Checkbox WooCommerce插件，如何为多个产品向1个礼品盒收费

我的WooCommerce网站有问题

我目前拥有的是一个插件，它允许我为每个产品页面放置一个复选框，显示“将此产品添加到礼品盒？”。 这个篮子要花5欧元

问题是，如果客户希望在同一篮子中添加其他产品，他们必须单击该页面上的“将此产品添加到礼品盒？”复选框。 这将再增加5欧元。 这就是问题所在

我们的目标是保持1篮的价格，但同时 让人们可以选择添加更多产品，而不必为每种产品收取另一篮子费用，只需要一次

我正在使用的插件已经2年没有更新了，所以问这个问题几乎是死路一条

我使用的插件是“WooCommerce产品礼品包装”。 链接：

编码为：

<?php

*/

/** *本地化 */ 加载插件文本域（'woocommerce product gift wrap'，false，dirname（插件基本名称（文件）./languages/）

/** *WC_产品_礼品_包装类。 */ WC类\u产品\u礼品\u包装{

/**
 * Hook us in :)
 *
 * @access public
 * @return void
 */
public function __construct() {
    $default_message                 = '{checkbox} '. sprintf( __( 'Gift wrap this item for %s?', 'woocommerce-product-gift-wrap' ), '{price}' );
    $this->gift_wrap_enabled         = get_option( 'product_gift_wrap_enabled' ) == 'yes' ? true : false;
    $this->gift_wrap_cost            = get_option( 'product_gift_wrap_cost', 0 );
    $this->product_gift_wrap_message = get_option( 'product_gift_wrap_message' );

    if ( ! $this->product_gift_wrap_message ) {
        $this->product_gift_wrap_message = $default_message;
    }

    add_option( 'product_gift_wrap_enabled', 'no' );
    add_option( 'product_gift_wrap_cost', '0' );
    add_option( 'product_gift_wrap_message', $default_message );

    // Init settings
    $this->settings = array(
        array(
            'name'      => __( 'Gift Wrapping Enabled by Default?', 'woocommerce-product-gift-wrap' ),
            'desc'      => __( 'Enable this to allow gift wrapping for products by default.', 'woocommerce-product-gift-wrap' ),
            'id'        => 'product_gift_wrap_enabled',
            'type'      => 'checkbox',
        ),
        array(
            'name'      => __( 'Default Gift Wrap Cost', 'woocommerce-product-gift-wrap' ),
            'desc'      => __( 'The cost of gift wrap unless overridden per-product.', 'woocommerce-product-gift-wrap' ),
            'id'        => 'product_gift_wrap_cost',
            'type'      => 'text',
            'desc_tip'  => true
        ),
        array(
            'name'      => __( 'Gift Wrap Message', 'woocommerce-product-gift-wrap' ),
            'id'        => 'product_gift_wrap_message',
            'desc'      => __( 'Note: <code>{checkbox}</code> will be replaced with a checkbox and <code>{price}</code> will be replaced with the gift wrap cost.', 'woocommerce-product-gift-wrap' ),
            'type'      => 'text',
            'desc_tip'  => __( 'The checkbox and label shown to the user on the frontend.', 'woocommerce-product-gift-wrap' )
        ),
    );

    // Display on the front end
    add_action( 'woocommerce_after_add_to_cart_button', array( $this, 'gift_option_html' ), 10 );

    // Filters for cart actions
    add_filter( 'woocommerce_add_cart_item_data', array( $this, 'add_cart_item_data' ), 10, 2 );
    add_filter( 'woocommerce_get_cart_item_from_session', array( $this, 'get_cart_item_from_session' ), 10, 2 );
    add_filter( 'woocommerce_get_item_data', array( $this, 'get_item_data' ), 10, 2 );
    add_filter( 'woocommerce_add_cart_item', array( $this, 'add_cart_item' ), 10, 1 );
    add_action( 'woocommerce_add_order_item_meta', array( $this, 'add_order_item_meta' ), 10, 2 );

    // Write Panels
    add_action( 'woocommerce_product_options_pricing', array( $this, 'write_panel' ) );
    add_action( 'woocommerce_process_product_meta', array( $this, 'write_panel_save' ) );

    // Admin
    add_action( 'woocommerce_settings_general_options_end', array( $this, 'admin_settings' ) );
    add_action( 'woocommerce_update_options_general', array( $this, 'save_admin_settings' ) );
}

/**
 * Show the Gift Checkbox on the frontend
 *
 * @access public
 * @return void
 */
public function gift_option_html() {
    global $post;

    $is_wrappable = get_post_meta( $post->ID, '_is_gift_wrappable', true );

    if ( $is_wrappable == '' && $this->gift_wrap_enabled ) {
        $is_wrappable = 'yes';
    }

    if ( $is_wrappable == 'yes' ) {

        $current_value = ! empty( $_REQUEST['gift_wrap'] ) ? 1 : 0;

        $cost = get_post_meta( $post->ID, '_gift_wrap_cost', true );

        if ( $cost == '' ) {
            $cost = $this->gift_wrap_cost;
        }

        $price_text = $cost > 0 ? woocommerce_price( $cost ) : __( 'free', 'woocommerce-product-gift-wrap' );
        $checkbox   = '<input type="checkbox" name="gift_wrap" value="yes" ' . checked( $current_value, 1, false ) . ' />';

        woocommerce_get_template( 'gift-wrap.php', array(
            'product_gift_wrap_message' => $this->product_gift_wrap_message,
            'checkbox'                  => $checkbox,
            'price_text'                => $price_text
        ), 'woocommerce-product-gift-wrap', untrailingslashit( plugin_dir_path( __FILE__ ) ) . '/templates/' );
    }
}

/**
 * When added to cart, save any gift data
 *
 * @access public
 * @param mixed $cart_item_meta
 * @param mixed $product_id
 * @return void
 */
public function add_cart_item_data( $cart_item_meta, $product_id ) {
    $is_wrappable = get_post_meta( $product_id, '_is_gift_wrappable', true );

    if ( $is_wrappable == '' && $this->gift_wrap_enabled ) {
        $is_wrappable = 'yes';
    }

    if ( ! empty( $_POST['gift_wrap'] ) && $is_wrappable == 'yes' ) {
        $cart_item_meta['gift_wrap'] = true;
    }

    return $cart_item_meta;
}

/**
 * Get the gift data from the session on page load
 *
 * @access public
 * @param mixed $cart_item
 * @param mixed $values
 * @return void
 */
public function get_cart_item_from_session( $cart_item, $values ) {

    if ( ! empty( $values['gift_wrap'] ) ) {
        $cart_item['gift_wrap'] = true;

        $cost = get_post_meta( $cart_item['data']->id, '_gift_wrap_cost', true );

        if ( $cost == '' ) {
            $cost = $this->gift_wrap_cost;
        }

        $cart_item['data']->adjust_price( $cost );
    }

    return $cart_item;
}

/**
 * Display gift data if present in the cart
 *
 * @access public
 * @param mixed $other_data
 * @param mixed $cart_item
 * @return void
 */
public function get_item_data( $item_data, $cart_item ) {
    if ( ! empty( $cart_item['gift_wrap'] ) )
        $item_data[] = array(
            'name'    => __( 'In geschenkmand', 'woocommerce-product-gift-wrap' ),
            'value'   => __( 'Yes', 'woocommerce-product-gift-wrap' ),
            'display' => __( 'Ja', 'woocommerce-product-gift-wrap' )
        );

    return $item_data;
}

/**
 * Adjust price after adding to cart
 *
 * @access public
 * @param mixed $cart_item
 * @return void
 */
public function add_cart_item( $cart_item ) {
    if ( ! empty( $cart_item['gift_wrap'] ) ) {

        $cost = get_post_meta( $cart_item['data']->id, '_gift_wrap_cost', true );

        if ( $cost == '' ) {
            $cost = $this->gift_wrap_cost;
        }

        $cart_item['data']->adjust_price( $cost );
    }

    return $cart_item;
}

/**
 * After ordering, add the data to the order line items.
 *
 * @access public
 * @param mixed $item_id
 * @param mixed $values
 * @return void
 */
public function add_order_item_meta( $item_id, $cart_item ) {
    if ( ! empty( $cart_item['gift_wrap'] ) ) {
        woocommerce_add_order_item_meta( $item_id, __( 'In geschenkmand', 'woocommerce-product-gift-wrap' ), __( 'Ja', 'woocommerce-product-gift-wrap' ) );
    }
}

/**
 * write_panel function.
 *
 * @access public
 * @return void
 */
public function write_panel() {
    global $post;

    echo '</div><div class="options_group show_if_simple show_if_variable">';

    $is_wrappable = get_post_meta( $post->ID, '_is_gift_wrappable', true );

    if ( $is_wrappable == '' && $this->gift_wrap_enabled ) {
        $is_wrappable = 'yes';
    }

    woocommerce_wp_checkbox( array(
            'id'            => '_is_gift_wrappable',
            'wrapper_class' => '',
            'value'         => $is_wrappable,
            'label'         => __( 'Gift Wrappable', 'woocommerce-product-gift-wrap' ),
            'description'   => __( 'Enable this option if the customer can choose gift wrapping.', 'woocommerce-product-gift-wrap' ),
        ) );

    woocommerce_wp_text_input( array(
            'id'          => '_gift_wrap_cost',
            'label'       => __( 'Gift Wrap Cost', 'woocommerce-product-gift-wrap' ),
            'placeholder' => $this->gift_wrap_cost,
            'desc_tip'    => true,
            'description' => __( 'Override the default cost by inputting a cost here.', 'woocommerce-product-gift-wrap' ),
        ) );

    wc_enqueue_js( "
        jQuery('input#_is_gift_wrappable').change(function(){

            jQuery('._gift_wrap_cost_field').hide();

            if ( jQuery('#_is_gift_wrappable').is(':checked') ) {
                jQuery('._gift_wrap_cost_field').show();
            }

        }).change();
    " );
}

/**
 * write_panel_save function.
 *
 * @access public
 * @param mixed $post_id
 * @return void
 */
public function write_panel_save( $post_id ) {
    $_is_gift_wrappable = ! empty( $_POST['_is_gift_wrappable'] ) ? 'yes' : 'no';
    $_gift_wrap_cost   = ! empty( $_POST['_gift_wrap_cost'] ) ? woocommerce_clean( $_POST['_gift_wrap_cost'] ) : '';

    update_post_meta( $post_id, '_is_gift_wrappable', $_is_gift_wrappable );
    update_post_meta( $post_id, '_gift_wrap_cost', $_gift_wrap_cost );
}

/**
 * admin_settings function.
 *
 * @access public
 * @return void
 */
public function admin_settings() {
    woocommerce_admin_fields( $this->settings );
}

/**
 * save_admin_settings function.
 *
 * @access public
 * @return void
 */
public function save_admin_settings() {
    woocommerce_update_options( $this->settings );
}

}

新WC_产品_礼品_包装（）

如果有人能帮我，我将非常感激

提前感谢,

林恩

/**
 * Hook us in :)
 *
 * @access public
 * @return void
 */
public function __construct() {
    $default_message                 = '{checkbox} '. sprintf( __( 'Gift wrap this item for %s?', 'woocommerce-product-gift-wrap' ), '{price}' );
    $this->gift_wrap_enabled         = get_option( 'product_gift_wrap_enabled' ) == 'yes' ? true : false;
    $this->gift_wrap_cost            = get_option( 'product_gift_wrap_cost', 0 );
    $this->product_gift_wrap_message = get_option( 'product_gift_wrap_message' );

    if ( ! $this->product_gift_wrap_message ) {
        $this->product_gift_wrap_message = $default_message;
    }

    add_option( 'product_gift_wrap_enabled', 'no' );
    add_option( 'product_gift_wrap_cost', '0' );
    add_option( 'product_gift_wrap_message', $default_message );

    // Init settings
    $this->settings = array(
        array(
            'name'      => __( 'Gift Wrapping Enabled by Default?', 'woocommerce-product-gift-wrap' ),
            'desc'      => __( 'Enable this to allow gift wrapping for products by default.', 'woocommerce-product-gift-wrap' ),
            'id'        => 'product_gift_wrap_enabled',
            'type'      => 'checkbox',
        ),
        array(
            'name'      => __( 'Default Gift Wrap Cost', 'woocommerce-product-gift-wrap' ),
            'desc'      => __( 'The cost of gift wrap unless overridden per-product.', 'woocommerce-product-gift-wrap' ),
            'id'        => 'product_gift_wrap_cost',
            'type'      => 'text',
            'desc_tip'  => true
        ),
        array(
            'name'      => __( 'Gift Wrap Message', 'woocommerce-product-gift-wrap' ),
            'id'        => 'product_gift_wrap_message',
            'desc'      => __( 'Note: <code>{checkbox}</code> will be replaced with a checkbox and <code>{price}</code> will be replaced with the gift wrap cost.', 'woocommerce-product-gift-wrap' ),
            'type'      => 'text',
            'desc_tip'  => __( 'The checkbox and label shown to the user on the frontend.', 'woocommerce-product-gift-wrap' )
        ),
    );

    // Display on the front end
    add_action( 'woocommerce_after_add_to_cart_button', array( $this, 'gift_option_html' ), 10 );

    // Filters for cart actions
    add_filter( 'woocommerce_add_cart_item_data', array( $this, 'add_cart_item_data' ), 10, 2 );
    add_filter( 'woocommerce_get_cart_item_from_session', array( $this, 'get_cart_item_from_session' ), 10, 2 );
    add_filter( 'woocommerce_get_item_data', array( $this, 'get_item_data' ), 10, 2 );
    add_filter( 'woocommerce_add_cart_item', array( $this, 'add_cart_item' ), 10, 1 );
    add_action( 'woocommerce_add_order_item_meta', array( $this, 'add_order_item_meta' ), 10, 2 );

    // Write Panels
    add_action( 'woocommerce_product_options_pricing', array( $this, 'write_panel' ) );
    add_action( 'woocommerce_process_product_meta', array( $this, 'write_panel_save' ) );

    // Admin
    add_action( 'woocommerce_settings_general_options_end', array( $this, 'admin_settings' ) );
    add_action( 'woocommerce_update_options_general', array( $this, 'save_admin_settings' ) );
}

/**
 * Show the Gift Checkbox on the frontend
 *
 * @access public
 * @return void
 */
public function gift_option_html() {
    global $post;

    $is_wrappable = get_post_meta( $post->ID, '_is_gift_wrappable', true );

    if ( $is_wrappable == '' && $this->gift_wrap_enabled ) {
        $is_wrappable = 'yes';
    }

    if ( $is_wrappable == 'yes' ) {

        $current_value = ! empty( $_REQUEST['gift_wrap'] ) ? 1 : 0;

        $cost = get_post_meta( $post->ID, '_gift_wrap_cost', true );

        if ( $cost == '' ) {
            $cost = $this->gift_wrap_cost;
        }

        $price_text = $cost > 0 ? woocommerce_price( $cost ) : __( 'free', 'woocommerce-product-gift-wrap' );
        $checkbox   = '<input type="checkbox" name="gift_wrap" value="yes" ' . checked( $current_value, 1, false ) . ' />';

        woocommerce_get_template( 'gift-wrap.php', array(
            'product_gift_wrap_message' => $this->product_gift_wrap_message,
            'checkbox'                  => $checkbox,
            'price_text'                => $price_text
        ), 'woocommerce-product-gift-wrap', untrailingslashit( plugin_dir_path( __FILE__ ) ) . '/templates/' );
    }
}

/**
 * When added to cart, save any gift data
 *
 * @access public
 * @param mixed $cart_item_meta
 * @param mixed $product_id
 * @return void
 */
public function add_cart_item_data( $cart_item_meta, $product_id ) {
    $is_wrappable = get_post_meta( $product_id, '_is_gift_wrappable', true );

    if ( $is_wrappable == '' && $this->gift_wrap_enabled ) {
        $is_wrappable = 'yes';
    }

    if ( ! empty( $_POST['gift_wrap'] ) && $is_wrappable == 'yes' ) {
        $cart_item_meta['gift_wrap'] = true;
    }

    return $cart_item_meta;
}

/**
 * Get the gift data from the session on page load
 *
 * @access public
 * @param mixed $cart_item
 * @param mixed $values
 * @return void
 */
public function get_cart_item_from_session( $cart_item, $values ) {

    if ( ! empty( $values['gift_wrap'] ) ) {
        $cart_item['gift_wrap'] = true;

        $cost = get_post_meta( $cart_item['data']->id, '_gift_wrap_cost', true );

        if ( $cost == '' ) {
            $cost = $this->gift_wrap_cost;
        }

        $cart_item['data']->adjust_price( $cost );
    }

    return $cart_item;
}

/**
 * Display gift data if present in the cart
 *
 * @access public
 * @param mixed $other_data
 * @param mixed $cart_item
 * @return void
 */
public function get_item_data( $item_data, $cart_item ) {
    if ( ! empty( $cart_item['gift_wrap'] ) )
        $item_data[] = array(
            'name'    => __( 'In geschenkmand', 'woocommerce-product-gift-wrap' ),
            'value'   => __( 'Yes', 'woocommerce-product-gift-wrap' ),
            'display' => __( 'Ja', 'woocommerce-product-gift-wrap' )
        );

    return $item_data;
}

/**
 * Adjust price after adding to cart
 *
 * @access public
 * @param mixed $cart_item
 * @return void
 */
public function add_cart_item( $cart_item ) {
    if ( ! empty( $cart_item['gift_wrap'] ) ) {

        $cost = get_post_meta( $cart_item['data']->id, '_gift_wrap_cost', true );

        if ( $cost == '' ) {
            $cost = $this->gift_wrap_cost;
        }

        $cart_item['data']->adjust_price( $cost );
    }

    return $cart_item;
}

/**
 * After ordering, add the data to the order line items.
 *
 * @access public
 * @param mixed $item_id
 * @param mixed $values
 * @return void
 */
public function add_order_item_meta( $item_id, $cart_item ) {
    if ( ! empty( $cart_item['gift_wrap'] ) ) {
        woocommerce_add_order_item_meta( $item_id, __( 'In geschenkmand', 'woocommerce-product-gift-wrap' ), __( 'Ja', 'woocommerce-product-gift-wrap' ) );
    }
}

/**
 * write_panel function.
 *
 * @access public
 * @return void
 */
public function write_panel() {
    global $post;

    echo '</div><div class="options_group show_if_simple show_if_variable">';

    $is_wrappable = get_post_meta( $post->ID, '_is_gift_wrappable', true );

    if ( $is_wrappable == '' && $this->gift_wrap_enabled ) {
        $is_wrappable = 'yes';
    }

    woocommerce_wp_checkbox( array(
            'id'            => '_is_gift_wrappable',
            'wrapper_class' => '',
            'value'         => $is_wrappable,
            'label'         => __( 'Gift Wrappable', 'woocommerce-product-gift-wrap' ),
            'description'   => __( 'Enable this option if the customer can choose gift wrapping.', 'woocommerce-product-gift-wrap' ),
        ) );

    woocommerce_wp_text_input( array(
            'id'          => '_gift_wrap_cost',
            'label'       => __( 'Gift Wrap Cost', 'woocommerce-product-gift-wrap' ),
            'placeholder' => $this->gift_wrap_cost,
            'desc_tip'    => true,
            'description' => __( 'Override the default cost by inputting a cost here.', 'woocommerce-product-gift-wrap' ),
        ) );

    wc_enqueue_js( "
        jQuery('input#_is_gift_wrappable').change(function(){

            jQuery('._gift_wrap_cost_field').hide();

            if ( jQuery('#_is_gift_wrappable').is(':checked') ) {
                jQuery('._gift_wrap_cost_field').show();
            }

        }).change();
    " );
}

/**
 * write_panel_save function.
 *
 * @access public
 * @param mixed $post_id
 * @return void
 */
public function write_panel_save( $post_id ) {
    $_is_gift_wrappable = ! empty( $_POST['_is_gift_wrappable'] ) ? 'yes' : 'no';
    $_gift_wrap_cost   = ! empty( $_POST['_gift_wrap_cost'] ) ? woocommerce_clean( $_POST['_gift_wrap_cost'] ) : '';

    update_post_meta( $post_id, '_is_gift_wrappable', $_is_gift_wrappable );
    update_post_meta( $post_id, '_gift_wrap_cost', $_gift_wrap_cost );
}

/**
 * admin_settings function.
 *
 * @access public
 * @return void
 */
public function admin_settings() {
    woocommerce_admin_fields( $this->settings );
}

/**
 * save_admin_settings function.
 *
 * @access public
 * @return void
 */
public function save_admin_settings() {
    woocommerce_update_options( $this->settings );
}