Databases aren't obsolete just because your app can get away with storing some info in a flat text file.
If you personally don't need that standard, then it's not useful for you, and never has been.
There's a reason why UUIDs are a standard, and what that standard isn't "slam 16 random bytes together and go home". This algorithm generates a random 128-bit number, which is then formatted as a string of hexadecimal characters in a specific format (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).
Uuid generator php software#
So sure, it'd be accurate to say "in many cases you can just do bin2hex(random_bytes(16)) to get a kinda UUID-ish string instead of generating a proper v4 UUID". A random UUID generator is an online software tool that generates universally unique identifiers using a variant of the random algorithm specified in RFC 4122. 27 level 2 deleted 4y If you just need a unique ID, use bin2hex (randombytes (16)).
If you explicitly need to interoperate with UUIDs or are likely to need in the future, use UUIDs. It's simple and strictly better than UUIDv4. (Although if so, I think you may want to rethink some bits of your design!) level 1 nikic 4y Internals JetBrains Guidelines: If you just need a unique ID, use bin2hex (randombytes (16)). Otherwise you can require lib/Uuid.php directly.
Uuid generator php code#
If you are using composer, make sure you require vendor/autoload.php, then the code should Just Work. Q&A What is UUID v4 U niversally U nique ID entifiers transcend many constraints of traditional incremental integer IDs, especially in distributed systems. Generate RFC-4122 compliant random UUIDs with better statistical dispersion than mtrand(), and 5x faster than createuuid(). While UUIDs already have well defined standards, they suffer from quite bad performance when used as a primary key in DBMS. v3uuid UUID :: v3 ( '1546058f-5a25-4334-85ae-e68f2a44bbaf', 'SomeRandomString' ) v5uuid UUID :: v5 ( '1546058f-5a25-4334-85ae-e68f2a44bbaf', 'SomeRandomString' ) // Pseudo-random UUID v4uuid UUID :: v4 () > Raw UUID. Features Very fast Pure PHP implementation Cryptographically secure PRNG Performance Surprisingly, this library is 5x faster than the PECL UUID extension. SoUuid is a working proposal to generate ordered UUIDs in a simple and efficient way using PHP. And as a bonus, maybe those extra 6 bits of entropy are somehow critical to your application. Pure PHP UUID generator Raw demo.php
Uuid generator php mac#
8.9.x core/lib/Drupal/Component/Uuid/Php.php \Drupal\Component\Uuid\Php::generate() A Version 1 UUID is a universally unique identifier that is generated using a timestamp and the MAC address of the computer on which it was generated.The exact number of possibilities is about ²¹². While UUIDs already have well defined standards, they suffer from quite bad performance when used as a primary key in DBMS. Output: 3b0018c3-f273-5889-88e7-8c66a8720e99 7e506c50-b7fc-5180-9f9f-2bf28fdd946d Furthur more to generate UUIDs, there are a few libraries provided out there like Ramsey/uuid and Lootils/uuid, which can be used on convenience. There’s still a chance that a UUID could be duplicated but it’s tiny because of the high number of possible combinations. SoUuid is a working proposal to generate ordered UUIDs in a simple and efficient way using PHP. 1 Answer Sorted by: 8 You can use this: It uses random bytes and puts them in the right positions by using the vsprintf function. A Version 1 UUID is a universally unique identifier that is generated using a timestamp and the MAC address of the computer on which it was generated. Every bit of the string is totally randomly generated. Same name and namespace in other branches This version uses a pseudo-random number generator to generate the UUID.
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