PHP ulinkout Extension Remove Tools

<?php
/**
 *
 * PHP ulinkout Extension Remove Tools
 *
 * @author jaideejung007 http://www.discuzthai.com
 * @copyright 2016 DiscuzThai
 * @license https://creativecommons.org/licenses/by/3.0/th/
 *
 * @version 0.1
 *
 * How to:
 * Save as to clr.php file and upload to your host within .ulinkout files, and run http://domain.com/folder/clr.php
 */

$dir = "./";

set_time_limit(0);
if (is_dir($dir)) {
    if ($dh = opendir($dir)) {
        while (($file = readdir($dh)) !== false) {
                        if(is_file($dir . $file)) {
                                if(pathinfo($file, PATHINFO_EXTENSION) == 'ulinkout') {
                            unlink($dir . $file);
                                }
                        }
        }
        closedir($dh);
    }
}

?>