GpsLab\Component\Base64UID\Base64UID::random()

Complexity

Conditions	6
Paths	6

Size

Total Lines	30
Code Lines	17

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	3
CRAP Score	25.3095

Importance

Changes	2
Bugs	0	Features	1

<?php
    private static function random($min, $max)
    {
        if (function_exists('random_int')) {
            return random_int($min, $max);
        }

        if (!function_exists('mcrypt_create_iv')) {
            throw new \Exception('mcrypt must be loaded for random_int to work');
        }

        $range = $counter = $max - $min;
        $bits = 1;

        while ($counter >>= 1) {
            ++$bits;
        }

        $bytes = (int) max(ceil($bits / 8), 1);
        $bitmask = pow(2, $bits) - 1;

        if ($bitmask >= PHP_INT_MAX) {
            $bitmask = PHP_INT_MAX;
        }

        do {
            $result = hexdec(bin2hex(mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM))) & $bitmask;
        } while ($result > $range);

        return $result + $min;
    }
}