<?php
$hashLevels = 2;
 
$dir = opendir(".");
 
while (($file = readdir($dir)) !== false) {
        if (!is_file($file)) continue;
        echo "$file\n";
        $md5 = md5($file);
        $hexString = substr($md5, 0, $hashLevels );
        $folder = "";
        while (strlen($hexString) > 0) {
                $folder =  "$hexString/$folder";
                $hexString = substr($hexString, 0, - 1);
        }
 
 
        mkdir($folder, 0777, true);
        rename($file, "$folder$file");
}
closedir($dir);
?>