PROSAGA码农传奇-Xedge-保存自定义结帐字段并将其显示在管理员Woocommerce订单中

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    以下是在订单中保存所有相关自定义结帐值的正确方法，并按照结算明细下面的编辑页面显示它们：
  
   <pre>
 <code>
 // Add checkout custom text fields
add_action( 'woocommerce_before_order_notes', 'add_checkout_custom_text_fields', 20, 1 );
function add_checkout_custom_text_fields( $checkout) {
 $index = 0;

// 1st Loop through cart items
 foreach(WC()->cart->get_cart() as $cart_item){
 $index++;
 // 2nd Loop through each unit related to item quantity
 for($i = 1; $i <= $cart_item['quantity']; $i++){

woocommerce_form_field("my_field[$index][$i]", array(
                'type' =>'text',
                'class'=>array('my-field-class form-row-wide'),
                'label'=>__('My Field')." (item $index - $i)",
                'placeholder'=>__('Please enter your data'),
            ), $checkout->get_value("my_field[$index][$i]"));
        }
    }
}

// Save fields in order meta data
add_action('woocommerce_checkout_create_order', 'save_custom_fields_to_order_meta_data', 20, 2 );
function save_custom_fields_to_order_meta_data( $order, $data ) {
    $index = 0;

// 1st Loop through order items
 foreach( $order->get_items() as $item ){
 $index++;
 // 2nd Loop through each unit related to item quantity
 for($i = 1; $i <= $item->get_quantity(); $i++){
 if (isset( $_POST['my_field'][$index][$i]) && ! empty($_POST['my_field'][$index][$i]) ){
 $order->update_meta_data( '_my_field_'.$index.'_'.$i, esc_attr( $_POST['my_field'][$index][$i] ) );
 }
 }
 }
}

// Display fields in order edit pages
add_action('woocommerce_admin_order_data_after_billing_address','display_custom_fields_in_admin_order', 20, 1);
function display_custom_fields_in_admin_order( $order ){
    $index = 0;

// 1st Loop through order items
 foreach( $order->get_items() as $item ){
 $index++;
 // 2nd Loop through each unit related to item quantity
 for($i = 1; $i <= $item->get_quantity(); $i++){
 $my_field = get_post_meta($order->get_id(),'_my_field_'.$index.'_'.$i, true );
 if (! empty($my_field) ){
 echo ''.__('My Field')." (item $index - $i)".': ' . $my_field . '';
 }
 }
 }
}

</code>
 </pre>
  
    代码位于活动子主题（或活动主题）的function.php文件中。经过测试和工作
  
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