dakomeah Posted October 18, 2010 Share Posted October 18, 2010 Hi Everybody, Pls i would like to develop an algorithm to generate pin codes which will be used for making scratch cards for commercializing certain services on a website. I would like to know if there is any material anywhere, that i can read to guide me, or anyone who has handled such a project before can put me in the right direction. The specifications are. It must be a 14 digit code, Generated Non sequentially, However there much be a way of validating it, as different pin codes will be generated for different regions, such that a pin code bought in one region can only be used in making queries about only that region, and not any other. Thank you Link to comment https://forums.phpfreaks.com/topic/216144-unique-pin-codes-for-scratch-cards/ Share on other sites More sharing options...
upp Posted November 19, 2010 Share Posted November 19, 2010 you could generate random numbers between certain values for certain regions. example region a will have numbers between 10000000000000 and 19999999999999, region b will have a random number between 20000000000000 and 29999999999999, and so on.... then you could apply a switch and figure out what region they are in. example: $region = "north"; // put the region of the user here switch($region){ case "north": $pin = rand(10000000000000, 19999999999999); break; case "south": $pin = rand(20000000000000, 29999999999999); break; } switch($pin){ case ($pin >= 10000000000000 && $pin <= 19999999999999): echo "you are in the north"; break; case ($pin >= 20000000000000 && $pin <= 29999999999999): echo "you are in the south"; break; } Link to comment https://forums.phpfreaks.com/topic/216144-unique-pin-codes-for-scratch-cards/#findComment-1136618 Share on other sites More sharing options...
Wildbug Posted November 19, 2010 Share Posted November 19, 2010 Credit card companies use the Luhn algorithm. I know different companies start their numbers with different prefixes, so you could adapt something similar to attach codes to regions. Link to comment https://forums.phpfreaks.com/topic/216144-unique-pin-codes-for-scratch-cards/#findComment-1136941 Share on other sites More sharing options...
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