carriongrow/formula_parser

Parses formulas, with the possibility of a deferred solution with substitution of user variables

v1.1.5 2022-02-25 13:33 UTC

Requires

• php: >=7.2.0
• ext-json: *

Requires (Dev)

• phpunit/phpunit: ^7

MIT

• Anatoliy Snegovskiy

README

Parses formulas, with the possibility of a deferred solution with substitution of user variables

composer require carriongrow/formula_parser

Installation

$ composer require carriongrow/formula_parser

Description

Supported functions basic = '*', '/', '+', '-', '^' functional operations = 'cos', 'sin', 'exp', 'abs', 'log', 'sqrt', 'tan', 'pi'

cos sin tan - Do not require a transfer from degrees to the radian equivalent

Available symbols for dynamic variables: 0-9 a-z _ .or [a-z.0-9_] no dependence on the register!

Example

 $parser = new FormulaParser();
 $parser->setFormula('test1 * test2 * 2 (1 + 10) / 20'); // Parsing formulas once
 $counter = 1000;
 $result = [];
 while ($counter != 0) { // We use it as many times as we need
   $first = rand(1, getrandmax()) / getrandmax();
   $second = rand(1, getrandmax()) / getrandmax();
   $parser->setVariables(['test1' => $first, 'test2' => $second]); // Replacing user variables with values
   $result[] = $parser->calculate();
   $counter--;
 }

more look in tests - https://github.com/AnatolySnegovskiy/FormulaParser/blob/master/test/FormulaParserTest.php