public static function lower($string)
    {
        if (function_exists('mb_strtolower')) {
            return mb_strtolower($string, static::getEncoding());
        }

        return static::replaceByMap($string, static::$cyrillicAlphabet[0], static::$cyrillicAlphabet[1]);
    }
public static function lower($string)
    {
        if (function_exists('mb_strtolower')) {
            return mb_strtolower($string, static::getEncoding());
        }

        return static::replaceByMap($string, static::$cyrillicAlphabet[0], static::$cyrillicAlphabet[1]);
    }
public static function lower ( $ string ) { if ( function_exists ( 'mb_strtolower' ) ) { return mb_strtolower ( $ string , static :: getEncoding ( ) ) ; } return static :: replaceByMap ( $ string , static :: $ cyrillicAlphabet [ 0 ] , static :: $ cyrillicAlphabet [ 1 ] ) ; }
Lower case.
@param $string
@return bool|string
Lower case .