Simple math expresions parser and calculator
src/NXP | ||
tests | ||
.gitignore | ||
.travis.yml | ||
composer.json | ||
LICENSE | ||
phpunit.xml.dist | ||
README.md |
NXP MathExecutor
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');