<?php     /**    * listdir    */    header("content-type:text/html;charset=utf-8");    $dirname = "./final/factapplication";    function listdir($dirname) {        $ds = opendir($dirname);        while (false !== ($file = readdir($ds))) {            $path = $dirname.'/'.$file;            if ($file != '.' && $file != '..') {                if (is_dir($path)) {                    listdir($path);                } else {                    echo $file."<br>";                }            }        }        closedir($ds);    }    listdir($dirname);