Re: Re: Unique ID on 5.0.4 (Windows)

From:	Jasper Bryant-Greene	Date:	Thu, 22 Sep 2005 05:35:34 +0000
Subject:	Re: Re: Unique ID on 5.0.4 (Windows)
References:	1 2 3	Groups:	php.general
Request:	Send a blank email to php-general+get-222973@lists.php.net to get a copy of this message

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. -- Jasper Bryant-Greene Freelance web developer http://jasper.bryant-greene.name/