function mnemonic($chars, $numbers)
{
$letters = array(0 => array('q', 'w', 'r', 'g', 'f', 'd', 's', 'z', 'x', 'c', 'v'), 1 => array('u', 'i', 'o'), 2 => array('y', 'p', 'h', 'j', 'k', 'l', 'b', 'n', 'm'), 3 => array('e', 'a'));
$digits = array(0 => array('1', '2', '3', '4', '5', '6'), 1 => array('7', '8', '9', '0'));
for ($i = 0; $i < $chars; $i++) {
$pass .= $letters[$i % 4][array_rand($letters[$i % 4])];
}
$dirty_words = array('bob', 'con', 'cum', 'fod', 'fuc', 'fud', 'fuk', 'gal', 'gat', 'mal', 'mam', 'mar', 'mec', 'pat', 'peg', 'per', 'pic', 'pil', 'pit', 'put', 'rab', 'tar', 'tes', 'tet', 'tol', 'vac', 'images', 'js', 'css', 'Services');
foreach ($dirty_words as $dirty_word) {
if (strpos($pass, $dirty_word) !== false) {
return mnemonic($chars, $numbers);
}
}
if ($numbers > 0) {
for ($i = 0; $i < $numbers; $i++) {
$pass .= $digits[$i % 2][array_rand($digits[$i % 2])];
}
}
return $pass;
}
function register_url($url)
{
global $tag_length;
global $MYSQL_TABLE_REDIRECTIONS;
global $logged_in;
$newtag = mnemonic($tag_length, 0);
//echo $newtag;
$query = "SELECT url FROM " . $MYSQL_TABLE_REDIRECTIONS . " WHERE tag='" . mysql_real_escape_string($newtag) . "';";
//echo $query;
//exit();
while (!mysql_query($query)) {
//keep trying till a random tag which is not already in DB is found
//TODO: A do-while loop would have been nicer
$newtag = mnemonic($tag_length, 0);
$query = "SELECT url FROM " . $MYSQL_TABLE_REDIRECTIONS . " WHERE tag='" . mysql_real_escape_string($newtag) . "';";
}
//now we have our tag, we have our URL, we have to get other information
$tagger = "";
if ($logged_in) {
$tagger = $_SESSION['OPENID_IDENTITY'];
} else {
$tagger = 'guest';
}
$ipaddress = $_SERVER['REMOTE_ADDR'];
$date_now = $mysqldate = date('Y-m-d H:i:s');
$query = "INSERT INTO " . $MYSQL_TABLE_REDIRECTIONS . " value('{$newtag}','{$url}','{$tagger}','{$ipaddress}','{$date_now}',0);";
if (mysql_query($query)) {
return $newtag;
} else {
die("Cannot insert into Database for URL: {$url} and tag:{$newtag}");
return false;
}
}