seregas/formula

Formula

formula

, _(*1)

This package can parse and evaluate formulas with variables., _(*2)

It can take a string with a math expression and parses it so it can be evaluated replacing variables in the expression by given values., _(*3)

The packages supports operations like addition, subtraction, multiplication and division., _(*4)

Installation

The preferred way to install this extension is through composer., _(*5)

Either run, _(*6)

php composer.phar require --prefer-dist seregas/formula "*"

or add, _(*7)

"seregas/formula": "*"

to the require section of your composer.json file., _(*8)

Usage

Once the extension is installed, simply use it in your code by :, _(*9)

$parser = new \socialist\formula\Formula('2 + 3 * 2,65 + 25 - 26');
$parser->calculate(); // 8.95

Also in the formula you can use variables:, _(*10)

$parser = new \socialist\formula\Formula('2 + 3 * p + 25 - 26');
$parser->setVariable('p', 2,65);
$parser->calculate(); // 8.95

And insert comments like /*...*/, [...] or {...}:, _(*11)

$parser = new \socialist\formula\Formula('2 + 3 * p /* price */ + 25 - 26');
$parser->setVariable('p', 2,65);
$parser->calculate(); // 8.95