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Example code of ez-php/bignum

Informations about the package bignum

ez-php/bignum

Arbitrary-precision integer and decimal arithmetic for PHP 8.5+.

Provides immutable BigInteger and BigDecimal value objects backed by PHP's built-in bcmath extension — no external Composer dependencies, no PECL extensions required. Optionally uses gmp as a faster backend for integer operations.

Installation

Requires ext-bcmath (ships with PHP). Optionally install ext-gmp for faster BigInteger arithmetic.

Quick Start

API

BigInteger

BigDecimal

RoundingMode

Mode Behaviour
UP Round away from zero
DOWN Round towards zero (truncate)
CEILING Round towards positive infinity
FLOOR Round towards negative infinity
HALF_UP Round half away from zero (standard)
HALF_DOWN Round half towards zero
HALF_EVEN Round half to nearest even digit (banker's rounding)

DivisionByZeroException

Thrown by divide, dividedBy, and mod when the divisor is zero. Extends \ArithmeticError.

Backend Selection

BigInteger auto-selects the best available backend:

  1. GmpBackend — used when ext-gmp is loaded (faster for large integers)
  2. BcMathBackend — always available fallback

BigDecimal always uses bcmath directly (GMP does not support decimal arithmetic).

To force a specific backend:

Design

License

MIT

All versions of bignum with dependencies

PHP Build Version
Package Version
Requires php Version ^8.5
ext-bcmath Version *
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