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<?php |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2016 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace Jose\Util; |
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/** |
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* Class String. |
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*/ |
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final class StringUtil |
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{ |
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/** |
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* @param int $size |
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* |
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* @return string |
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*/ |
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public static function generateRandomBytes($size) |
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{ |
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if (function_exists('random_bytes')) { |
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return random_bytes($size); |
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} elseif (function_exists('openssl_random_pseudo_bytes')) { |
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return openssl_random_pseudo_bytes($size); |
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} elseif (function_exists('mcrypt_create_iv')) { |
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return mcrypt_create_iv($size); |
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} |
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throw new \RuntimeException('Unable to create random bytes.'); |
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} |
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/** |
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* @param string $string |
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* |
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* @return int |
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*/ |
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public static function getStringLength($string) |
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{ |
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return function_exists('mb_strlen') ? mb_strlen($string, '8bit') : strlen($string); |
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} |
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/** |
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* @param string $string |
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* @param int $start |
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* @param null|int $length |
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* |
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* @return string |
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*/ |
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public static function getSubString($string, $start, $length = null) |
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{ |
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return function_exists('mb_substr') ? mb_substr($string, $start, $length, '8bit') : substr($string, $start, $length); |
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} |
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/** |
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* @param string $input |
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* @param int $pad_length |
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* @param null|string $pad_string |
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* @param null|int $pad_style |
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* |
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* @return string |
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*/ |
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public static function addPadding($input, $pad_length, $pad_string = null, $pad_style = null) |
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{ |
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return function_exists('mb_strlen') ? self::addPaddingMultiBytes($input, $pad_length, $pad_string, $pad_style) : str_pad($input, $pad_length, $pad_string, $pad_style); |
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} |
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/** |
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* @param string $input |
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* @param int $pad_length |
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* @param null|string $pad_string |
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* @param null|int $pad_style |
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* |
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* @return string |
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*/ |
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private static function addPaddingMultiBytes($input, $pad_length, $pad_string = null, $pad_style = null) |
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{ |
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return str_pad($input, strlen($input) - mb_strlen($input, '8bit') + $pad_length, $pad_string, $pad_style); |
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} |
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} |
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Spomky-Labs /
jose
