This code allows to list the contents of any given directory.

gistfile1.php

<?php
/* Source: http://www.apphp.com/index.php?snippet=php-list-directory-contents */
function list_directory_content($dir){
    if(is_dir($dir)){
        if($handle = opendir($dir)){
            while(($file = readdir($handle)) !== false){
                if($file != '.' && $file != '..' && $file != '.htaccess'){
                    echo '<a target="_blank" href="'.$dir.$file.'">'.$file.'</a><br>'."\n";
                }
            }
            closedir($handle);
        }
    }
}