Re: [PHP-DB] Generating random numbers

TG wrote:
> Is the most important thing to be random or to be unique?   If you need 
> unique, you can use a timestamp including microseconds. Maybe using 
> something like microtime():
> http://us.php.net/manual/en/function.microtime.php
> 
> The only other way you're probably going to guarentee that you don't repeat 
> numbers is to keep a list of what's been used and compare against it.  
> Otherwise, there's always going to be a slim chance you'll repeat a number.
> 
> What do you plan on using it for?  Maybe someone can give a better 
> recommendation for what you need.   And will this number be generated by 
> PHP or the database?  Or can it be either?

There's also http://au.php.net/uniqid - you could even use a different 
prefix for each call.

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