generationg an UUID

[patuf]

Hi,

Is it possible to generate an UUID (GUID) in PHP?

An unique id like: "BF127074-8A15-4A32-A7B3-BEF9A2DBB65C"




Thanks

[Chris Hope]

patuf wrote:

> Is it possible to generate an UUID (GUID) in PHP?
>
> An unique id like: "BF127074-8A15-4A32-A7B3-BEF9A2DBB65C"

Not as far as I am aware, but it's possible to generate 32 characters using
the md5() function, then uppercase the letters and add the dashes in the
appropriate places to make it look like a Microsoft GUID. If it doesn't
actually need to be a Microsoft type GUID then you don't necessarily need
to do the uppercasing or add in dashes.

Go to [url]http://www.php.net/md5[/url] for more information. Check the user comments
as they contain info about how to generate randomness for the md5 hash.

--
Chris Hope
The Electric Toolbox - [url]http://www.electrictoolbox.com/[/url]

[patuf]

> Not as far as I am aware, but it's possible to generate 32 characters

using

> the md5() function, then uppercase the letters and add the dashes in the
> appropriate places to make it look like a Microsoft GUID. If it doesn't
> actually need to be a Microsoft type GUID then you don't necessarily need
> to do the uppercasing or add in dashes.
>

It doesn't need to be a GUID.

But it has to be UNIQUE... Using md5 doesn't garanty me that it will be
unique right?

Anyway, in my case it only has to be unique *on my system* so I'll use an
easy workaround with date + random number.

But I think it's something missing in PHP to be able to generate a true
UUID...

Thanks

> Go to [url]http://www.php.net/md5[/url] for more information. Check the user comments
> as they contain info about how to generate randomness for the md5 hash.
>
> --
> Chris Hope
> The Electric Toolbox - [url]http://www.electrictoolbox.com/[/url]

[Rob]

"patuf" <fff@sdsd.ca> schreef in bericht news:AH8qc.15546$j6.171@edtnps84...

>

> > Not as far as I am aware, but it's possible to generate 32 characters

> using

> > the md5() function, then uppercase the letters and add the dashes in the
> > appropriate places to make it look like a Microsoft GUID. If it doesn't
> > actually need to be a Microsoft type GUID then you don't necessarily

need

> > to do the uppercasing or add in dashes.
> >

>
> It doesn't need to be a GUID.
>
> But it has to be UNIQUE... Using md5 doesn't garanty me that it will be
> unique right?
>
> Anyway, in my case it only has to be unique *on my system* so I'll use an
> easy workaround with date + random number.
>
> But I think it's something missing in PHP to be able to generate a true
> UUID...
>
> Thanks
>
>
>

> > Go to [url]http://www.php.net/md5[/url] for more information. Check the user

comments

> > as they contain info about how to generate randomness for the md5 hash.
> >
> > --
> > Chris Hope
> > The Electric Toolbox - [url]http://www.electrictoolbox.com/[/url]

>
>

Does the function uniqid() suites your purpose?

[url]http://nl.php.net/manual/nl/function.uniqid.php[/url]


HTH Rob

[Chris Hope]

Rob wrote:

>> But I think it's something missing in PHP to be able to generate a true
>> UUID...

>> > Go to [url]http://www.php.net/md5[/url] for more information. Check the user

> comments

>> > as they contain info about how to generate randomness for the md5 hash.

> Does the function uniqid() suites your purpose?
>
> [url]http://nl.php.net/manual/nl/function.uniqid.php[/url]

Crap. And I'd seen that function before too... probably even used it in my
code somewhere... *sigh*

Note though that it's still based on the current time in microseconds
(according to the manual anyhow) so it is possible (however unlikely) it
may have the same value on another host. In the case of the original poster
this should be OK as he was only wanting a unique value for his host.

--
Chris Hope
The Electric Toolbox - [url]http://www.electrictoolbox.com/[/url]

[patuf]

> Does the function uniqid() suites your purpose?
>
> [url]http://nl.php.net/manual/nl/function.uniqid.php[/url]
>

Oh yeah, that's what I was looking for. I had no luck seraching for "php
uuid" on google...

Thanks!