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albertoarena/calculator
=======================

Simple calculator

v1.0.1(1y ago)025MITPHP ^8.2

Since Nov 14Compare

[ Source](https://github.com/albertoarena/calculator)[ Packagist](https://packagist.org/packages/albertoarena/calculator)[ RSS](/packages/albertoarena-calculator/feed)WikiDiscussions Synced 1mo ago

READMEChangelogDependencies (5)Versions (5)Used By (0)

Calculator
==========

[](#calculator)

[![build-test](coverage.svg)](coverage.svg)

Simple PHP calculator, inspired by [shunting-yard algorithm](http://en.wikipedia.org/wiki/Shunting-yard_algorithm).

It supports basic operators (+, -, /, \*, ^), trigonometric operators and precedence.

Compatibility
-------------

[](#compatibility)

WhatVersionPHP8.2Operators
---------

[](#operators)

Operator precedence follows the standard (see [Wikipedia](https://en.wikipedia.org/wiki/Order_of_operations#Definition)):

OperatorAliasPrecedenceDescription`^``**`Highexponent (power)`√``sqrt`Highsquare root`!`HighFibonacci number`%`Highpercentage`*`Mediummultiplication`/`Mediumdivision`sin`Mediumsine`cos`Mediumcosine`tan`Mediumtangent`asin`Mediumarc sine`acos`Mediumarc cosine`atan`Mediumarc tangent`+`Lowaddition`-`LowsubtractionHow to use it
-------------

[](#how-to-use-it)

A working example is available in `samples/basic.php`.

```
use Calculator\Calculator;

$calculator = new Calculator();

// ----------------------------
// Basic operators
// ----------------------------
$calculator->number(1)
    ->operator('+')->number(5)
    ->operator('*')->number(3.5)
    ->operator('/')->number(2)
    ->execute();

echo $calculator;
// ==> 1 + 5 * 3.5 / 2 = 9.75

// ----------------------------
// Power
// ----------------------------
$calculator->number(2)
    ->operator('*')->number(2)
    ->operator('^')->number(4)
    ->execute();

echo $calculator;
// ==> 2 * 2 ^ 4 = 32

// ----------------------------
// Square root
// ----------------------------
$result = $calculator->number(9)
    ->operator('√')
    ->execute();

echo $calculator;
// ==> √9 = 3

// ----------------------------
// Trigonometry
// ----------------------------
$result = $calculator->number(1)
    ->operator('cos')
    ->execute();

echo $calculator;
// ==> cos(1) = 0.54030230586814

// ----------------------------
// Fibonacci number
// ----------------------------
$result = $calculator->number(40)
    ->operator('!')
    ->execute();

echo $calculator;
// ==> 40! = 102334155

// ----------------------------
// Percentage
// ----------------------------
$result = $calculator->number(40.32)
    ->operator('%')
    ->execute();

echo $calculator;
// ==> 40.32% = 0.4032

// ----------------------------
// Group operations (parentheses)
// ----------------------------
$result = $calculator
    ->group(function (Calculator $calculator) {
        $calculator
            ->number('pi')
            ->operator('/')->number(4);
    })
    ->operator('cos')
    ->execute();

echo $calculator;
// ==> cos(pi / 4) = 0.7071067811865
```

###  Health Score

37

—

LowBetter than 82% of packages

Maintenance42

Moderate activity, may be stable

Popularity6

Limited adoption so far

Community6

Small or concentrated contributor base

Maturity79

Established project with proven stability

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~1106 days

Total

4

Last Release

509d ago

Major Versions

0.2 → v1.0.02024-12-09

PHP version history (2 changes)0.1PHP >=5.3.0

v1.0.0PHP ^8.2

### Community

Maintainers

![](https://www.gravatar.com/avatar/ed727b9cf4356b9a50c806a543eed4942cba0854795ac8d1430006e6e6d3be47?d=identicon)[albertoarena](/maintainers/albertoarena)

---

Top Contributors

[![albertoarena](https://avatars.githubusercontent.com/u/1126630?v=4)](https://github.com/albertoarena "albertoarena (29 commits)")

###  Code Quality

TestsPHPUnit

Static AnalysisPHPStan

Code StyleLaravel Pint

Type Coverage Yes

### Embed Badge

![Health badge](/badges/albertoarena-calculator/health.svg)

```
[![Health](https://phpackages.com/badges/albertoarena-calculator/health.svg)](https://phpackages.com/packages/albertoarena-calculator)
```

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