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run code in 200+ php & hhvm versions
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<?php // EXAMPLE USAGE $array = generate(); echo $array[0]; echo "<br />"; echo $array[1]; // FUNCTION function generate() { $digilist = "0123456789ABCDEFGHJKLMNPQRTUVWXY"; //now we generate a new random ID number using the substrings of the digitList string above $id = NULL; $id .= substr($digilist, rand(9, 9), 1); //random number $id .= substr($digilist, rand(21, 21), 1); //then a letter $id .= substr($digilist, rand(14, 14), 1); //another letter $id .= substr($digilist, rand(2, 9), 1); //a number $id .= substr($digilist, rand(3, 3), 1); //and finally another number - simple :D //ok so now we need to generate an MD5 hash of our ID $hash = md5($id); //cycle through the hash 16 (length of key) times (in steps of 2 because each hex bytes is 2 digits long) $i = 0; $key = NULL; for ($i; $i < 32; $i+=2) { //here we convert the next hex value to an integer and perform a bitwise AND operation against '31' //31 is the highest substring value in our digit list. $nextdigit = hexdec(substr($hash, $i, 2)) & 31; //if 'i' is divisable by 8 (every 4 cycles) then we want to add "-" if ((($i % 8) == 0) && ($i > 0)) { $key .= "-".substr($digilist, $nextdigit, 1); } else { $key .= substr($digilist, $nextdigit, 1); } } $array = array($id, $key); //return return $array; } ?>
based on XKmOt
Output for 5.6.4, 5.6.8, 5.6.25, 7.0.8 - 7.0.11, 7.2.6
9ME43<br />R76Q-KJXF-QUQ6-K3Y4
Output for 5.6.11 - 5.6.12, 5.6.15, 5.6.20, 5.6.22, 5.6.26, 7.0.4, 7.0.20, 7.2.0
9ME83<br />1F0R-81BX-TVEY-WA92
Output for 7.0.6, 7.0.12, 7.1.0, 7.1.2, 7.1.5, 7.1.10
9ME93<br />7J8K-C920-1Q55-P278
Output for 5.6.1 - 5.6.2, 5.6.6, 5.6.10, 5.6.18, 5.6.28, 7.0.1, 7.0.16 - 7.0.17, 7.1.7
9ME33<br />VN4M-9HWT-NPWD-GYQH
Output for 5.6.7, 5.6.14, 5.6.23, 5.6.29, 7.0.0, 7.0.13 - 7.0.15, 7.1.3, 7.1.6
9ME73<br />MFRW-3L80-JGUD-BLBE
Output for 5.6.5, 5.6.9, 5.6.13, 5.6.17, hhvm-3.15.4, 7.0.5, 7.1.4
9ME23<br />MFQB-VMJX-A71C-DWXV
Output for 5.6.0, 5.6.3, 5.6.19, 5.6.21, 5.6.27, 7.0.2, 7.0.18 - 7.0.19, 7.1.1
9ME63<br />J8H8-3DRA-HBKQ-G14L
Output for 5.6.16, 5.6.24, 5.6.30, 7.0.3, 7.0.7
9ME53<br />65K2-J4KR-MN30-4TCR