ben-gibson/bryn-fallback-calculator

An exchange rate calculator that defers calculation to its registered calculators in priority order until an exchange rate is successfully returned.

Bryn - Fallback Calculator

![Software License][ico-license] ![Total Downloads][ico-downloads], _(*1)

A fallback calculator for Bryn that defers to registered calculators in priority order until an exchange rate is returned or they all fail., _(*2)

Install

Use composer to install this library., _(*3)

``` bash $ composer require ben-gibson/bryn-fallback-calculator, <sub>(*4)</sub>

## Usage

``` php
<?php

require 'vendor/autoload.php';

$calculator = new \Gibbo\Bryn\Calculator\Fallback\FallbackCalculator();

$calculator->registerCalculator(Gibbo\Bryn\Calculator\Yahoo\YahooCalculator::default());
$calculator->registerCalculator(Gibbo\Bryn\Calculator\ECB\ECBCalculator::default());

$exchangeRate = $calculator->getRate(
    new \Gibbo\Bryn\Exchange(
        \Gibbo\Bryn\Currency::GBP(),
        \Gibbo\Bryn\Currency::USD()
    )
);

echo $exchangeRate;
echo $exchangeRate->convert(550);
echo $exchangeRate->flip()->convert(550);

/**
 * OUTPUTS:
 *
 * 1 GBP(£) = 1.25 USD($)
 * 686.2295
 * 440.814
 */

Change log

Please see CHANGELOG for more information what has changed recently., <sub>(*5)</sub>

Testing

bash $ composer test, <sub>(*6)</sub>

Contributing

Please see CONTRIBUTING for details., <sub>(*7)</sub>

Security

If you discover any security related issues, please email ben.gibson.2011@gmail.com instead of using the issue tracker., <sub>(*8)</sub>

Credits

• Ben Gibson
• All Contributors

License

The MIT License (MIT). Please see License File for more information., <sub>(*9)</sub>