phpmyadmin/simple-math

Simple math evaluator

SimpleMath

Simple math expression evaluator., _(*1)

Please note that in most cases it's better to use Symfony ExpressionLanguage Component instead. It performs better and provides more features., _(*2)

This repository will probably not receive any updates in future., _(*3)

, _(*4)

Features

• Supports basic arithmetic operations +, -, *, /, %
• Supports parenthesis
• Supports right associative ternary operator
• Supports comparison operators ==, !=, >, <, >=, <=
• Supports basic logical operations &&, ||
• Supports variables (either PHP style $a or simple n)

The library was developed in order to be able to evaluate Gettext plural equations, but can be used for any mathematical calculations., _(*5)

Installation

Please use Composer to install:, _(*6)

composer require phpmyadmin/simple-math

Documentation

The API documentation is available at https://develdocs.phpmyadmin.net/simple-math/., _(*7)

Object API usage

// Create math object
$math = new SimpleMath\Math();

// Evaluate expression
$value = $math->evaluate('1 + 2');

// Evaluate expression with PHP style variable
$math->registerVariable('$a', 4);
$value = $math->evaluate('$a + 1');

// Evaluate expression with variable
$math->registerVariable('n', 4);
$value = $math->evaluate('n + 1');

// Calculate same expression with different values
$math = new SimpleMath\Math();

$math->parse('n + 1');

$math->registerVariable('n', 10);
$value = $math->run();

$math->registerVariable('n', 100);
$value = $math->run();

History

This library is based on Expressions.php gist. It adds some functions, performance improvements and ability to install using Composer., _(*8)