Add generation of uuid V4

[ktom]

Hello,

In Faker there is support for uuids but only version 3. Would you consider adding support for V4 as well ?

There was a PR in the old repo fzaninotto#1536

https://github.com/symfony/polyfill-uuid/blob/main/Uuid.php could be relevant here and could also be used to generate the other versions

I can make a PR if you're up for the change

[pimjansen]

Well im open for it but adding another lib to implement all this crypto stuff is a bit overkill imo.

For 2.0 we improve the way we use extensions so i guess the best way there would be to create an extension that has a dependency on the ramsey uuid lib. We do not want this from core point of view but duplicating stuff again is also not right.

[ktom]

Thank you for the feedback
ramsey uuid seems the way to go indeed.

I've also found some quite simple scripts here and there, like in the PHP doc but i don't know how reliable they are and if the mt_rand usage would fit with faker

public static function v4() {
    return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',

      // 32 bits for "time_low"
      mt_rand(0, 0xffff), mt_rand(0, 0xffff),

      // 16 bits for "time_mid"
      mt_rand(0, 0xffff),

      // 16 bits for "time_hi_and_version",
      // four most significant bits holds version number 4
      mt_rand(0, 0x0fff) | 0x4000,

      // 16 bits, 8 bits for "clk_seq_hi_res",
      // 8 bits for "clk_seq_low",
      // two most significant bits holds zero and one for variant DCE1.1
      mt_rand(0, 0x3fff) | 0x8000,

      // 48 bits for "node"
      mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
    );
  }

I can also easily build a small provider for my app for the moment

[pimjansen]

Indeed. Lets stick with this approach since if you look at the total installs and stars and such this is the way to go. Its a simple lib and atleast we know that they are valid at that point (crypto stuff)

I will note it down for a possible extension for v2 though!

[ktom]

Lets stick with this approach

Sorry i'm not sure i got your point here: did you mean add a simple function in v1 or build my own ?

[pimjansen]

Add your own for now.