/** @todo document */
function randomUrlList($length)
{
$list = array();
for ($i = 0; $i < $length; $i++) {
$list[] = randomUrl();
}
return $list;
}
$possible = "0123456789";
break;
}
$i = 0;
while ($i < $length) {
$str .= substr($possible, mt_rand(0, strlen($possible) - 1), 1);
$i++;
}
return $str;
}
if (isset($_POST['url']) && empty($_POST['antispam'])) {
$database = DB::getInstance();
$url_to_shorten = $database->filter($_POST['url']);
if (filter_var($url_to_shorten, FILTER_VALIDATE_URL) !== FALSE) {
$check_column = 'long_url';
$check_for = array('long_url' => $url_to_shorten);
$exists = $database->exists('shortened_urls', $check_column, $check_for);
if ($exists) {
list($shortened_url) = $database->get_row("SELECT short_url FROM shortened_urls WHERE long_url = '{$url_to_shorten}' ");
echo $shortened_url;
} else {
$shortening = array('long_url' => $url_to_shorten, 'short_url' => randomUrl(), 'date_created' => time());
$add_query = $database->insert('shortened_urls', $shortening);
if ($add_query) {
echo $shortening['short_url'];
}
}
} else {
echo 'INVALID_URL';
}
}