature:", "[0x".substr($uuid,20,12)."] HICKEL");

                echo sprintf("%-32s %s\n", "UTC Date Time:",

                        str_pad("$year",4,'0',STR_PAD_LEFT).'-'.

                        str_pad("$month",2,'0',STR_PAD_LEFT).'-'.

                        str_pad("$day",2,'0',STR_PAD_LEFT).' '.

                        str_pad("$hours",2,'0',STR_PAD_LEFT).':'.

                        str_pad("$minutes",2,'0',STR_PAD_LEFT).':'.

                        str_pad("$seconds",2,'0',STR_PAD_LEFT)."'".

                        str_pad("$milliseconds",2,'0',STR_PAD_LEFT)

                );

                echo sprintf("%-32s %s\n", "Implementation:", "https://gist.github.com/danielmarschall/7fafd270a3bc107d38e8449ce7420c25");

        } else if (strtolower($signature) == '000000000000') {

                // HickelSOFT "SQL Server sortable UUID in C#"

                // Version 1: Resolution of 1 milliseconds, random part of 16 bits, local timezone, NOT UUIDv8 conform.

                // Example: ff38da51-1301-0903-2420-000000000000

                // Block 4

                $year = substr($uuid,18,2) . substr($uuid,16,2);

                if (!is_numeric($year) || ($year < 2000) || ($year > 2999)) $year = 'XXXX'; else $year = intval($year);

                // Block 3

                $day = substr($uuid,12,2);

                if (!is_numeric($day) || ($day < 0) || ($day >= 60)) $day = 'XX'; else $day = intval($day);

                $month = substr($uuid,14,2);

                if (!is_numeric($month) || ($month < 0) || ($month >= 60)) $month = 'XX'; else $month = intval($month);

                // Block 2

                $minutes = substr($uuid,8,2);

                if (!is_numeric($minutes) || ($minutes < 0) || ($minutes >= 60)) $minutes = 'XX'; else $minutes = intval($minutes);

                $hours = substr($uuid,10,2);

                if (!is_numeric($hours) || ($hours < 0) || ($hours >= 60)) $hours = 'XX'; else $hours = intval($hours);

                // Block 1

                $rnd16bits = substr($uuid,0,4);

                $millisecond8bits = hexdec(substr($uuid,4,2));

                $milliseconds = round($millisecond8bits / 255 * 999);

                $seconds = substr($uuid,6,2);

                if (!is_numeric($seconds) || ($seconds < 0) || ($seconds >= 60)) $seconds = 'XX'; else $seconds = intval($seconds);

                // Verbose info

                echo "\n<u>Interpretation of <a href=\"https://gist.github.com/danielmarschall/7fafd270a3bc107d38e8449ce7420c25\">HickelSOFT \"SQL Server Sortable Custom UUID\", Version 1</a></u>\n\n";

                echo sprintf("%-32s %s\n", "Random 16 bits:", "[0x$rnd16bits] 0b".str_pad(base_convert($rnd16bits, 16, 2), 16, '0', STR_PAD_LEFT));

                echo sprintf("%-32s %s\n", "Milliseconds:", "[0x".substr($uuid,4,2)."] $milliseconds");

                echo sprintf("%-32s %s\n", "Seconds:", "[0x".substr($uuid,6,2)."] $seconds");

                echo sprintf("%-32s %s\n", "Minutes:", "[0x".substr($uuid,8,2)."] $minutes");

                echo sprintf("%-32s %s\n", "Hours:", "[0x".substr($uuid,10,2)."] $hours");

                echo sprintf("%-32s %s\n", "Day:", "[0x".substr($uuid,12,2)."] $day");

                echo sprintf("%-32s %s\n", "Month:", "[0x".substr($uuid,14,2)."] $month");

                echo sprintf("%-32s %s\n", "Year:", "[0x".substr($uuid,16,4)."] $year");

                echo sprintf("%-32s %s\n", "Signature:", "[0x".substr($uuid,20,12)."]");

                echo sprintf("%-32s %s\n", "Generator's Local Date Time:",

                        str_pad("$year",4,'0',STR_PAD_LEFT).'-'.

                        str_pad("$month",2,'0',STR_PAD_LEFT).'-'.

                        str_pad("$day",2,'0',STR_PAD_LEFT).' '.

                        str_pad("$hours",2,'0',STR_PAD_LEFT).':'.

                        str_pad("$minutes",2,'0',STR_PAD_LEFT).':'.

                        str_pad("$seconds",2,'0',STR_PAD_LEFT)."'".

                        str_pad("$milliseconds",2,'0',STR_PAD_LEFT)

                );

                echo sprintf("%-32s %s\n", "Implementation:", "https://gist.github.com/danielmarschall/7fafd270a3bc107d38e8449ce7420c25");

        }

        // END: HickelSOFT UUID

/**

 * Converts the day of year of a year into a DateTime object

 * @param int $year The year

 * @param int $dayOfYear The day of year (value 1 till 365 or 1 till 366 for leap years)

 * @return \DateTime The resulting date

 */

function getDateFromDay(int $year, int $dayOfYear): \DateTime {

        // Note: "Y z" and "z Y" make a difference for leap years (last tested with PHP 8.0.3)

        $date = \DateTime::createFromFormat('Y z', strval($year) . ' ' . strval($dayOfYear-1));

        return $date;

}