README

UUID <=> ULID bidirectional converter

Installing

composer require mpyw/uuid-ulid-converter

API

public static Converter::uuidToUlid(string $uuid, bool $lowercase = false): string
public static Converter::ulidToUuid(string $ulid, bool $uppercase = false): string

Important

UUID is lowercase by default, whereas ULID is uppercase by default.

Usage

Basic

use Mpyw\UuidUlidConverter\Converter;

var_dump(Converter::ulidToUuid('61862H2EWP9TCTRX3MJ15XNY7X'));
// string(36) "c1418511-3b96-4e99-ac74-74904bdaf8fd"

var_dump(Converter::uuidToUlid('c1418511-3b96-4e99-ac74-74904bdaf8fd'));
// string(26) "61862H2EWP9TCTRX3MJ15XNY7X"

Advanced

The following workarounds are particularly useful in the PostgreSQL, which does not support ULID but does support UUID. Storing ULID as native UUID is more efficient than storing original ULID as strings.

Introduce advanced usages with robinvdvleuten/php-ulid.

Generate UUID-styled ULID

use Mpyw\UuidUlidConverter\Converter;
use Ulid\Ulid;

// Use generated UUID as primary key
$uuid = Converter::ulidToUuid((string)Ulid::generate());

Timestamp range of UUID-styled ULID

use Mpyw\UuidUlidConverter\Converter;
use Ulid\Ulid;

$dates = [
    new \DateTimeImmutable('2020-01-01 00:00:00.000 UTC'),
    new \DateTimeImmutable('2020-01-02 00:00:00.000 UTC'),
];

function createUuidRange(array $dates): array
{
    $createPart = fn (\DateTimeInterface $date, bool $isEnd) => Converter::ulidToUuid(
        Ulid::fromTimestamp(round((int)$date->format('Uu') / 1000))->getTime()
        . str_repeat($isEnd ? 'Z' : '0', 16),
    );
    return [
        $createPart($dates[0], false),
        $createPart($dates[1], true),
    ];
}

$uuids = createUuidRange($dates);
/*
array(2) {
  [0]=>
  string(36) "016f5e66-e800-0000-0000-000000000000"
  [1]=>
  string(36) "016f638d-4400-ffff-ffff-ffffffffffff"
}
*/