php - WooCommerce:在任何地方添加/显示产品或变体自定义字段

Question

目前使用 WordPress 5.1.1 和 WooCommerce 3.5.7。我的 WooCommerce 商店有大约 500 种产品，由简单和可变的产品组成。

每个产品自然有一个SKU，但每个产品也有一个唯一的ID代码，称为“商品代码”。我向特定行业销售特定产品。

我已经在我的 functions.php 文件中添加了用于简单和可变产品的自定义字段的代码，目前效果很好。

我的问题是，我试图让“商品代码”出现在购物车、结帐、发票和电子邮件中的产品标题下。

我已经阅读了互联网上的各种教程来帮助我，但我并不聪明，因为每个教程都以不同的方式做类似的事情。大多数教程假设用户已经通过前端输入数据，但我的数据是预设的。

我用来帮助我的教程是:

• https://businessbloomer.com/woocommerce-add-custom-field-product-variation/
• https://www.liquidweb.com/blog/custom-fields-woocommerce-products/
• https://www.tychesoftwares.com/how-to-add-custom-fields-to-woocommerce-products-subsequently-through-the-order-cycle/

<?php
// Add WooCommerce Custom Field for Commodity Code
function vp_add_commodity_code() {
  $args = array(
    'id' => 'vp_commodity_code',
    'label' => __( 'Commodity Code', 'woocommerce' ),
    'placeholder' => __( 'Enter Commodity Code here', 'woocommerce' ),
    'desc_tip' => true,
    'description' => __( 'This field is for the Commodity Code of the product.', 'woocommerce' ),
  );
  woocommerce_wp_text_input( $args );
}
add_action( 'woocommerce_product_options_sku', 'vp_add_commodity_code' );


// Save Commodity Code into WooCommerce Database
function vp_save_commodity_code( $post_id ) {
  // grab the Commodity Code
  $sku = isset( $_POST[ 'vp_commodity_code' ] ) ? sanitize_text_field( $_POST[ 'vp_commodity_code' ] ) : '';

  // grab the product
  $product = wc_get_product( $post_id );

  // save the Commodity Code custom field
  $product->update_meta_data( 'vp_commodity_code', $sku );
  $product->save();
}
add_action( 'woocommerce_process_product_meta', 'vp_save_commodity_code' );

// Display Commodity Code on the Frontend
function vp_display_commodity_code() {
    global $post;
    // Check for the Commodity Code value
    $product = wc_get_product( $post->ID );
    $title = $product->get_meta( 'vp_commodity_code' );
    if( $title ) {
    // Only display the field if we've got a value for the field title
    printf(
    '<div class="vpcommoditycode-wrapper"><strong>Commodity Code: </strong>%s</div>',
    esc_html( $title )
    );
    }
   }
   add_action( 'woocommerce_before_add_to_cart_button', 'vp_display_commodity_code' );


// Add custom field input @ Product Data > Variations > Single Variation

add_action( 'woocommerce_variation_options_pricing', 'comcode_add_custom_field_to_variations', 10, 3 ); 

function comcode_add_custom_field_to_variations( $loop, $variation_data, $variation ) {
woocommerce_wp_text_input( array(
    'id' => 'custom_field[' . $loop . ']',
    'class' => 'short',
    'label' => __( 'Community Code', 'woocommerce' ),
    'value' => get_post_meta( $variation->ID, 'custom_field', true ),
    'placeholder' => __( 'Enter Commodity Code here', 'woocommerce' ),
    'desc_tip' => true,
    'description' => __( 'This field is for the Commodity Code of the product.', 'woocommerce' ),
)
);
}

// Save custom field on product variation

add_action( 'woocommerce_save_product_variation', 'comcode_save_custom_field_variations', 10, 2 );

function comcode_save_custom_field_variations( $variation_id, $i ) {
$custom_field = $_POST['custom_field'][$i];
if ( isset( $custom_field ) ) update_post_meta( $variation_id, 'custom_field', esc_attr( $custom_field ) );
}

// Store custom field value into variation data

add_filter( 'woocommerce_available_variation', 'comcode_add_custom_field_variation_data' );

function comcode_add_custom_field_variation_data( $variations ) {
$variations['custom_field'] = '<div class="woocommerce_custom_field"><strong>Commodity Code: </strong><span>' . get_post_meta( $variations[ 'variation_id' ], 'custom_field', true ) . '</span></div>';
return $variations;
}
?>

一些 PHP/WooCommerce 天才可以通过提供代码或指向一个可以帮助我的教程或命名一个第三方 WordPress 插件来帮助我。

Answer 1

我已经重新访问并完成了您现有的代码，例如它不适用于产品变体……这将:

• 在库存选项卡下的管理产品上显示自定义字段
• 在每个变体的变体选项卡下显示管理产品的自定义字段
• 保存产品和产品变体的自定义字段值
• 在单个产品页面上显示自定义字段值(也适用于每个选定的变体)
• 在购物车和结帐页面上显示自定义字段值
• 将自定义字段值保存为订单项元数据
• 在管理员订单上显示自定义字段值
• 在订单和电子邮件通知中显示自定义字段

代码:

// Admin: Add custom field
add_action('woocommerce_product_options_sku', 'vp_add_commodity_code' );
function vp_add_commodity_code(){

    woocommerce_wp_text_input( array(
        'id'          => '_commodity_code',
        'label'       => __('Commodity Code', 'woocommerce' ),
        'placeholder' => __('Enter Commodity Code here', 'woocommerce' ),
        'desc_tip'    => true,
        'description' => __('This field is for the Commodity Code of the product.', 'woocommerce' ),
    ) );
}

// Admin: Save custom field value for simple product inventory options
add_action('woocommerce_admin_process_product_object', 'vp_product_save_commodity_code', 10, 1 );
function vp_product_save_commodity_code( $product ){
    if( isset($_POST['_commodity_code']) )
        $product->update_meta_data( '_commodity_code', sanitize_text_field($_POST['_commodity_code']) );
}

// Admin: Add custom field in product variations options pricing
add_action( 'woocommerce_variation_options_pricing', 'vp_add_variation_commodity_code', 10, 3 );
function vp_add_variation_commodity_code( $loop, $variation_data, $variation ){

   woocommerce_wp_text_input( array(
        'id'          => '_commodity_code['.$loop.']',
        'label'       => __('Commodity Code', 'woocommerce' ),
        'placeholder' => __('Enter Commodity Code here', 'woocommerce' ),
        'desc_tip'    => true,
        'description' => __('This field is for the Commodity Code of the product.', 'woocommerce' ),
        'value'       => get_post_meta( $variation->ID, '_commodity_code', true )
    ) );
}

// Admin: Save custom field value from product variations options pricing
add_action( 'woocommerce_save_product_variation', 'save_barcode_variations', 10, 2 );
function save_barcode_variations( $variation_id, $i ){
    if( isset($_POST['_commodity_code'][$i]) ){
        update_post_meta( $variation_id, '_commodity_code', sanitize_text_field($_POST['_commodity_code'][$i]) );
    }
}

// Frontend: Display Commodity Code on product
add_action( 'woocommerce_before_add_to_cart_button', 'vp_product_display_commodity_code' );
function vp_product_display_commodity_code() {
    global $product;

    if( $value = $product->get_meta( '_commodity_code' ) ) {
        echo '<div class="vp-ccode-wrapper"><strong>' . __("Commodity Code", "woocommerce") .
        ': </strong>'.esc_html( $value ).'</div>';
    }
}

// Frontend: Display Commodity Code on product variations
add_filter( 'woocommerce_available_variation', 'vp_variation_display_commodity_code', 10, 3 );
function vp_variation_display_commodity_code( $data, $product, $variation ) {

    if( $value = $variation->get_meta( '_commodity_code' ) ) {
        $data['price_html'] .= '<p class="vp-ccode"><small><strong>' . __("Commodity Code", "woocommerce") .
        ': </strong>'.esc_html( $value ).'</small></p>';
    }

    return $data;
}

// Frontend: Display Commodity Code on cart
add_filter( 'woocommerce_cart_item_name', 'vp_cart_display_commodity_code', 10, 3 );
function vp_cart_display_commodity_code( $item_name, $cart_item, $cart_item_key ) {
    if( ! is_cart() )
        return $item_name;

    if( $value = $cart_item['data']->get_meta('_commodity_code') ) {
        $item_name .= '<br><small class="vp-ccode"><strong>' . __("Commodity Code", "woocommerce") .
            ':</strong> ' . esc_html( $value ) . '</small>';
    }
    return $item_name;
}

// Frontend: Display Commodity Code on checkout
add_filter( 'woocommerce_checkout_cart_item_quantity', 'vp_checkout_display_commodity_code', 10, 3 );
function vp_checkout_display_commodity_code( $item_qty, $cart_item, $cart_item_key ) {
    if( $value = $cart_item['data']->get_meta('_commodity_code') ) {
        $item_qty .= '<br><small class="vp-ccode"><strong>' . __("Commodity Code", "woocommerce") .
            ':</strong> ' . esc_html( $value ) . '</small>';
    }
    return $item_qty;
}

// Save Commodity Code to order items (and display it on admin orders)
add_filter( 'woocommerce_checkout_create_order_line_item', 'vp_order_item_save_commodity_code', 10, 4 );
function vp_order_item_save_commodity_code( $item, $cart_item_key, $cart_item, $order ) {
    if( $value = $cart_item['data']->get_meta('_commodity_code') ) {
        $item->update_meta_data( '_commodity_code', esc_attr( $value ) );
    }
    return $item_qty;
}

// Frontend & emails: Display Commodity Code on orders
add_action( 'woocommerce_order_item_meta_start', 'vp_order_item_display_commodity_code', 10, 4 );
function vp_order_item_display_commodity_code( $item_id, $item, $order, $plain_text ) {
    // Not on admin
    //if( is_admin() ) return;

    if( $value = $item->get_meta('_commodity_code') ) {
        $value = '<strong>' . __("Commodity Code", "woocommerce") . ':</strong> ' . esc_attr( $value );

        // On orders
        if( is_wc_endpoint_url() )
            echo '<div class="vp-ccode"><small>' . $value . '</small></div>';
        // On Emails
        else
            echo '<div style="font-size:11px;padding-top:6px">' . $value . '</div>';
    }
}

代码进入事件子主题(或事件主题)的 function.php 文件。经过测试并有效。