Update 2- 两步
1）保存数据：
我们会保存此自定义客户数据作为“隐藏”订单"item"元数据，然后也作为订单元数据，因为这与具有唯一订单项的订阅相关：
// Utility function: array of custom customer key/label pairs
function custom_data_keys_labels(){
return array(
'name' => __('Customer name'), 'email' => __('Customer email'),
'sex' => __('Customer gender'), 'age' => __('Customer age'),
);
}
// Add/save custom field value as custom HIDDEN order item meta data
add_action( 'woocommerce_checkout_create_order_line_item', 'custom_field_update_order_item_meta', 20, 4 );
function custom_field_update_order_item_meta( $item, $cart_item_key, $values, $order ) {
if ( ! isset( $values['custom_data'] ) )
return;
$custom_data = $values['custom_data'];
$meta_data = array();
$labels_keys = custom_data_keys_labels();
foreach( $labels_keys as $key => $label ){
if ( isset( $custom_data[$key] ) )
$meta_data[$key] = $custom_data[$key];
}
if ( sizeof( $meta_data ) > 0 )
$item->update_meta_data( __('_customer_data'), $meta_data );
return $cart_item_data;
}
// Add/save custom fields values as custom order meta data
add_action( 'woocommerce_checkout_create_order', 'my_custom_checkout_field_update_order_meta', 20, 2 );
function my_custom_checkout_field_update_order_meta( $order, $data ) {
$order_items = $order->get_items(); // Order itesm
$item = reset($order_items); // Keep only the first order item
$item_data = $item->get_meta( '_customer_data' ); // Get custom customer data
if( is_array($item_data) && sizeof($item_data) > 0 ){
foreach( $item_data as $key => $value ) {
if ( isset( $item_data[$key] ) )
$order->update_meta_data( '_customer_' . $key, $value );
}
// Mark as data saved
$order->update_meta_data( '_customer_data_set', true );
}
}
代码位于活动子主题（或活动主题）的 function.php 文件中。经过测试并有效。
2）显示保存的自定义数据：
下面的代码也使用了我们的实用函数custom_data_keys_labels()…
// Order pages (frontend and admin) display
add_filter( 'woocommerce_order_details_after_order_table' , 'display_admin_order_meta_cutom_data', 20, 1 ); // Front
add_action( 'woocommerce_admin_order_data_after_billing_address', 'display_admin_order_meta_cutom_data', 20, 1 ); // Admin
function display_admin_order_meta_cutom_data( $order ){
$labels_keys = custom_data_keys_labels();
if( $order->get_meta( '_customer_data_set' ) ){
if( is_admin() ){ // Admin
echo '<p>';
foreach( $labels_keys as $key => $label ){
if ( $order->get_meta( '_customer_' . $key ) )
echo '<strong>' . $label . ':</strong> ' . $order->get_meta( '_customer_' . $key ) . '<br>';
}
echo '</p>';
}
else { // Front end: order view and Order received (thankyou)
echo '<table class="woocommerce-table"><tbody>';
foreach( $labels_keys as $key => $label ){
if ( $order->get_meta( '_customer_' . $key ) )
echo '<tr><th>' . $label . ':</th><td>' . $order->get_meta( '_customer_' . $key ) . '</td></tr>';
}
echo '</tbody></table>';
}
}
}
// Email notifications display
add_filter( 'woocommerce_email_order_meta_fields' , 'display_email_cutom_data', 20, 3 );
function display_email_cutom_data ( $fields, $sent_to_admin, $order ) {
$labels_keys = custom_data_keys_labels();
if( $order->get_meta( '_customer_data_set' ) ){
foreach( $labels_keys as $key => $label ){
$fields['customer_' . $key] = array(
'label' => $label,
'value' => $order->get_meta( '_customer_' . $key ),
);
}
}
return $fields;
}
代码位于活动子主题（或活动主题）的 function.php 文件中。经过测试并有效。
