woocommerce: Add new currency to WooCommerce

gistfile1.php

<?php 

// Just add it to functions.php

// Add currency / symbol
add_filter( 'woocommerce_currencies', 'add_rand_currency' );
add_filter( 'woocommerce_currency_symbol', 'add_rand_currency_symbol' );

function add_rand_currency( $currencies ) {
    $currencies['HRK'] = __( 'Hrvatska kuna (Kn)', 'woothemes' );
    return $currencies;
}

function add_rand_currency_symbol( $symbol ) {
    $currency = get_option( 'woocommerce_currency' );
    switch( $currency ) {
        case 'HRK': $symbol = 'Kn'; break;
    }
    return $symbol;
}