periloso/evaluator

Evaluator

Symfony Expression Language module for Laravel.

Installation

Simply update the composer.json file and run composer install.

"require": {
	"periloso/evaluator": "1.0.*"
}

Quick Installation

composer require "periloso/evaluator=1.0.*"

How To Use

Evaluating an expression

$test = [
    'foo' => 10,
    'bar' => 5
];

echo Evaluator::evaluate('foo > bar', $test); //this will return true

You can also save the expression rule.

$test = [
    'foo' => 10,
    'bar' => 5
];

Evaluator::expression()->add('test', 'foo > bar');

echo Evaluator::evaluateRule('test', $test); //this will return true

For supported expressions, visit the Symfony Expression Language Component.

Condition

Let say we want to implement 10% tax to our collection.

$item = [
    'price' => 100
];

$condition = [
    'target' => 'price',
    'action' => '10%',
    'rule' => 'price > 50'
];

Evaluator::expression()->add('tax', $condition);

$calculated = Evaluator::condition('tax', $item);

Item with multiplier.

$item = [
	'price' => 50,
	'quantity' => 2
];

$condition = [
    'target' => 'price',
    'action' => '10%',
    'rule' => 'price > 50',
    'multiplier' => 'quantity'
];

Evaluator::expression()->add('tax', $condition);

$calculated = Evaluator::condition('tax', $item);