Description Generate UUIDS1 and ULIDS2 Syntax use Symfony\Component\Uid\Uuid; use Symfony\Component\Uid\Ulid; // generating a random UUID type 4 (all UUID types are supported) $uuid = Uuid::v4(); // generating a UUID Type 6 (which is not part of the standard, but it's // supported by the component because it's popular enough) $uuid = Uuid::v6(); // generating a ULID (there's only one type of them) $ulid = new Ulid(); // checking if some UUID is null use Symfony\Component\Uid\NilUuid; if ($uuid instanceof NilUuid) { // ... } // comparing UUIDs $uuid1 = Uuid::v1(); $uuid4 = Uuid::v4(); $uuid1->equals($uuid4); // false // converting to different formats $ulid = Ulid::fromString('01E439TP9XJZ9RPFH3T1PYBCR8'); $ulid->toBinary(); // string(16) "..." (binary contents can't be printed) $ulid->toBase32(); // string(26) "01E439TP9XJZ9RPFH3T1PYBCR8" $ulid->toBase58(); // string(22) "1BKocMc5BnrVcuq2ti4Eqm" $ulid->toRfc4122(); // string(36) "0171069d-593d-97d3-8b3e-23d06de5b308" Normalization UUID Normalizer Footnotes Footnotes https://en.wikipedia.org/wiki/Universally_unique_identifier ↩ https://github.com/ulid/spec ↩