Libraries tagged by precision

Arbitrary-precision arithmetic library

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Object-oriented wrapper/shim for BC Math PHP extension. Allows for arbitrary-precision math operations.

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Correctly-rounded arbitrary precision decimal floating point

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Extends php BCMath lib for missing functions like floor, ceil, round, abs, min, max, rand for big numbers. Also wraps existing BCMath functions. (more http://php.net/manual/en/book.bc.php) Supports scientific notations

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Pure-PHP arbitrary precission integer arithmetic library. If GMP or BCMath are available they are used.

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IDE and static analysis helper for the decimal extension

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Phactor is a high-performance PHP implementation of the elliptic curve math functions required to generate & verify private/public (asymmetric) EC keypairs and ECDSA signatures based on secp256k1 curve parameters. This library also includes a class to generate Service Identification Numbers (SINs) based on the published Identity Protocol v1 spec.

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Generate metrics with ease and precision.

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An object oriented immutable arbitrary-precision arithmetic library for PHP

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Correctly-rounded, arbitrary precision decimal floating-point arithmetic in PHP

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Magento 2 Price Decimal Precision

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gmp-based arbitrary precision operations on currency amounts "XXX.YY"; because floats are BAD for representing money

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CakePHP plugin for decimal handling via value object. Provides DecimalType class.

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Slide into Precision – Customizable Control at Your Fingertips.

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A modern PHP library for formatting and parsing byte values with precision and flexibility.

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