55 lines
1.2 KiB
PHP
55 lines
1.2 KiB
PHP
<?php
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/**
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* This file is part of the Nette Framework (https://nette.org)
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* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
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*/
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declare(strict_types=1);
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namespace Nette\Utils;
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use Nette;
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use Random\Randomizer;
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use function strlen;
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use const PHP_VERSION_ID;
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/**
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* Secure random string generator.
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*/
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final class Random
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{
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use Nette\StaticClass;
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/**
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* Generates a random string of given length from characters specified in second argument.
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* Supports intervals, such as `0-9` or `A-Z`.
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*/
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public static function generate(int $length = 10, string $charlist = '0-9a-z'): string
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{
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$charlist = preg_replace_callback(
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'#.-.#',
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fn(array $m): string => implode('', range($m[0][0], $m[0][2])),
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$charlist,
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);
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$charlist = count_chars($charlist, mode: 3);
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$chLen = strlen($charlist);
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if ($length < 1) {
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throw new Nette\InvalidArgumentException('Length must be greater than zero.');
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} elseif ($chLen < 2) {
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throw new Nette\InvalidArgumentException('Character list must contain at least two chars.');
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} elseif (PHP_VERSION_ID >= 80300) {
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return (new Randomizer)->getBytesFromString($charlist, $length);
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}
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$res = '';
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for ($i = 0; $i < $length; $i++) {
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$res .= $charlist[random_int(0, $chLen - 1)];
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}
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return $res;
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}
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}
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