Unique key generation

Question

I looking for a way, specifically in PHP that I will be guaranteed to always get a unique key.

I have done the following:

strtolower(substr(crypt(tim         


        

Answer 1

Without writing the code, my logic would be:

Generate a random string from whatever acceptable characters you like.
Then add half the date stamp (partial seconds and all) to the front and the other half to the end (or somewhere in the middle if you prefer).

Stay JOLLY!
H