I want a small script that will take a domain name (eg: [url removed, login to view]) in a text field of a form and process it with 2 variables to produce a unique alphanumeric code of (always) 16 characters. Both admin supplied variables will be alphanumeric of varying lengths up to 20 characters and should be set up at the top of the PHP script itself simply as something like $admin_variable_1 = ""%3B $admin_variable_1 = ""%3B The result should be the same every time the script is run with the same combination of domain name and 2 variables. Reversing the process is not expected or wanted, this is simply a device for creating unique codes for customers based on their domain name. A brief explanation of any process or algorhythm would be halpful so I can get an idea of the security level involved. I don't want anything really obvious and easily worked out. The script becomes my property, and it should be PHP4 only and well commented throughout as I may wish to develop it further for my own needs (I'm a programmer myself). I will make payment and provide feedback within 24 hours of receiving correctly functioning scripts as described above. If you do not agree with the payment terms in the above paragraph then do not bother to bid. Good and prompt work will be reqarded with carefully written feedback.