Re: Re: Unique ID on 5.0.4 (Windows)

From:	Chris	Date:	Thu, 22 Sep 2005 14:58:02 +0000
Subject:	Re: Re: Unique ID on 5.0.4 (Windows)
References:	1 2 3 4	Groups:	php.general
Request:	Send a blank email to php-general+get-222983@lists.php.net to get a copy of this message

Jasper Bryant-Greene wrote:

Chris wrote:
David Robley wrote:
Chris wrote:
Pretty soon I'm going to be needing to generate a unique identifier in a script. I'm looking into how to go about doing it now.
Have you looked at uniqid() ? http://php.net/uniqid
If two requests generate and ID at the same microsecond then the ID will duplicate, and that will not work for me.
$unique_id = sha1( uniqid( mt_rand(), true ) ); That unique ID will be based on the current time in microseconds prefixed by a random number generated by the Mersenne Twister. That is *extremely* unlikely to duplicate, even at the same microsecond. Ok, thanks, That looks like it will work for me.

Any particular reason why you used sha1() in there? Thanks alot, Chris