random strings

[Noiz Pollution]

hi folks,

i'm looking to create a random string consisting of 11 characters (alphanumeric) to create a unique identifier for an email wine voucher so people can claim a free bottle of wine with it and only be able to use it once

anybody got any ideas how i'd go about generating this string?


cheers,
Robert

[CeleronXT]

$randomstring = substr(md5(microtime()), 0, 11);
Would this do it?

It can generate the same two random strings if two people access it within the same millisecond, but other than that it should be pretty random.

[Noiz Pollution]

celeron that's exactly what i'm looking for :D

much appreciated,
Robert