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<?php |
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/** |
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* This file is part of the PHP Generics package. |
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* |
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* @package Generics |
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*/ |
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namespace Generics\Util; |
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/** |
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* This utility class helps to generate a random string |
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* |
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* @author Maik Greubel <[email protected]> |
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* |
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*/ |
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class RandomString |
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{ |
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/** |
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* ISO Characters |
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* |
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* @final |
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* |
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*/ |
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const ISO = 1; |
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/** |
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* ASCII Characters |
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* |
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* @final |
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* |
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*/ |
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const ASCII = 2; |
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/** |
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* Generate a random string with specific length |
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* |
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* @param number $length |
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* The length of string to generate |
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* @param int $allowed |
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* Type of allowed characters |
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* @param boolean $repeatable |
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* Whether a character may be reused |
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* |
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* @return string The generated string |
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*/ |
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public static function generate($length = 8, $allowed = RandomString::ASCII, $repeatable = true): string |
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{ |
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$allowedChars = array(); |
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3 |
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$currentLocale = setlocale(LC_ALL, "0"); |
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if ($allowed == RandomString::ASCII) { |
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setlocale(LC_ALL, "C"); |
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} |
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3 |
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for ($i = 32; $i < 256; $i ++) { |
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if (($allowed == RandomString::ASCII && ! ctype_alnum(chr($i))) || (! ctype_print(chr($i)))) { |
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continue; |
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} |
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$allowedChars[] = $i; |
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} |
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3 |
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self::resetLocaleTo($currentLocale); |
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3 |
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$used = array(); |
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3 |
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$string = ""; |
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3 |
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$i = $length; |
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3 |
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while ($i > 0) { |
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3 |
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$index = mt_rand(0, count($allowedChars) - 1); |
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3 |
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if (! $repeatable && in_array($index, $used)) { |
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continue; |
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} |
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3 |
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$string .= chr($allowedChars[$index]); |
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3 |
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$used[] = $i; |
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3 |
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$i --; |
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} |
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return $string; |
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} |
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/** |
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* Reset the locale settings back to saved vars |
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* |
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* @param string $localeSaved |
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* String containing the locale infos obtained using setlocale(LC_ALL, ''); |
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*/ |
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3 |
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private static function resetLocaleTo($localeSaved) |
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{ |
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3 |
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$localeData = explode(';', $localeSaved); |
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3 |
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foreach ($localeData as $identifier) { |
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3 |
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if (! strchr($identifier, '=')) { |
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2 |
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continue; |
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} |
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1 |
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$type = $value = null; |
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1 |
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sscanf($identifier, "%s=%s", $type, $value); |
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switch ($type) { |
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1 |
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case 'LC_ALL': |
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setlocale(LC_ALL, $value); |
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break; |
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1 |
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case 'LC_COLLATE': |
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setlocale(LC_COLLATE, $value); |
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break; |
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1 |
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case 'LC_CTYPE': |
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setlocale(LC_CTYPE, $value); |
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break; |
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1 |
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case 'LC_MONETARY': |
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setlocale(LC_MONETARY, $value); |
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break; |
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1 |
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case 'LC_NUMERIC': |
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setlocale(LC_NUMERIC, $value); |
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break; |
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1 |
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case 'LC_TIME': |
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setlocale(LC_TIME, $value); |
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break; |
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1 |
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case 'LC_MESSAGES': |
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setlocale(LC_MESSAGES, $value); |
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break; |
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default: |
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; |
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1 |
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break; |
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} |
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} |
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3 |
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} |
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} |
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maikgreubel /
phpgenerics
