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.