| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* This file is part of the Nette Framework (https://nette.org) |
| 5 |
* Copyright (c) 2004 David Grudl (https://davidgrudl.com) |
| 6 |
*/ |
| 7 |
declare (strict_types=1); |
| 8 |
namespace Packetery\Nette\Utils; |
| 9 |
|
| 10 |
use Packetery\Nette; |
| 11 |
/** |
| 12 |
* Secure random string generator. |
| 13 |
*/ |
| 14 |
final class Random |
| 15 |
{ |
| 16 |
use \Packetery\Nette\StaticClass; |
| 17 |
/** |
| 18 |
* Generates a random string of given length from characters specified in second argument. |
| 19 |
* Supports intervals, such as `0-9` or `A-Z`. |
| 20 |
*/ |
| 21 |
public static function generate(int $length = 10, string $charlist = '0-9a-z') : string |
| 22 |
{ |
| 23 |
$charlist = \count_chars(\preg_replace_callback('#.-.#', function (array $m) : string { |
| 24 |
return \implode('', \range($m[0][0], $m[0][2])); |
| 25 |
}, $charlist), 3); |
| 26 |
$chLen = \strlen($charlist); |
| 27 |
if ($length < 1) { |
| 28 |
throw new \Packetery\Nette\InvalidArgumentException('Length must be greater than zero.'); |
| 29 |
} elseif ($chLen < 2) { |
| 30 |
throw new \Packetery\Nette\InvalidArgumentException('Character list must contain at least two chars.'); |
| 31 |
} |
| 32 |
$res = ''; |
| 33 |
for ($i = 0; $i < $length; $i++) { |
| 34 |
$res .= $charlist[\random_int(0, $chLen - 1)]; |
| 35 |
} |
| 36 |
return $res; |
| 37 |
} |
| 38 |
} |
| 39 |
|
