Magento 2: get the current currency code

Question

In Magento 1, you could retrieve the current currency code by doing:

Mage::app()->getStore()->getCurrentCurrencyCode()

I'm wondering what is the recommended way of doing it in Magento 2. In my case in a block.

Answer 1

In a block

In Magento 2, you can use the \Magento\Store\Model\StoreManagerInterface which is stored in an accessible variable $_storeManager for every class extending \Magento\Framework\View\Element\Template so most of the block classes (Template, Messages, Redirect block types but not Text nor TextList).

This way in your block, you can directly type the following code to get the current currency code:

$this->_storeManager->getStore()->getCurrentCurrency()->getCode()

No need to inject the \Magento\Store\Model\StoreManagerInterface in your construct as it's a variable accessible from any block class.

In any other class

You can inject the \Magento\Store\Model\StoreManagerInterface in your constructor:

protected $_storeManager;

public function __construct(\Magento\Store\Model\StoreManagerInterface $storeManager)
{
    $this->_storeManager = $storeManager;
}

Then call the same function as the block:

$this->_storeManager->getStore()->getCurrentCurrency()->getCode()

Answer 2

This takes inspiration from Magento\Framework\Pricing\Render\Amount and it's working good in my case (behaving like Magento):

protected $_priceCurrency;

public function __construct(
  ...
  \Magento\Framework\Pricing\PriceCurrencyInterface $priceCurrency,
  ...
)
{           
  $this->_priceCurrency = $priceCurrency;
  ...
}

/**
 * Get current currency code
 *
 * @return string
 */ 
public function getCurrentCurrencyCode()
{
  return $this->_priceCurrency->getCurrency()->getCurrencyCode();
}

You can get the currency symbol also:

/**
 * Get current currency symbol
 *
 * @return string
 */ 
public function getCurrentCurrencySymbol()
{
  return $this->_priceCurrency->getCurrency()->getCurrencySymbol();
}

Answer 3

expanding on the accepted answer if injecting the storemanagerinterface is not an option you can use the objectmanager like this:

/**
  5      * Get Store Name
  4      *
  3      * @return \Magento\Sales\Model\StoreManagerInterface
  2      */
  1     protected function getStore() {
123         $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
  1         $storeManager = $objectManager->get('Magento\Store\Model\StoreManagerInterface');
  2         return $storeManager->getStore();
  3     }

after which the currency can get fetched with $this->getStore()->getCurrentCurrency()->getCode();