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Vendor fintara
Package calculator-php
Short Description Calculator for arithmetic expressions
License MIT

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Informations about the package calculator-php

PHP Calculator for arithmetic expressions

PHP calculator which evaluates different arithmetic expressions:

The included functions by default are sqrt(x) and log(base, arg), but there is also an option to add custom functions with any number of arguments.

Basic usage

Advanced usage

Custom functions

You can add custom functions:

name: name of the function, as it will be used in expressions. All lower case and _ (underscore) allowed.
implementation: how to evaluate the function.

Tokenizer

You can also use the tokenizer (or supply calculator with your own):

In case the expression contains functions (e.g. sqrt(x)), the tokenizer needs to know all functions' names as second parameter.

Note: The default tokenizer automatically adds * (multiplication) sign between a number and following function or a number and following parenthesis (if the sign is not found).

Changelog

2.0.1

Added LICENSE

2.0.0

Breaking: operator mod is renamed to %.
Breaking: addFunction does not need number of arguments anymore (removed 3rd argument).
Breaking: adding function with existing name throws. You can use the helper replaceFunction.
Breaking: getReversePolishNotation is private.
Breaking: setExpression is removed. Use directly calculate($expression).
Breaking: ILexer and DefaultLexer are replaced with TokenizerInterface and Tokenizer respectively.

All versions of calculator-php with dependencies

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Package Version

Version 2.0.1 Release 13. Apr 2022
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Requires php Version >=7.1

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