shorten.php

<?php

$q = $_SERVER['QUERY_STRING'];
$o = array();
if (preg_match_all('~longUrl=([^&]+)~', $q, $m)) {
    foreach ($m[1] as $v) {
        $url = urldecode($v);
        if (substr($url, 0, 14) != 'http://lnw.me/' && !isset($o[$url])) {
            $o[$url] = array(
                'shortUrl' => file_get_contents('http://lnw.me/s/short.php?url='
            );
        }
    }
}
echo $_GET['callback'] . '(';
echo json_encode(array(
    'results' => $o
));
echo ');';

?>