public static function up($string): string
    {
        if (self::isMBString()) {
            return mb_strtoupper($string, self::$encoding);
        }

        return strtoupper($string); // @codeCoverageIgnore
    }
public static function up($string): string
    {
        if (self::isMBString()) {
            return mb_strtoupper($string, self::$encoding);
        }

        return strtoupper($string); // @codeCoverageIgnore
    }
public static function up ( $ string ) : string { if ( self :: isMBString ( ) ) { return mb_strtoupper ( $ string , self :: $ encoding ) ; } return strtoupper ( $ string ) ; // @codeCoverageIgnore }
Make a string uppercase

@param string $string
@return string

@SuppressWarnings(PHPMD.ShortMethodName)
Make a string uppercase