Woocommerce 单一产品自定义选项卡上显示带有所见即所得字段的元框

需要在单个产品页面上显示相关产品中的自定义字段。

我想添加一个元框到Add New Product字段并在评论下的单个产品页面上的自定义选项卡上显示结果。我尝试使用代码，但页面上没有显示任何内容。添加额外的产品选项卡可以帮助我添加额外的信息。所以添加、保存和显示产品就是我正在寻找的。

add_filter( 'add_meta_boxes', 'bhww_core_cpt_metaboxes' );

function bhww_core_cpt_metaboxes( $meta_boxes ) {

    //global $prefix;
    $prefix = '_bhww_'; // Prefix for all fields

    // Add metaboxes to the 'Product' CPT
    $meta_boxes[] = array(
        'id'         => 'bhww_woo_tabs_metabox',
        'title'      => 'Additional Product Information - <strong>Optional</strong>',
        'pages'      => array( 'product' ), // Which post type to associate with?
        'context'    => 'normal',
        'priority'   => 'default',
        'show_names' => true,                   
        'fields'     => array(
            array(
                'name'    => __( 'Ingredients', 'cmb' ),
                'desc'    => __( 'Anything you enter here will be displayed on the Ingredients tab.', 'cmb' ),
                'id'      => $prefix . 'ingredients_wysiwyg',
                'type'    => 'wysiwyg',
                'options' => array( 'textarea_rows' => 5, ),
            ),
            array(
                'name'    => __( 'Benefits', 'cmb' ),
                'desc'    => __( 'Anything you enter here will be displayed on the Benefits tab.', 'cmb' ),
                'id'      => $prefix . 'benefits_wysiwyg',
                'type'    => 'wysiwyg',
                'options' => array( 'textarea_rows' => 5, ),
            ),
        ),
    );

    return $meta_boxes;

}

/////////////////////////////////////////

add_filter( 'woocommerce_product_data_tabs', 'bhww_woo_extra_tabs' );

function bhww_woo_extra_tabs( $tabs1 ) {

    global $post;
    $product_ingredients = get_post_meta( $post->ID, '_bhww_ingredients_wysiwyg', true );
    $product_benefits    = get_post_meta( $post->ID, '_bhww_benefits_wysiwyg', true );

    if ( ! empty( $product_ingredients ) ) {

        $tabs1['ingredients_tab'] = array(
            'title'    => __( 'Ingredients', 'woocommerce' ),
            'priority' => 15,
            'callback' => 'bhww_woo_ingredients_tab_content'
        );

    }

    if ( ! empty( $product_benefits ) ) {

        $tabs1['benefits_tab'] = array(
            'title'    => __( 'Benefits', 'woocommerce' ),
            'priority' => 16,
            'callback' => 'bhww_woo_benefits_tab_content'
        );

    }

    return $tabs1;

}

function bhww_woo_ingredients_tab_content() {

    global $post;
    $product_ingredients = get_post_meta( $post->ID, '_bhww_ingredients_wysiwyg', true );

    if ( ! empty( $product_ingredients ) ) {

        echo '<h2>' . esc_html__( 'Product Ingredients', 'woocommerce' ) . '</h2>';

        // Updated to apply the_content filter to WYSIWYG content
        echo apply_filters( 'the_content', $product_ingredients );

    }

}

function bhww_woo_benefits_tab_content() {

    global $post;
    $product_benefits = get_post_meta( $post->ID, '_bhww_benefits_wysiwyg', true );

    if ( ! empty( $product_benefits ) ) {

        echo '<h2>' . esc_html__( 'Product Benefits', 'woocommerce' ) . '</h2>';

        // Updated to apply the_content filter to WYSIWYG content
        echo apply_filters( 'the_content', $product_benefits );

    }

}

以下是在管理编辑产品页面中添加 2 个自定义字段（编辑器所见即所得）并在前端单个产品页面自定义选项卡中显示值的方法：

## ---- 1. Backend ---- ##

// Adding a custom Meta container to admin products pages
add_action( 'add_meta_boxes', 'create_custom_meta_box' );
if ( ! function_exists( 'create_custom_meta_box' ) )
{
    function create_custom_meta_box()
    {
        add_meta_box(
            'custom_product_meta_box',
            __( 'Additional Product Information <em>(optional)</em>', 'cmb' ),
            'add_custom_content_meta_box',
            'product',
            'normal',
            'default'
        );
    }
}

//  Custom metabox content in admin product pages
if ( ! function_exists( 'add_custom_content_meta_box' ) ){
    function add_custom_content_meta_box( $post ){
        $prefix = '_bhww_'; // global $prefix;

        $ingredients = get_post_meta($post->ID, $prefix.'ingredients_wysiwyg', true) ? get_post_meta($post->ID, $prefix.'ingredients_wysiwyg', true) : '';
        $benefits = get_post_meta($post->ID, $prefix.'benefits_wysiwyg', true) ? get_post_meta($post->ID, $prefix.'benefits_wysiwyg', true) : '';
        $args['textarea_rows'] = 6;

        echo '<p>'.__( 'Ingredients', 'cmb' ).'</p>';
        wp_editor( $ingredients, 'ingredients_wysiwyg', $args );

        echo '<p>'.__( 'Benefits', 'cmb' ).'</p>';
        wp_editor( $benefits, 'benefits_wysiwyg', $args );

        echo '<input type="hidden" name="custom_product_field_nonce" value="' . wp_create_nonce() . '">';
    }
}



//Save the data of the Meta field
add_action( 'save_post', 'save_custom_content_meta_box', 10, 1 );
if ( ! function_exists( 'save_custom_content_meta_box' ) )
{

    function save_custom_content_meta_box( $post_id ) {
        $prefix = '_bhww_'; // global $prefix;

        // We need to verify this with the proper authorization (security stuff).

        // Check if our nonce is set.
        if ( ! isset( $_POST[ 'custom_product_field_nonce' ] ) ) {
            return $post_id;
        }
        $nonce = $_REQUEST[ 'custom_product_field_nonce' ];

        //Verify that the nonce is valid.
        if ( ! wp_verify_nonce( $nonce ) ) {
            return $post_id;
        }

        // If this is an autosave, our form has not been submitted, so we don't want to do anything.
        if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
            return $post_id;
        }

        // Check the user's permissions.
        if ( 'product' == $_POST[ 'post_type' ] ){
            if ( ! current_user_can( 'edit_product', $post_id ) )
                return $post_id;
        } else {
            if ( ! current_user_can( 'edit_post', $post_id ) )
                return $post_id;
        }

        // Sanitize user input and update the meta field in the database.
        update_post_meta( $post_id, $prefix.'ingredients_wysiwyg', wp_kses_post($_POST[ 'ingredients_wysiwyg' ]) );
        update_post_meta( $post_id, $prefix.'benefits_wysiwyg', wp_kses_post($_POST[ 'benefits_wysiwyg' ]) );
    }
}

## ---- 2. Front-end ---- ##

// Create custom tabs in product single pages
add_filter( 'woocommerce_product_tabs', 'custom_product_tabs' );
function custom_product_tabs( $tabs ) {
    global $post;

    $product_ingredients = get_post_meta( $post->ID, '_bhww_ingredients_wysiwyg', true );
    $product_benefits    = get_post_meta( $post->ID, '_bhww_benefits_wysiwyg', true );

    if ( ! empty( $product_ingredients ) )
        $tabs['ingredients_tab'] = array(
            'title'    => __( 'Ingredients', 'woocommerce' ),
            'priority' => 45,
            'callback' => 'ingredients_product_tab_content'
        );

    if ( ! empty( $product_benefits ) )
        $tabs['benefits_tab'] = array(
            'title'    => __( 'Benefits', 'woocommerce' ),
            'priority' => 50,
            'callback' => 'benefits_product_tab_content'
        );

    return $tabs;
}

// Add content to custom tab in product single pages (1)
function ingredients_product_tab_content() {
    global $post;

    $product_ingredients = get_post_meta( $post->ID, '_bhww_ingredients_wysiwyg', true );

    if ( ! empty( $product_ingredients ) ) {
        echo '<h2>' . __( 'Product Ingredients', 'woocommerce' ) . '</h2>';

        // Updated to apply the_content filter to WYSIWYG content
        echo apply_filters( 'the_content', $product_ingredients );
    }
}

// Add content to custom tab in product single pages (2)
function benefits_product_tab_content() {
    global $post;

    $product_benefits = get_post_meta( $post->ID, '_bhww_benefits_wysiwyg', true );

    if ( ! empty( $product_benefits ) ) {
        echo '<h2>' . __( 'Product Benefits', 'woocommerce' ) . '</h2>';

        // Updated to apply the_content filter to WYSIWYG content
        echo apply_filters( 'the_content', $product_benefits );
    }
}

代码位于活动子主题（或主题）的 function.php 文件中或任何插件文件中。

经过测试并有效。你会得到：

1）在后台：

2）在前端：