krowinski / bcmath-extended

     * @param int $places

     * @return string

     */

    function roundDown($value, int $places) : string

    {

        $mult = bcpow(10, abs($places));

        return $places < 0 ?

            bcmul(BC::floor(bcdiv($value, $mult)), $mult) :

            bcdiv(BC::floor(bcmul($value, $mult)), $mult);

    }

    /**

     * @param int|string $value

     * @param int $places

     * @return string

     */

    function roundUp($value, $places) : string

    {

        $mult = bcpow(10, abs($places));

        return $places < 0 ?

            bcmul(BC::ceil(bcdiv($value, $mult)), $mult) :

            bcdiv(BC::ceil(bcmul($value, $mult)), $mult);

    }

}