function Mersenne_Shuffle($arr, $seed = -1)
{
if ($seed == -1) {
return $arr;
}
$mt = new Mersenne_Twister($seed);
$new = $arr;
for ($i = count($new) - 1; $i > 0; $i--) {
$j = $mt->getNext(0, $i);
$tmp = $new[$i];
$new[$i] = $new[$j];
$new[$j] = $tmp;
}
return $new;
}
<?php
require_once "Mersenne_Twister.php";
use Tsugi\Core\LTIX;
use Tsugi\Util\LTI;
require_once "names.php";
// Compute the stuff for the output
$code = $USER->id + $LINK->id + $CONTEXT->id;
$MT = new Mersenne_Twister($code);
$my_names = array();
$my_age = array();
$howmany = $MT->getNext(4, 6);
for ($i = 0; $i < $howmany; $i++) {
$name = $names[$MT->getNext(0, count($names))];
$age = $MT->getNext(13, 40);
$sha = sha1($name . $age);
$database[] = array($sha, $name, $age);
}
$sorted = $database;
sort($sorted);
$goodsha = $sorted[0][0];
$oldgrade = $RESULT->grade;
if (isset($_POST['sha1'])) {
if ($_POST['sha1'] != $goodsha) {
$_SESSION['error'] = "Your code did not match";
header('Location: ' . addSession('index.php'));
return;
}
$gradetosend = 1.0;
$scorestr = "Your answer is correct, score saved.";
if ($dueDate->penalty > 0) {
