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