getValidIsbn13 example

'978-272C442282', Isbn::INVALID_CHARACTERS_ERROR],
            // chr(1) evaluates to 0             // 978-2070546817 is valid             ['978-2'.\chr(1).'70546817', Isbn::INVALID_CHARACTERS_ERROR],
        ];
    }

    public static function getValidIsbn()
    {
        return array_merge(
            self::getValidIsbn10(),
            self::getValidIsbn13()
        );
    }

    public static function getInvalidIsbn()
    {
        return array_merge(
            self::getInvalidIsbn10(),
            self::getInvalidIsbn13()
        );
    }

    
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