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<?php /* * Fill in all five below and click blue 'eval();' button below textarea. * * ------------------ */ $caseNumber = -1; $unhashedServerSeed = ''; $nonce = -1; $clientSeed = ''; $qty = -1; /* ------------------ */ if ($caseNumber < 0 || $unhashedServerSeed == '' || $nonce < 0 || $clientSeed == '' || $qty < 0) { echo "Fill in details"; return; } $unhashedServerSeed = preg_replace( "/\r|\n/", "", $unhashedServerSeed ); $clientSeed = preg_replace( "/\r|\n/", "", $clientSeed ); function stringToInt32($seed) { $groups = str_split((string)$seed, 4); $groups = array_map(function ($g) { return unpack('C*', $g); }, $groups); $groups = array_filter($groups, function ($g) { return count($g) === 4; }); $result = array_map(function ($group) { return array_reduce($group, function ($acc, $cur) { return ($acc << 4) | $cur; }, 0); }, $groups); return array_reduce($result, function ($acc, $cur) { return ($acc ^ $cur); }, 0); } $serverSeedInt = stringToInt32($unhashedServerSeed); $clientSeedInt = stringToInt32($clientSeed); $seed = $serverSeedInt ^ $clientSeedInt ^ (int)$caseNumber ^ (int)$nonce; mt_srand($seed, MT_RAND_MT19937); $result = mt_rand(1, $qty); echo "Seed: $seed\n"; echo "Result: $result";