function edd_ajax_add_to_cart() {
  if ( ! isset( $_POST['download_id'] ) ) {
    edd_die();
  }

  $download_id = absint( $_POST['download_id'] );
  $request_validated = false;
  if ( isset( $_POST['timestamp'] ) && isset( $_POST['token'] ) && EDD\Utils\Tokenizer::is_token_valid( $_POST['token'], $_POST['timestamp'] ) ) {
    $request_validated = true;
  } elseif ( isset( $_POST['nonce'] ) && wp_verify_nonce( $_POST['nonce'], 'edd-add-to-cart-' . $download_id ) ) {
    $request_validated = true;
  }

  if ( ! $request_validated ) {
    edd_debug_log( __( 'Missing nonce when adding an item to the cart. Please read the following for more information: https://easydigitaldownloads.com/development/2018/07/05/important-update-to-ajax-requests-in-easy-digital-downloads-2-9-4', 'easy-digital-downloads' ), true );
    edd_die( '', '', 403 );
  }

  $to_add = array();

  if ( isset( $_POST['price_ids'] ) && is_array( $_POST['price_ids'] ) ) {
    foreach ( $_POST['price_ids'] as $price ) {
      $to_add[] = array( 'price_id' => $price );
    }
  }

  $items = '';

  if ( isset( $_POST['post_data'] ) ) {
    parse_str( $_POST['post_data'], $post_data );
  } else {
    $post_data = array();
  }

  foreach ( $to_add as $options ) {

    if( $_POST['download_id'] == $options['price_id'] ) {
      $options = array();
    }

    if( isset( $options['price_id'] ) && isset( $post_data['edd_download_quantity_' . $options['price_id'] ] ) ) {

      $options['quantity'] = absint( $post_data['edd_download_quantity_' . $options['price_id'] ] );

    } else {

      $options['quantity'] = isset( $post_data['edd_download_quantity'] ) ? absint( $post_data['edd_download_quantity'] ) : 1;

    }

    $key = edd_add_to_cart( $_POST['download_id'], $options );

    $item = array(
      'id'      => $_POST['download_id'],
      'options' => $options
    );

    $item   = apply_filters( 'edd_ajax_pre_cart_item_template', $item );
    $items .= html_entity_decode( edd_get_cart_item_template( $key, $item, true ), ENT_COMPAT, 'UTF-8' );

  }

  $return = array(
    'subtotal'      => html_entity_decode( edd_currency_filter( edd_format_amount( edd_get_cart_subtotal() ) ), ENT_COMPAT, 'UTF-8' ),
    'total'         => html_entity_decode( edd_currency_filter( edd_format_amount( edd_get_cart_total() ) ), ENT_COMPAT, 'UTF-8' ),
    'cart_item'     => $items,
    'cart_quantity' => html_entity_decode( edd_get_cart_quantity() )
  );

  if ( edd_use_taxes() ) {
    $cart_tax = (float) edd_get_cart_tax();
    $return['tax'] = html_entity_decode( edd_currency_filter( edd_format_amount( $cart_tax ) ), ENT_COMPAT, 'UTF-8' );
  }

  $return = apply_filters( 'edd_ajax_add_to_cart_response', $return );

  echo json_encode( $return );
  edd_die();
}