mirror of
https://github.com/Karaka-Management/phpOMS.git
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56 lines
1.2 KiB
PHP
56 lines
1.2 KiB
PHP
<?php
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/**
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* Orange Management
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*
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* PHP Version 7.2
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*
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* @package TBD
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* @copyright Dennis Eichhorn
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* @license OMS License 1.0
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* @version 1.0.0
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* @link http://website.orange-management.de
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*/
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declare(strict_types=1);
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namespace phpOMS\Math\Parser;
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/**
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* Shape interface.
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*
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* @package Framework
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* @license OMS License 1.0
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* @link http://website.orange-management.de
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* @since 1.0.0
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*/
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class Evaluator
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{
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/**
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* Evaluate function.
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*
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* Example: ('2*x^3-4x', ['x' => 99])
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*
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* @param string $formula Formula to differentiate
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* @param array $vars Variables to evaluate
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*
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* @return float
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*
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* @throws \Exception
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*
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* @since 1.0.0
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*/
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public static function evaluate(string $formula, array $vars) : float
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{
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// todo: do i need array_values here?
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$formula = \str_replace(array_keys($vars), array_values($vars), $formula);
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// todo: this is horrible in case things like mod etc. need to be supported
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if (\preg_match('#[^0-9\+\-\*\/\(\)]#', $formula)) {
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throw new \Exception('Bad elements');
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}
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// todo: create parser
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return 0;
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}
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}
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