Comments on: UUID generator for PHP

By: elmimmo

elmimmo — Wed, 11 Jan 2012 10:18:22 +0000

Oops, just to note, I do not get the same UUID v5 with OSSP uuid removing the http:// with either, just like

uuid -v5 6ba7b810-9dad-11d1-80b4-00c04fd430c8 http://www.widgets.com

By: zapytaj

zapytaj — Sun, 25 Dec 2011 04:38:43 +0000

zapytaj…

[...]UUID generator for PHP « shapeshifter.se[...]…

By: phpcassaからTimeUUID使うときにuuid.phpがバグってた件 |

phpcassaからTimeUUID使うときにuuid.phpがバグってた件 | — Mon, 04 Apr 2011 16:26:22 +0000

[...] [...]

By: Lysender

Lysender — Wed, 10 Mar 2010 05:16:21 +0000

I have modified them so that it will convert binary back to string or byte etc

static private function conv_bin2byte($src) {
// array_merge – reindex since unpack starts at index 1
return array_merge(unpack(’C16′, $src));
}

static private function conv_bin2field($src) {
$byte = self::conv_bin2byte($src);
return self::conv_byte2field($byte);
}

static private function conv_bin2string($src) {
$byte = self::conv_bin2byte($src);
return self::conv_byte2string($byte);
}

By: Lysender

Lysender — Wed, 10 Mar 2010 04:44:24 +0000

How do I convert a binary back to string or byte or field?

Uuid::convert($id, Uuid::FMT_BINARY, Uuid::FMT_STRING)

is not yet supported. It is just now that I notice the problem.

By: Universally Unique Identifier (UUID) in PHP und MySQL » Webmaid.de

Universally Unique Identifier (UUID) in PHP und MySQL » Webmaid.de — Thu, 25 Feb 2010 08:45:08 +0000

[...] und als Klasse bereit gestellt. Bei der Suche im Netz habe ich zwei Varianten entdeckt: DrUUID und UUID Generator. Außerdem kann man auch das PECL Package uuid nutzen, welches jedoch die libuuid (des Projekts [...]

By: Gavitron

Gavitron — Thu, 17 Dec 2009 20:58:25 +0000

Actually, after several hours of testing, I have identified a significant bug in this implementation. If you generate a version 3 or 5 UUID, using a namespace UUID with the first byte > 8, your code overflows, and generates invalid UUIDs. further, this invalid UUID is the same for all namespace UUIDs >80000000-0000-0000-0000-00000000000

By: David

David — Tue, 25 Aug 2009 20:33:17 +0000

Thanks for the great class!

One note is that many implementations claim that the example for version 3 as shown in RFC4122 is incorrect (OSSP uuid, python) where the value generated should actually be 3d813cbb-47fb-32ba-91df-831e1593ac29. If one needs compatibility with these (and other) libraries for version 3/5 one can remove lines 163-165 and 180-182 (byte swapping lines) and get matching results.

By: fli

fli — Tue, 07 Jul 2009 14:01:49 +0000

The bugs mentioned in the posts above should have been fixed now.

By: jonovic

jonovic — Wed, 27 May 2009 13:26:35 +0000

I’ve tried on Php 5.2.6 on Windows and fall into trouble with random generation. Time_low part is generated using mt_rand with interval set to 0,0xffffffff. The mt_rand function however uses signed integer for parameter and that’s why the resulting value is always negative. When passing to sprintf the result of time_low part is always 0.