Generate unique random alphanumeric characters that are 7 characters long

Question

It need not be meaningful words - more like random password generation, but the catch is - they should be unique. I will be using this for some kind of package / product cod

Answer 1

Use Kohana text,

http://docs.kohanaphp.com/helpers/text

For example,

   $prod_id = text::random('alpha', 7);

If you don't want use the framework, you can simply copy the code. You will find lots of goodies there.