nkonovski/boolean-evaluator

Build boolean expressions and apply them to stuff

dev-master / 1.0.x-dev 2018-04-03 08:21 UTC

MIT

• David Jonas

README

This is an experiment in PHP to build up an expression that can be evaluated in arbitrary ways. It wasn't meant for production, but if you're interested drop me a line and I'll start tagging releases.

Install

Via Composer

$ composer require davidrjonas/boolean-evaluator

Usage

<?php

require __DIR__ . '/vendor/autoload.php';

use DavidRJonas\BooleanEvaluator as B;

$expr = (new B\Expression)
            ->bAnd('A', 'B')
            ->bOr('C', 'D')
            ->bNot(
                (new B\Expression)->bAnd('C', 'D')
            );

print (new B\Evaluator\Stringer)->apply($expr);
// output: A and B and (C or D) and not (C and D)

$evaluator = new B\Evaluator\SetContains;

var_dump($evaluator->apply($expr, ['A', 'B', 'C']));      // true
var_dump($evaluator->apply($expr, ['A', 'B', 'D']));      // true
var_dump($evaluator->apply($expr, ['A', 'B']));           // false, a C or D is missing
var_dump($evaluator->apply($expr, ['A', 'B', 'C', 'D'])); // false, C or D but not both

License

The MIT License (MIT). Please see License File for more information.