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* @copyright 2011 The Authors * @license http://www.opensource.org/licenses/mit-license.html MIT License * @version Build @@version@@ */ namespace SecurityLib; /** * The Utility trait. * * Contains methods used internally to this library. * * @category PHPPasswordLib * @package Random * @author Scott Arciszewski
* @license http://www.opensource.org/licenses/mit-license.html MIT License * @codeCoverageIgnore */ abstract class Util { /** * Return the length of a string, even in the presence of * mbstring.func_overload * * @param string $string the string we're measuring * @return int */ public static function safeStrlen($string) { if (\function_exists('mb_strlen')) { return \mb_strlen($string, '8bit'); } return \strlen($string); } /** * Return a string contained within a string, even in the presence of * mbstring.func_overload * * @param string $string The string we're searching * @param int $start What offset should we begin * @param int|null $length How long should the substring be? * (default: the remainder) * @return string */ public static function safeSubstr($string, $start = 0, $length = null) { if (\function_exists('mb_substr')) { return \mb_substr($string, $start, $length, '8bit'); } elseif ($length !== null) { return \substr($string, $start, $length); } return \substr($string, $start); } }