tobyberesford / mathexecutor
Simple math expressions calculator
v0.1.1
2021-03-04 13:33 UTC
This package is auto-updated.
Last update: 2024-06-04 20:27:38 UTC
README
Simple math expressions calculator
Install via Composer
All instructions to install here: https://packagist.org/packages/nxp/math-executor
Sample usage:
require "vendor/autoload.php"; $calculator = new \NXP\MathExecutor(); print $calculator->execute("1 + 2 * (2 - (4+10))^2 + sin(10)");
Functions:
Default functions:
- sin
- cos
- tn
- asin
- acos
- atn
- min
- max
- avg
Add custom function to executor:
$executor->addFunction('abs', function($arg) { return abs($arg); }, 1);
Operators:
Default operators: + - * / ^
Add custom operator to executor:
MyNamespace/ModulusToken.php:
<?php namespace MyNamespace; use NXP\Classes\Token\AbstractOperator; class ModulusToken extends AbstractOperator { /** * Regex of this operator * @return string */ public static function getRegex() { return '\%'; } /** * Priority of this operator * @return int */ public function getPriority() { return 3; } /** * Associaion of this operator (self::LEFT_ASSOC or self::RIGHT_ASSOC) * @return string */ public function getAssociation() { return self::LEFT_ASSOC; } /** * Execution of this operator * @param InterfaceToken[] $stack Stack of tokens * @return TokenNumber Result of execution */ public function execute(&$stack) { $op2 = array_pop($stack); $op1 = array_pop($stack); $result = $op1->getValue() % $op2->getValue(); return new TokenNumber($result); } }
And adding to executor:
$executor->addOperator('MyNamespace\ModulusToken');
Variables:
Default variables:
$pi = 3.14159265359
$e = 2.71828182846
You can add own variable to executor:
$executor->setVars(array( 'var1' => 0.15, 'var2' => 0.22 )); $executor->execute("$var1 + $var2");