Change a currency symbol AMD to Դրամ

/**

 * Change a currency symbol

 */

add_filter('woocommerce_currency_symbol', 'change_existing_currency_symbol', 10, 2);

function change_existing_currency_symbol( $currency_symbol, $currency ) {

     switch( $currency ) {

          case 'AMD': $currency_symbol = '֏'; break;

     }

     return $currency_symbol;

}