WooCommerce: Change Add To Cart Text

/**
 * Change the add to cart text on single product pages
 */
function woo_custom_cart_button_text() {

  global $woocommerce;
	
  foreach ( $woocommerce->cart->get_cart() as $cart_item_key => $values ) {
    $_product = $values['data'];
	
    if( get_the_ID() == $_product->id ) {
      return __( 'Already in cart - Add Again?', 'woocommerce' );
    }
  }
  return __( 'Add to cart', 'woocommerce' );
}
add_filter( 'single_add_to_cart_text', 'woo_custom_cart_button_text' );

/**
 * Change the add to cart text on product archives
 */
function woo_archive_custom_cart_button_text() {

  global $woocommerce;
	
  foreach ( $woocommerce->cart->get_cart() as $cart_item_key => $values ) {
    $_product = $values['data'];
	
    if( get_the_ID() == $_product->id ) {
      return __( 'Already in cart', 'woocommerce' );
    }
  }
  return __('Add to cart', 'woocommerce');
}
add_filter( 'add_to_cart_text', 'woo_archive_custom_cart_button_text' );