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