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The RoundingMode Enum

Introduction

(PHP 8 >= 8.4.0)

The RoundingMode enum is used to specify how rounding should be performed for round(), bcround(), and BcMath\Number::round().

Enum synopsis

enum RoundingMode
{
case HalfAwayFromZero ; // Round to the nearest integer. If the decimal part is 5, round to the integer with the larger absolute value.

case HalfTowardsZero ; // Round to the nearest integer. If the decimal part is 5, round to the integer with the smaller absolute value.

case HalfEven ; // Round to the nearest integer. If the decimal part is 5, round to the even integer.

case HalfOdd ; // Round to the nearest integer. If the decimal part is 5, round to the odd integer.

case TowardsZero ; // Round to the nearest integer with a smaller or equal absolute value.

case AwayFromZero ; // Round to the nearest integer with a greater or equal absolute value.

case NegativeInfinity ; // Round to the largest integer that is smaller or equal.

case PositiveInfinity ; // Round to the smallest integer that is greater or equal.

}

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https://www.php.net/manual/en/enum.roundingmode.php