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Possible Duplicate:
PHP: How to generate a random, unique, alphanumeric string?
I wish to generate Product Keys or Licenses using PHP. Is there a function that allow me to do generate unique numbers/IDs but at the same time make sure that there won’t be a chance for duplicate?
Thank you.
You could use php’s uniqid function to generate id’s:
http://www.php.net/manual/en/function.uniqid.php
or leave that responsibility to the database engine, which will generate auto-incremented id values.