class Random

class Random

<?php

class Random
{
    public static function gen($min, $max, $seed = '')
    {
        $seed = self::seed($seed);
        $sumbols = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $md5str = md5($seed);
        $bigseed = '';
        foreach (str_split($md5str) as $item) {
            $bigseed .= strpos($sumbols, $item);
        }
        $bigseed = substr($bigseed, 10, $max);
        while ($bigseed > 2147483647) {
            $bigseed = $bigseed / 10;
        }
        $seed = intval($bigseed);
        mt_srand($seed);
        return mt_rand($min, $max);
    }

    public static function gen2($string_or_array, $seed = '', $return_array = false, $uniq = true, $delimiter = ',')
    {
        $seed = self::seed($seed);
        $arr = is_array($string_or_array) ? $string_or_array : explode($delimiter, $string_or_array);
        if (!is_array($string_or_array)) {
            $arr = array_map('trim', $arr);
        }
        if ($uniq) {
            $arr = array_unique($arr);
        }
        $uniq_keys = [];
        foreach ($arr as $key => $item) {
            $uniq_key = self::gen(0, 2147483647, $key . $seed);
            while (in_array($uniq_key, $uniq_keys)) {
                $uniq_key++;
            }
            $uniq_keys[] = $uniq_key;
        }
        $arr = array_combine($uniq_keys, $arr);
        ksort($arr);
        $arr = array_values($arr);
        return $return_array ? $arr : $arr[0];
    }

    private static function seed($seed)
    {
        if (!$seed && !empty($_SERVER['REQUEST_URI'])) {
            $seed = strtok($_SERVER['REQUEST_URI'], '?');
        }
        if (!$seed) {
            $seed = __FILE__;
        }
        return $seed;
    }
}