Nerd Trivia (the question)
Mark Grosberg
<script language="php">
function get_next_record($fd, $kind)
{
for($once = false;; $once = true)
{
$last_ch = "\n";
while (!feof($fd))
{
$ch = fgetc($fd);
if (($last_ch == "\n") && ($ch == "~"))
{
if (feof($fd))
die("Invalid tag specifier.");
$next_ch = fgetc($fd);
if ($next_ch == $kind)
return;
$ch = $next_ch;
}
$last_ch = $ch;
}
// Whoops, hit EOF, back up.
if ($once)
die("Internal error.");
rewind($fd);
}
}
function read_until($fd, $term)
{
$result = "";
while ($s = fgets($fd, 4096))
{
if ($s == ($term . "\n"))
break;
$result = $result . $s;
}
return ($result);
}
// Location of the database file.
$trivia_file = "/app/httpd/run/sites/www.conman.org/htdocs/projects"
. "/nerd_trivia/trivia.dat";
// Initialize the random number generator.
srand((double )microtime() * 1000.66 + getmypid());
// Open the trivia file.
$fd = fopen($trivia_file, "r");
if (!$fd)
die("Can't open trivial file.");
// Now, seek to a random spot in the file.
$pos_frac = (double )rand()
/ (double )getrandmax();
$pos = round($pos_frac * (double )filesize($trivia_file));
if (fseek($fd, $pos) != 0)
die("Seek error.");
// Align to a record boundary.
get_next_record($fd, 'Q');
$trivia_loc = ftell($fd) ^ 0x31ee4f;
$trivia = read_until($fd, "~A");
$answer = ftell($fd) ^ 0xf0a5b1;
fclose($fd);
</script>
Question:
<?php echo("$trivia"); ?>
