filesAlias/inc/lib.files.alias.tools.php

<?php
/**
 * @brief filesAlias, a plugin for Dotclear 2
 *
 * @package Dotclear
 * @subpackage Plugin
 *
 * @author Osku and contributors
 *
 * @copyright Jean-Christian Denis
 * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
 */
class PallazzoTools
{
    public static function rand_uniqid()
    {
        $index   = 'abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $in      = time();
        $passKey = md5(uniqid((string) rand(), true));

        for ($n = 0; $n < strlen($index); $n++) {
            $i[] = substr($index, $n, 1);
        }

        $passhash = hash('sha256', $passKey);
        $passhash = (strlen($passhash) < strlen($index))
            ? hash('sha512', $passKey)
            : $passhash;

        for ($n = 0; $n < strlen($index); $n++) {
            $p[] = substr($passhash, $n, 1);
        }

        array_multisort($p, SORT_DESC, $i);
        $index = implode($i);

        $base = strlen($index);

        $out = '';
        for ($t = floor(log($in, $base)); $t >= 0; $t--) {
            $bcp = pow($base, $t);
            $a   = floor($in / $bcp) % $base;
            $out = $out . substr($index, $a, 1);
            $in  = $in - ($a * $bcp);
        }
        $out = strrev($out);

        return $out;
    }
}