Online PHP editor | vld for NTK79

<?php// EXAMPLE USAGE$array = generate();echo $array[0];echo "<br />";echo $array[1];// FUNCTIONfunction 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(1, 9), 1); //random number $id .= substr($digilist, rand(10, 31), 1); //then a letter $id .= substr($digilist, rand(10, 31), 1); //another letter $id .= substr($digilist, rand(1, 9), 1); //a number $id .= substr($digilist, rand(1, 9), 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;}?>