Unnamed

<?php
$folder = '';
$exts = 'mp3';
$files = array(); $i = -1;
if ('' == $folder) $folder = './';
$handle = opendir($folder);
$exts = explode(' ', $exts);
while (false !== ($file = readdir($handle))) {
    foreach($exts as $ext) { // for each extension check the extension
        if (preg_match('/\.'.$ext.'$/i', $file, $test)) {
            $files[] = $file; // it's good
            ++$i;
            }
        }
    }
closedir($handle);
mt_srand((double)microtime()*1000000);
$rand = mt_rand(0, $i);

header('Location: '.$folder.$files[$rand]);
?>