Ok, thanks but how can i create serial number that nobody can guess it. for example when i use sha1() every body can examine it too! and so they can create it themselves! what strategy is useful to protect license? I think it is better to add a specific hidden string to request code, instead of user name that is known for a probable jobber user. what do you think about it? On Mon, Nov 9, 2009 at 3:09 PM, John Black <spam@xxxxxxxxxxxxxxxxxxxxxxxx>wrote: > Ali Asghar Toraby Parizy wrote: > >> hi friends >> I need a hash function to build a Unique serial number by mixing a request >> code and a user name >> request codes are strings like this: They are literally HEX codes of MAC >> mac >> addresses. >> >> "002314EFD000544AB05345300045675609782123C3254B312123D12312EE13123F123D123123E00000000E00000000E0000000E0000000E0000000E00000000E00000000" >> i want to create a function that mix together this request code with user >> name that user entered and create new serial number. >> What implications i have to satisfy to create such hash function in php? >> Thanks for any suggestion >> > > How about using sha1 to hash your string. If the data is unique then the > hash will be unique as well. > > $string = $request_code.$user_name; > $hash = sha1($string); > > -- > John > Jeder hat soviel Recht, wie er Macht hat. > [Spinoza] > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >
