Swap

Swap allows you to retrieve currency exchange rates from various services such as Fixer, Currency Data or Exchange Rates Data and optionally cache the results. It is integrated to other libraries like moneyphp/money and provides a Symfony Bundle and a Laravel Package.

QuickStart

$ composer require php-http/curl-client nyholm/psr7 php-http/message florianv/swap

use Swap\Builder;

// Build Swap
$swap = (new Builder())
    // Use the Fixer service as first level provider
    ->add('apilayer_fixer', ['api_key' => 'Get your key here: https://fixer.io/'])
     
    // Use the currencylayer service as first fallback
    ->add('apilayer_currency_data', ['api_key' => 'Get your key here: https://currencylayer.com'])
    
    // Use the exchangerates service as second fallback
    ->add('apilayer_exchange_rates_data', ['api_key' => 'Get your key here: https://exchangeratesapi.io'])
->build();
    
// Get the latest EUR/USD rate
$rate = $swap->latest('EUR/USD');

// 1.129
$rate->getValue();

// 2016-08-26
$rate->getDate()->format('Y-m-d');

// Get the EUR/USD rate 15 days ago
$rate = $swap->historical('EUR/USD', (new \DateTime())->modify('-15 days'));

We recommend to use the services that support our project, providing a free plan up to 100 requests per month.

Documentation

The documentation for the current branch can be found here.

Services

Here is the list of the currently implemented services:

Service	Base Currency	Quote Currency	Historical
Fixer	EUR (free, no SSL), * (paid)	*	Yes
Currency Data	USD (free), * (paid)	*	Yes
Exchange Rates Data	USD (free), * (paid)	*	Yes
Abstract	*	*	Yes
coinlayer	* Crypto (Limited standard currencies)	* Crypto (Limited standard currencies)	Yes
Fixer	EUR (free, no SSL), * (paid)	*	Yes
Currency Data	USD (free), * (paid)	*	Yes
exchangeratesapi	USD (free), * (paid)	*	Yes
European Central Bank	EUR	*	Yes
National Bank of Georgia	*	GEL	Yes
National Bank of the Republic of Belarus	*	BYN (from 01-07-2016), BYR (01-01-2000 - 30-06-2016), BYB (25-05-1992 - 31-12-1999)	Yes
National Bank of Romania	RON, AED, AUD, BGN, BRL, CAD, CHF, CNY, CZK, DKK, EGP, EUR, GBP, HRK, HUF, INR, JPY, KRW, MDL, MXN, NOK, NZD, PLN, RSD, RUB, SEK, TRY, UAH, USD, XAU, XDR, ZAR	RON, AED, AUD, BGN, BRL, CAD, CHF, CNY, CZK, DKK, EGP, EUR, GBP, HRK, HUF, INR, JPY, KRW, MDL, MXN, NOK, NZD, PLN, RSD, RUB, SEK, TRY, UAH, USD, XAU, XDR, ZAR	Yes
National Bank of Ukranie	*	UAH	Yes
Central Bank of the Republic of Turkey	*	TRY	Yes
Central Bank of the Republic of Uzbekistan	*	UZS	Yes
Central Bank of the Czech Republic	*	CZK	Yes
Central Bank of Russia	*	RUB	Yes
Bulgarian National Bank	*	BGN	Yes
WebserviceX	*	*	No
1Forge	* (free but limited or paid)	* (free but limited or paid)	No
Cryptonator	* Crypto (Limited standard currencies)	* Crypto (Limited standard currencies)	No
CurrencyDataFeed	* (free but limited or paid)	* (free but limited or paid)	No
Open Exchange Rates	USD (free), * (paid)	*	Yes
Xignite	*	*	Yes
Currency Converter API	*	*	Yes (free but limited or paid)
xChangeApi.com	*	*	Yes
fastFOREX.io	USD (free), * (paid)	*	No
exchangerate.host	*	*	Yes
Array	*	*	Yes

Additionally, you can add your own services as long as they implement the ExchangeRateService interface.

Currency exchange rates library

Sponsors

QuickStart

Documentation

Services

Integrations

Credits

License

	Fixer is a simple and lightweight API for foreign exchange rates that supports up to 170 world currencies.
	currencylayer provides reliable exchange rates and currency conversions for your business up to 168 world currencies.
	exchangerates provides reliable exchange rates and currency conversions for your business with over 15 data sources.