help with random code generation

[debuitls]

Hi,

I'm trying to generate a random reference code for an auction style website.

Currently I'm using the following which generates a random ten character code.

*This is not my code i found it elsewhere on the net.

$random = substr(base64_encode(rand(1000000,9999999)),0,7);

This is fine but what I really need is do is add 'DAD' before each random seven character code.

So in other words my reference code would be ten characters long
ie
DAD1234567

Just wondering if anybody had any suggestions off the top of their heads.

Many Thanks!

[debuitls]

Just figured it out

$random = 'DAD' . substr(base64_encode(rand(1000000,9999999)),0,7);

Cheers

[NogDog]

I don't know if this is an issue for what you are doing or not, but note that rand() only promises to generate a (pseudo) random number. It is not necessarily unique, so there is always a possibility that any value it generates will be a duplicate of a previously generated one. If this is an issue, you might look into using uniqid().

$random = "DDD" . md5(uniqid('')); 

[debuitls]

Hi Nog Dog,

Thanks for pointing this out to me.

I changed it and it worked fine.

Thanks for your help again.