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Decimal value object for PHP.

Background

When working with monetary values, normal data types like int or float are not suitable for exact arithmetic. Try out the following in PHP:

var_dump(0.1 + 0.2); // float(0.3)
var_dump(0.1 + 0.2 - 0.3); // float(5.5511151231258E-17)

Handling them as string is a workaround, but as value object you can more easily encapsulate some of the logic.

Alternatives

Solutions like https://php-decimal.io require a PHP extension (would make it faster, but also more difficult for some servers to be available). For details see the wiki.

Features

• Super strict on precision/scale. Does not lose significant digits on its own. You need to trim() for this manually.
• Speaking API (no le, gt methods).
• Basic math operations and checks supported.
• Immutability.
• Handle very large and very small numbers.

Installation

Requirements

• bcmath PHP extension enabled

Composer (preferred)

composer require spryker/decimal-object

Usage

See Documentation for more details.

Implementations

The following libraries are using the Decimal value object:

• dereuromark/cakephp-decimal as decimal type replacement for CakePHP ORM.